Stanojević, Dragan

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  • Stanojević, Dragan (16)
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Author's Bibliography

ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE

Samolovac, Ljiljana; Nikšić, Dragan; Ostojić Andrić, Dušica; Živković, Vladimir; Stanojević, Dragan; Pantelić, Vlada; Mićić, Nenad

(Institut za stočarstvo, Beograd-Zemun, 2023-10-04)

TY  - CONF
AU  - Samolovac, Ljiljana
AU  - Nikšić, Dragan
AU  - Ostojić Andrić, Dušica
AU  - Živković, Vladimir
AU  - Stanojević, Dragan
AU  - Pantelić, Vlada
AU  - Mićić, Nenad
PY  - 2023-10-04
UR  - http://r.istocar.bg.ac.rs/handle/123456789/921
AB  - The greenhouse effect has led to a changed precipitation regime, an
increase in the average temperature, the occurrence of extreme meteorological
events (droughts and floods) and the like. All this harms the yield and quality of
feed, the incidence of mycotoxins in food, reduced productivity of animals, the
incidence of new and non-specific pathogens, the development of diseases, etc.
According to the FAO and the World Bank, the countries most affected by climate
change are the countries of Central Europe and the Mediterranean. The population
of people living in rural areas and engaged in agriculture will be particularly at
risk. With difficult working and living conditions and reduced incomes, there will
be an increased migration of the population to the cities. The simultaneous decline
in agricultural production and increased food demand will lead to a food supply
crisis (FAO predicts that by 2050 the global population will increase to 9.6 billion
people, resulting in a demand for 70% more food than in 2013).Cattle production is
affected by the climate in different ways, directly and indirectly. Livestock
condition, production level, reproductive performance, morbidity and mortality are
correlated with climatic conditions. The most pronounced negative impact on the
health and welfare of animals is a phenomenon called heat stress. Exposure to
microclimatic conditions characterized by a combination of high temperature and
air humidity overcomes the ability of animals to maintain normal thermoregulation
and constant body temperature, leading to an increase in body temperature that
exceeds physiological limits. In addition to the direct effects of heat stress on the
productivity, reproduction and health status of animals, global warming also affects
animals indirectly through reduced soil fertility, water availability, crop yields,
quality of plant nutrients and the circulation of pathogenic agents. Finding a
solution to mitigate and prevent the consequences of unfavourable climatic and
microclimatic conditions is a challenge for the entire scientific and professional
community, but also for every cattle breeder. Solutions can be biological and
technological. Biological ones refer to the animals themselves (breed selection,
selection for functional traits, selection for adaptability to heat stress, use of
genomic selection, artificial insemination programs, herd size). Technological
solutions relate to how animals are kept (free system, in outlets with canopies, use
of grazing), facilities (new materials and technical solutions in the construction of
facilities, use of insulating materials, regulation of microclimate conditions in
facilities - ventilation and air humidity), nutrition and feeding (feeding method,
feeding time, use of new types of feed, continuous water supply, etc.).The goal of
agricultural production is to ensure food security in the face of climate change, and
it is one of the most demanding tasks facing humanity
PB  - Institut za stočarstvo, Beograd-Zemun
C3  - Proceedings of the 14th International Symposium, "Modern Trends in Livestock Production", Belgrade, Serbia
T1  - ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE
SP  - 114
EP  - 128
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_921
ER  - 
@conference{
author = "Samolovac, Ljiljana and Nikšić, Dragan and Ostojić Andrić, Dušica and Živković, Vladimir and Stanojević, Dragan and Pantelić, Vlada and Mićić, Nenad",
year = "2023-10-04",
abstract = "The greenhouse effect has led to a changed precipitation regime, an
increase in the average temperature, the occurrence of extreme meteorological
events (droughts and floods) and the like. All this harms the yield and quality of
feed, the incidence of mycotoxins in food, reduced productivity of animals, the
incidence of new and non-specific pathogens, the development of diseases, etc.
According to the FAO and the World Bank, the countries most affected by climate
change are the countries of Central Europe and the Mediterranean. The population
of people living in rural areas and engaged in agriculture will be particularly at
risk. With difficult working and living conditions and reduced incomes, there will
be an increased migration of the population to the cities. The simultaneous decline
in agricultural production and increased food demand will lead to a food supply
crisis (FAO predicts that by 2050 the global population will increase to 9.6 billion
people, resulting in a demand for 70% more food than in 2013).Cattle production is
affected by the climate in different ways, directly and indirectly. Livestock
condition, production level, reproductive performance, morbidity and mortality are
correlated with climatic conditions. The most pronounced negative impact on the
health and welfare of animals is a phenomenon called heat stress. Exposure to
microclimatic conditions characterized by a combination of high temperature and
air humidity overcomes the ability of animals to maintain normal thermoregulation
and constant body temperature, leading to an increase in body temperature that
exceeds physiological limits. In addition to the direct effects of heat stress on the
productivity, reproduction and health status of animals, global warming also affects
animals indirectly through reduced soil fertility, water availability, crop yields,
quality of plant nutrients and the circulation of pathogenic agents. Finding a
solution to mitigate and prevent the consequences of unfavourable climatic and
microclimatic conditions is a challenge for the entire scientific and professional
community, but also for every cattle breeder. Solutions can be biological and
technological. Biological ones refer to the animals themselves (breed selection,
selection for functional traits, selection for adaptability to heat stress, use of
genomic selection, artificial insemination programs, herd size). Technological
solutions relate to how animals are kept (free system, in outlets with canopies, use
of grazing), facilities (new materials and technical solutions in the construction of
facilities, use of insulating materials, regulation of microclimate conditions in
facilities - ventilation and air humidity), nutrition and feeding (feeding method,
feeding time, use of new types of feed, continuous water supply, etc.).The goal of
agricultural production is to ensure food security in the face of climate change, and
it is one of the most demanding tasks facing humanity",
publisher = "Institut za stočarstvo, Beograd-Zemun",
journal = "Proceedings of the 14th International Symposium, "Modern Trends in Livestock Production", Belgrade, Serbia",
title = "ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE",
pages = "114-128",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_921"
}
Samolovac, L., Nikšić, D., Ostojić Andrić, D., Živković, V., Stanojević, D., Pantelić, V.,& Mićić, N.. (2023-10-04). ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE. in Proceedings of the 14th International Symposium, "Modern Trends in Livestock Production", Belgrade, Serbia
Institut za stočarstvo, Beograd-Zemun., 114-128.
https://hdl.handle.net/21.15107/rcub_ristocar_921
Samolovac L, Nikšić D, Ostojić Andrić D, Živković V, Stanojević D, Pantelić V, Mićić N. ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE. in Proceedings of the 14th International Symposium, "Modern Trends in Livestock Production", Belgrade, Serbia. 2023;:114-128.
https://hdl.handle.net/21.15107/rcub_ristocar_921 .
Samolovac, Ljiljana, Nikšić, Dragan, Ostojić Andrić, Dušica, Živković, Vladimir, Stanojević, Dragan, Pantelić, Vlada, Mićić, Nenad, "ORGANIZATION OF CATTLE PRODUCTION IN CONDITIONS OF CLIMATE CHANGE" in Proceedings of the 14th International Symposium, "Modern Trends in Livestock Production", Belgrade, Serbia (2023-10-04):114-128,
https://hdl.handle.net/21.15107/rcub_ristocar_921 .

Trend of milk yield traits of bull mothers of the Holstein-Friesian breed

Lazarević, Marina; Pantelić, Vlada; Stanojević, Dragan; Nikšić, Dragan; Maksimović, Nevena; Marinkovic, Milos; Samolovac, Ljiljana

(2023-10)

TY  - JOUR
AU  - Lazarević, Marina
AU  - Pantelić, Vlada
AU  - Stanojević, Dragan
AU  - Nikšić, Dragan
AU  - Maksimović, Nevena
AU  - Marinkovic, Milos
AU  - Samolovac, Ljiljana
PY  - 2023-10
UR  - http://r.istocar.bg.ac.rs/handle/123456789/907
AB  - The research was conducted on 175 cows of the Holstein-Friesian breed
that were selected as bull dams and achieved 400 lactations.
Animals are reared on 5 farms of the "Belgrade" Agricultural Corporation. Bull
dams are the offspring of 32 bulls calved between 2007 and 2014. The research
included the following characteristics of milk yield in standard lactation (305
days): milk yield (kg), milk fat yield (kg), milk fat content (%), protein yield (kg),
protein content (%). The variability of traits and the influence of factors (farm,
lactation in order, season and year of calving, bull-sire) were evaluated by the
method of least squares using the GLM (General Linear Model) procedure in the
SAS software package. The average milk yield of bull dams is 9617.11 kg, with
3.44% milk fat and 3.21% protein. The average yield of milk fat and protein is
329.56 kg and 308.65 kg, respectively. The largest positive deviation of milk yield
from the general average is 363.64 kg, while the largest negative deviation is -
1021.36. The largest negative deviation of milk fat yield and protein yield is -21.74
kg and -36.09 kg, respectively. The largest positive deviation of milk fat yield is
18.35 kg and protein yield is 9.46 kg. The influence of the farm is present in the
variability of all the observed traits of milk production except milk yield. Lactation
in turn had a statistical effect (p<0.05) on all traits included in the research, except
for protein content. The influence of the calving season is present in the variability
of milk yield and protein yield, while it had no effect on the other traits included in
the research. Calving year statistically (p<0.05) had a significant effect on the
variability of all observed milk yield traits. The sire bull influenced the phenotypic
expression of milk yield traits, while his influence on the variability of milk fat and
protein content was not significant.The results of the research indicate that the
established variability of milk yield traits in the population of the Holstein-Friesian
breed provides enough room for their further improvement through selection.
T2  - Proceedings of the 14th International Symposium Modern Trends in Livestock Production
T1  - Trend of milk yield traits of bull mothers of the Holstein-Friesian breed
SP  - 408
EP  - 417
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_907
ER  - 
@article{
author = "Lazarević, Marina and Pantelić, Vlada and Stanojević, Dragan and Nikšić, Dragan and Maksimović, Nevena and Marinkovic, Milos and Samolovac, Ljiljana",
year = "2023-10",
abstract = "The research was conducted on 175 cows of the Holstein-Friesian breed
that were selected as bull dams and achieved 400 lactations.
Animals are reared on 5 farms of the "Belgrade" Agricultural Corporation. Bull
dams are the offspring of 32 bulls calved between 2007 and 2014. The research
included the following characteristics of milk yield in standard lactation (305
days): milk yield (kg), milk fat yield (kg), milk fat content (%), protein yield (kg),
protein content (%). The variability of traits and the influence of factors (farm,
lactation in order, season and year of calving, bull-sire) were evaluated by the
method of least squares using the GLM (General Linear Model) procedure in the
SAS software package. The average milk yield of bull dams is 9617.11 kg, with
3.44% milk fat and 3.21% protein. The average yield of milk fat and protein is
329.56 kg and 308.65 kg, respectively. The largest positive deviation of milk yield
from the general average is 363.64 kg, while the largest negative deviation is -
1021.36. The largest negative deviation of milk fat yield and protein yield is -21.74
kg and -36.09 kg, respectively. The largest positive deviation of milk fat yield is
18.35 kg and protein yield is 9.46 kg. The influence of the farm is present in the
variability of all the observed traits of milk production except milk yield. Lactation
in turn had a statistical effect (p<0.05) on all traits included in the research, except
for protein content. The influence of the calving season is present in the variability
of milk yield and protein yield, while it had no effect on the other traits included in
the research. Calving year statistically (p<0.05) had a significant effect on the
variability of all observed milk yield traits. The sire bull influenced the phenotypic
expression of milk yield traits, while his influence on the variability of milk fat and
protein content was not significant.The results of the research indicate that the
established variability of milk yield traits in the population of the Holstein-Friesian
breed provides enough room for their further improvement through selection.",
journal = "Proceedings of the 14th International Symposium Modern Trends in Livestock Production",
title = "Trend of milk yield traits of bull mothers of the Holstein-Friesian breed",
pages = "408-417",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_907"
}
Lazarević, M., Pantelić, V., Stanojević, D., Nikšić, D., Maksimović, N., Marinkovic, M.,& Samolovac, L.. (2023-10). Trend of milk yield traits of bull mothers of the Holstein-Friesian breed. in Proceedings of the 14th International Symposium Modern Trends in Livestock Production, 408-417.
https://hdl.handle.net/21.15107/rcub_ristocar_907
Lazarević M, Pantelić V, Stanojević D, Nikšić D, Maksimović N, Marinkovic M, Samolovac L. Trend of milk yield traits of bull mothers of the Holstein-Friesian breed. in Proceedings of the 14th International Symposium Modern Trends in Livestock Production. 2023;:408-417.
https://hdl.handle.net/21.15107/rcub_ristocar_907 .
Lazarević, Marina, Pantelić, Vlada, Stanojević, Dragan, Nikšić, Dragan, Maksimović, Nevena, Marinkovic, Milos, Samolovac, Ljiljana, "Trend of milk yield traits of bull mothers of the Holstein-Friesian breed" in Proceedings of the 14th International Symposium Modern Trends in Livestock Production (2023-10):408-417,
https://hdl.handle.net/21.15107/rcub_ristocar_907 .

Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows

Đedović, Radica; Ismael, Hasan; Bogdanović, Vladan; Stanojević, Dragan; Trivunović, Snežana; Janković, Dobrila; Stamenić, Tamara

(Pakistan Agricultural Scientists Forum (PAS FORUM), 2022-10-05)

TY  - JOUR
AU  - Đedović, Radica
AU  - Ismael, Hasan
AU  - Bogdanović, Vladan
AU  - Stanojević, Dragan
AU  - Trivunović, Snežana
AU  - Janković, Dobrila
AU  - Stamenić, Tamara
PY  - 2022-10-05
UR  - http://r.istocar.bg.ac.rs/handle/123456789/875
AB  - The present research aimed to investigate the genetic trends for udder traits (fore udder attachment; rear udder height;
udder depth; front teat placement; rear teat placement; front teat length and rear teat length) and angularity of Holstein
Friesian cows in Serbia. A multi-trait animal model was used to estimate genetic parameters, through REML procedures.
In the study 10403 first-lactation cows Holstein type from 12 different regions in Serbia were included. The cows were
daughters of 221 Holstein Friesian sires. The age at first calving was from 19 to 44 months, and there were 10 stages of
lactation. Udder type traits and angularity were classified by 24 classifiers on a linear scale of 1 to 9. Udder type traits
had heritability estimates ranging from 0.03 for rear teat placement to 0.12 for fore udder attachment, and angularity had
heritability 0.10. Genetic trend for angularity of Holstein Friesian cows in Serbia shows that ribs are becoming less
angular and extremely rounded, while genetic trends for udder traits show that teat lengths are becoming longer and
inside of quarter, and udder is shallow. The genetic trend for fore udder attachment indicates there is indirect selection
for weaker udders.
PB  - Pakistan Agricultural Scientists Forum (PAS FORUM)
T2  - Journal of Animal and Plant Sciences
T1  - Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows
VL  - 32
IS  - 5
SP  - 1176
EP  - 1184
DO  - 10.36899/JAPS.2022.5.0523
ER  - 
@article{
author = "Đedović, Radica and Ismael, Hasan and Bogdanović, Vladan and Stanojević, Dragan and Trivunović, Snežana and Janković, Dobrila and Stamenić, Tamara",
year = "2022-10-05",
abstract = "The present research aimed to investigate the genetic trends for udder traits (fore udder attachment; rear udder height;
udder depth; front teat placement; rear teat placement; front teat length and rear teat length) and angularity of Holstein
Friesian cows in Serbia. A multi-trait animal model was used to estimate genetic parameters, through REML procedures.
In the study 10403 first-lactation cows Holstein type from 12 different regions in Serbia were included. The cows were
daughters of 221 Holstein Friesian sires. The age at first calving was from 19 to 44 months, and there were 10 stages of
lactation. Udder type traits and angularity were classified by 24 classifiers on a linear scale of 1 to 9. Udder type traits
had heritability estimates ranging from 0.03 for rear teat placement to 0.12 for fore udder attachment, and angularity had
heritability 0.10. Genetic trend for angularity of Holstein Friesian cows in Serbia shows that ribs are becoming less
angular and extremely rounded, while genetic trends for udder traits show that teat lengths are becoming longer and
inside of quarter, and udder is shallow. The genetic trend for fore udder attachment indicates there is indirect selection
for weaker udders.",
publisher = "Pakistan Agricultural Scientists Forum (PAS FORUM)",
journal = "Journal of Animal and Plant Sciences",
title = "Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows",
volume = "32",
number = "5",
pages = "1176-1184",
doi = "10.36899/JAPS.2022.5.0523"
}
Đedović, R., Ismael, H., Bogdanović, V., Stanojević, D., Trivunović, S., Janković, D.,& Stamenić, T.. (2022-10-05). Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows. in Journal of Animal and Plant Sciences
Pakistan Agricultural Scientists Forum (PAS FORUM)., 32(5), 1176-1184.
https://doi.org/10.36899/JAPS.2022.5.0523
Đedović R, Ismael H, Bogdanović V, Stanojević D, Trivunović S, Janković D, Stamenić T. Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows. in Journal of Animal and Plant Sciences. 2022;32(5):1176-1184.
doi:10.36899/JAPS.2022.5.0523 .
Đedović, Radica, Ismael, Hasan, Bogdanović, Vladan, Stanojević, Dragan, Trivunović, Snežana, Janković, Dobrila, Stamenić, Tamara, "Genetic and phenotypic trends for udder traits and angularity of Holstein Friesian cows" in Journal of Animal and Plant Sciences, 32, no. 5 (2022-10-05):1176-1184,
https://doi.org/10.36899/JAPS.2022.5.0523 . .
1
1

The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia

Stanojević, Dragan; Đedović, Radica; Bogdanović, Vladan; Zeljić Stojiljković, Krstina; Gligović, Nikolija; Mitrović, Ivan; Lazarević, Marina; Samolovac, Ljiljana

(Faculty of Agriculture, University of Banja Luka, 2022-05-26)

TY  - CONF
AU  - Stanojević, Dragan
AU  - Đedović, Radica
AU  - Bogdanović, Vladan
AU  - Zeljić Stojiljković, Krstina
AU  - Gligović, Nikolija
AU  - Mitrović, Ivan
AU  - Lazarević, Marina
AU  - Samolovac, Ljiljana
PY  - 2022-05-26
UR  - http://r.istocar.bg.ac.rs/handle/123456789/833
AB  - The objective of this research was to study phenotypic expression and factors that can affect 
milk yield traits in the population of Simmental cattle breed in the Republic of Serbia. The 
research was conducted on a set of data that included records on the production and origin of 
Simmental breed cows displayed both in regional and municipal exhibitions in the territory of 
the Republic of Serbia in the period from 2004 to 2017. A final data set included records on 
production and origin of 1176 Simmental breed cows. The animals were raised in the area 
covering 9 regions of the Republic of Serbia. The research included most important milk 
yield traits in standard lactation: milk yield, milk fat content, milk fat yield, yield of 4% fat corrected milk (4%FCM). An average milk yield in studied population accounted for 
5.520±919 kg, milk fat content 3.94±0.11%, milk fat yield 218±38 kg, while the yield of 4% 
fat-corrected milk accounted for 5.474±933 kg. It was determined that region, age and 
lactation had a very high statistically significant effect on studied traits while the age of cows 
had no statistical effect.
PB  - Faculty of Agriculture, University of Banja Luka
C3  - Faculty of Agriculture University of Banja Luka
T1  - The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia
SP  - 328
EP  - 335
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_833
ER  - 
@conference{
author = "Stanojević, Dragan and Đedović, Radica and Bogdanović, Vladan and Zeljić Stojiljković, Krstina and Gligović, Nikolija and Mitrović, Ivan and Lazarević, Marina and Samolovac, Ljiljana",
year = "2022-05-26",
abstract = "The objective of this research was to study phenotypic expression and factors that can affect 
milk yield traits in the population of Simmental cattle breed in the Republic of Serbia. The 
research was conducted on a set of data that included records on the production and origin of 
Simmental breed cows displayed both in regional and municipal exhibitions in the territory of 
the Republic of Serbia in the period from 2004 to 2017. A final data set included records on 
production and origin of 1176 Simmental breed cows. The animals were raised in the area 
covering 9 regions of the Republic of Serbia. The research included most important milk 
yield traits in standard lactation: milk yield, milk fat content, milk fat yield, yield of 4% fat corrected milk (4%FCM). An average milk yield in studied population accounted for 
5.520±919 kg, milk fat content 3.94±0.11%, milk fat yield 218±38 kg, while the yield of 4% 
fat-corrected milk accounted for 5.474±933 kg. It was determined that region, age and 
lactation had a very high statistically significant effect on studied traits while the age of cows 
had no statistical effect.",
publisher = "Faculty of Agriculture, University of Banja Luka",
journal = "Faculty of Agriculture University of Banja Luka",
title = "The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia",
pages = "328-335",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_833"
}
Stanojević, D., Đedović, R., Bogdanović, V., Zeljić Stojiljković, K., Gligović, N., Mitrović, I., Lazarević, M.,& Samolovac, L.. (2022-05-26). The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia. in Faculty of Agriculture University of Banja Luka
Faculty of Agriculture, University of Banja Luka., 328-335.
https://hdl.handle.net/21.15107/rcub_ristocar_833
Stanojević D, Đedović R, Bogdanović V, Zeljić Stojiljković K, Gligović N, Mitrović I, Lazarević M, Samolovac L. The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia. in Faculty of Agriculture University of Banja Luka. 2022;:328-335.
https://hdl.handle.net/21.15107/rcub_ristocar_833 .
Stanojević, Dragan, Đedović, Radica, Bogdanović, Vladan, Zeljić Stojiljković, Krstina, Gligović, Nikolija, Mitrović, Ivan, Lazarević, Marina, Samolovac, Ljiljana, "The impact of breeding region and lactation on milk yield traits in the of Simmental cattle population of the Republic of Serbia" in Faculty of Agriculture University of Banja Luka (2022-05-26):328-335,
https://hdl.handle.net/21.15107/rcub_ristocar_833 .

ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM

Samolovac, Ljiljana; Hristov, Slavča; Ostojić Andrić, Dušica; Pantelić, Vlada; Nikšić, Dragan; Stanojević, Dragan; Stamenić, Tamara

(2021-10-06)

TY  - CONF
AU  - Samolovac, Ljiljana
AU  - Hristov, Slavča
AU  - Ostojić Andrić, Dušica
AU  - Pantelić, Vlada
AU  - Nikšić, Dragan
AU  - Stanojević, Dragan
AU  - Stamenić, Tamara
PY  - 2021-10-06
UR  - http://r.istocar.bg.ac.rs/handle/123456789/919
AB  - The quality of farm animal welfare largely depends on a number
of measures and procedures carried out on farms, which are defined by one name
as biosecurity. The application of certain management practices differs from farm
to farm, and accordingly their impact on the quality of animal welfare differs. The
quality of biosecurity, welfare and the presence of factors that threaten them
depend on the technology of production on the farm, animal husbandry systems,
microclimatic and hygienic conditions, management, procedures performed on
animals and the way they are performed, the attitude of employees towards
animals, their training and competence, etc.The aim of this study was to determine
the impact of intensive calf rearing on differences in biosecurity and welfare
quality assessment on two dairy farms. The technological process of production on
both farms is similar, since both farms operate within the same production system.
On both farms, there is a nursery in a separate facility, but without individual
calving boxes. Calves are separated from their mothers immediately after birth.
One of the significant differences between the farms was the way the calves were
kept in the first 7 days of life. On one of the farms (A) the calves were kept tied in
the nursery, while on the other farm (B) they were housed in individual boxes, also
located within the nursery. At 8 days of age, calves were placed in group boxes, in
a special facility, rearing stable.
The greatest weaknesses and threats to biosecurity and welfare on both farms were
manifested at the earliest age of calves, and they relate to the accommodation and
feeding of newborn calves with colostrum. Determined that newborn calves were
kept tie-stall housing system or in dimly lit individual boxes of inadequate size and
design, housed in the nursery together with the cows. This increased the calf's
exposure to a number of pathogens. The risk to biosecurity and welfare is higher
when inadequate colostrum consumption is taken into account in terms of quantity,
manner and time of feeding. When it comes to calves of older categories, the
situation was significantly more favourable in terms of nutrition and housing
conditions, as well as health surveillance and provided great opportunities in terms
of further improvement.
C3  - Proceedings of the 13th International Symposium Modern Trends in Livestock Production
T1  - ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM
SP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_919
ER  - 
@conference{
author = "Samolovac, Ljiljana and Hristov, Slavča and Ostojić Andrić, Dušica and Pantelić, Vlada and Nikšić, Dragan and Stanojević, Dragan and Stamenić, Tamara",
year = "2021-10-06",
abstract = "The quality of farm animal welfare largely depends on a number
of measures and procedures carried out on farms, which are defined by one name
as biosecurity. The application of certain management practices differs from farm
to farm, and accordingly their impact on the quality of animal welfare differs. The
quality of biosecurity, welfare and the presence of factors that threaten them
depend on the technology of production on the farm, animal husbandry systems,
microclimatic and hygienic conditions, management, procedures performed on
animals and the way they are performed, the attitude of employees towards
animals, their training and competence, etc.The aim of this study was to determine
the impact of intensive calf rearing on differences in biosecurity and welfare
quality assessment on two dairy farms. The technological process of production on
both farms is similar, since both farms operate within the same production system.
On both farms, there is a nursery in a separate facility, but without individual
calving boxes. Calves are separated from their mothers immediately after birth.
One of the significant differences between the farms was the way the calves were
kept in the first 7 days of life. On one of the farms (A) the calves were kept tied in
the nursery, while on the other farm (B) they were housed in individual boxes, also
located within the nursery. At 8 days of age, calves were placed in group boxes, in
a special facility, rearing stable.
The greatest weaknesses and threats to biosecurity and welfare on both farms were
manifested at the earliest age of calves, and they relate to the accommodation and
feeding of newborn calves with colostrum. Determined that newborn calves were
kept tie-stall housing system or in dimly lit individual boxes of inadequate size and
design, housed in the nursery together with the cows. This increased the calf's
exposure to a number of pathogens. The risk to biosecurity and welfare is higher
when inadequate colostrum consumption is taken into account in terms of quantity,
manner and time of feeding. When it comes to calves of older categories, the
situation was significantly more favourable in terms of nutrition and housing
conditions, as well as health surveillance and provided great opportunities in terms
of further improvement.",
journal = "Proceedings of the 13th International Symposium Modern Trends in Livestock Production",
title = "ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM",
pages = "56",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_919"
}
Samolovac, L., Hristov, S., Ostojić Andrić, D., Pantelić, V., Nikšić, D., Stanojević, D.,& Stamenić, T.. (2021-10-06). ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM. in Proceedings of the 13th International Symposium Modern Trends in Livestock Production, 56.
https://hdl.handle.net/21.15107/rcub_ristocar_919
Samolovac L, Hristov S, Ostojić Andrić D, Pantelić V, Nikšić D, Stanojević D, Stamenić T. ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM. in Proceedings of the 13th International Symposium Modern Trends in Livestock Production. 2021;:56.
https://hdl.handle.net/21.15107/rcub_ristocar_919 .
Samolovac, Ljiljana, Hristov, Slavča, Ostojić Andrić, Dušica, Pantelić, Vlada, Nikšić, Dragan, Stanojević, Dragan, Stamenić, Tamara, "ASSESSMENT OF BIOSECURITY AND WELFARE OF CALVES REARED IN INTENSIVE HOUSING SYSTEM" in Proceedings of the 13th International Symposium Modern Trends in Livestock Production (2021-10-06):56,
https://hdl.handle.net/21.15107/rcub_ristocar_919 .

Assessment of biosecurity and welfare of calves reared in intensive housing system

Samolovac, Ljiljana; Hristov, Slavča; Ostojić Andrić, Dušica; Pantelić, Vlada; Nikšić, Dragan; Stanojević, Dragan; Stamenić, Tamara

(Institute for Animal Husbandry, Belgrade-Zemun, 2021-10)

TY  - CONF
AU  - Samolovac, Ljiljana
AU  - Hristov, Slavča
AU  - Ostojić Andrić, Dušica
AU  - Pantelić, Vlada
AU  - Nikšić, Dragan
AU  - Stanojević, Dragan
AU  - Stamenić, Tamara
PY  - 2021-10
UR  - http://r.istocar.bg.ac.rs/handle/123456789/763
AB  - The quality of farm animal welfare largely depends on a number
of measures and procedures carried out on farms, which are defined by one name
as biosecurity. The application of certain management practices differs from farm
to farm, and accordingly their impact on the quality of animal welfare differs. The
quality of biosecurity, welfare and the presence of factors that threaten them
depend on the technology of production on the farm, animal husbandry systems,
microclimatic and hygienic conditions, management, procedures performed on
animals and the way they are performed, the attitude of employees towards
animals, their training and competence, etc.The aim of this study was to determine
the impact of intensive calf rearing on differences in biosecurity and welfare
quality assessment on two dairy farms. The technological process of production on
both farms is similar, since both farms operate within the same production system.
On both farms, there is a nursery in a separate facility, but without individual
calving boxes. Calves are separated from their mothers immediately after birth.
One of the significant differences between the farms was the way the calves were
kept in the first 7 days of life. On one of the farms (A) the calves were kept tied in
the nursery, while on the other farm (B) they were housed in individual boxes, also
located within the nursery. At 8 days of age, calves were placed in group boxes, in
a special facility, rearing stable.
The greatest weaknesses and threats to biosecurity and welfare on both farms were
manifested at the earliest age of calves, and they relate to the accommodation and
feeding of newborn calves with colostrum. Determined that newborn calves were
kept tie-stall housing system or in dimly lit individual boxes of inadequate size and
design, housed in the nursery together with the cows. This increased the calf's
exposure to a number of pathogens. The risk to biosecurity and welfare is higher
when inadequate colostrum consumption is taken into account in terms of quantity,
manner and time of feeding. When it comes to calves of older categories, the
situation was significantly more favourable in terms of nutrition and housing
conditions, as well as health surveillance and provided great opportunities in terms
of further improvement.
PB  - Institute for Animal Husbandry, Belgrade-Zemun
C3  - Proceedings of the 13th International Symposium Modern Trends in Livestock Production October 6 – 8, 2021, Belgrade, Serbia
T1  - Assessment of biosecurity and welfare of calves reared in intensive housing system
SP  - 56
EP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_763
ER  - 
@conference{
author = "Samolovac, Ljiljana and Hristov, Slavča and Ostojić Andrić, Dušica and Pantelić, Vlada and Nikšić, Dragan and Stanojević, Dragan and Stamenić, Tamara",
year = "2021-10",
abstract = "The quality of farm animal welfare largely depends on a number
of measures and procedures carried out on farms, which are defined by one name
as biosecurity. The application of certain management practices differs from farm
to farm, and accordingly their impact on the quality of animal welfare differs. The
quality of biosecurity, welfare and the presence of factors that threaten them
depend on the technology of production on the farm, animal husbandry systems,
microclimatic and hygienic conditions, management, procedures performed on
animals and the way they are performed, the attitude of employees towards
animals, their training and competence, etc.The aim of this study was to determine
the impact of intensive calf rearing on differences in biosecurity and welfare
quality assessment on two dairy farms. The technological process of production on
both farms is similar, since both farms operate within the same production system.
On both farms, there is a nursery in a separate facility, but without individual
calving boxes. Calves are separated from their mothers immediately after birth.
One of the significant differences between the farms was the way the calves were
kept in the first 7 days of life. On one of the farms (A) the calves were kept tied in
the nursery, while on the other farm (B) they were housed in individual boxes, also
located within the nursery. At 8 days of age, calves were placed in group boxes, in
a special facility, rearing stable.
The greatest weaknesses and threats to biosecurity and welfare on both farms were
manifested at the earliest age of calves, and they relate to the accommodation and
feeding of newborn calves with colostrum. Determined that newborn calves were
kept tie-stall housing system or in dimly lit individual boxes of inadequate size and
design, housed in the nursery together with the cows. This increased the calf's
exposure to a number of pathogens. The risk to biosecurity and welfare is higher
when inadequate colostrum consumption is taken into account in terms of quantity,
manner and time of feeding. When it comes to calves of older categories, the
situation was significantly more favourable in terms of nutrition and housing
conditions, as well as health surveillance and provided great opportunities in terms
of further improvement.",
publisher = "Institute for Animal Husbandry, Belgrade-Zemun",
journal = "Proceedings of the 13th International Symposium Modern Trends in Livestock Production October 6 – 8, 2021, Belgrade, Serbia",
title = "Assessment of biosecurity and welfare of calves reared in intensive housing system",
pages = "56-72",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_763"
}
Samolovac, L., Hristov, S., Ostojić Andrić, D., Pantelić, V., Nikšić, D., Stanojević, D.,& Stamenić, T.. (2021-10). Assessment of biosecurity and welfare of calves reared in intensive housing system. in Proceedings of the 13th International Symposium Modern Trends in Livestock Production October 6 – 8, 2021, Belgrade, Serbia
Institute for Animal Husbandry, Belgrade-Zemun., 56-72.
https://hdl.handle.net/21.15107/rcub_ristocar_763
Samolovac L, Hristov S, Ostojić Andrić D, Pantelić V, Nikšić D, Stanojević D, Stamenić T. Assessment of biosecurity and welfare of calves reared in intensive housing system. in Proceedings of the 13th International Symposium Modern Trends in Livestock Production October 6 – 8, 2021, Belgrade, Serbia. 2021;:56-72.
https://hdl.handle.net/21.15107/rcub_ristocar_763 .
Samolovac, Ljiljana, Hristov, Slavča, Ostojić Andrić, Dušica, Pantelić, Vlada, Nikšić, Dragan, Stanojević, Dragan, Stamenić, Tamara, "Assessment of biosecurity and welfare of calves reared in intensive housing system" in Proceedings of the 13th International Symposium Modern Trends in Livestock Production October 6 – 8, 2021, Belgrade, Serbia (2021-10):56-72,
https://hdl.handle.net/21.15107/rcub_ristocar_763 .

Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows

Đedović, Radica; Stanojević, Dragan; Bogdanović, Vladan; Ostojić Andrić, Dušica; Samolovac, Ljiljana; Stamenić, Tamara

(2021-08-29)

TY  - JOUR
AU  - Đedović, Radica
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Ostojić Andrić, Dušica
AU  - Samolovac, Ljiljana
AU  - Stamenić, Tamara
PY  - 2021-08-29
UR  - http://r.istocar.bg.ac.rs/handle/123456789/918
AB  - Cattle comprise a species of a domestic animal that is primarily bred for milk
production. The birth of a calf is the initiator for the lactation period and the sex of the calf can affect
milk yield. Additionally, a calf from a new pregnancy can affect the lactation from the previous
calving, since the mother gets pregnant and remains pregnant during most of the lactation, usually at
lactation peak. Therefore, the aim of this paper was to further investigate the possibilities of sexually
biased milk production of Holstein and Holstein crossbreed cows using data from the Republic of
Serbia. We also wanted to test the Trivers–Willard (TW) hypothesis that natural selection favors
unequal parental investment between daughters and sons under certain maternal conditions. At the
same time, this hypothesis assumes that mothers in good health and condition invest more in sons,
while mothers in a poor condition invest more in daughters. The obtained results deviate from the
view of the TW hypothesis because it was found that milk and fat yields in the first two lactations
were the highest in cows that had a female calf and were then pregnant with a second female calf
while the lactation from the previous calving was still in progress. We were the first in the world to
investigate the effect of the sex of calves at first and second calving on milk yield and fat yield in the
first and second standard lactation, depending on milk production levels on farms.
AB  - In order to examine the biased milk production depending on the sex of calves, data
on calving and milk yield characteristics of 15,181 Holstein type cows in PK Belgrade, Serbia were
analyzed. A total of 30,362 lactations that were realized in the period from 1985 to 2017 were analyzed.
Data were prepared and analyzed using the SAS software package (SAS Institute Inc. Software
License 9.3, 2012). The expression and variability of investigated traits were determined using the
PROC MEANS procedure, while the effect of individual factors on milk yield traits was analyzed
using the PROC GLM procedure. Obtained results deviate from the views of the Trivers–Willard (TW)
hypothesis. The results indicate that mothers invest more in female offspring by producing a higher
milk and fat yield in the first and second lactation compared to male offspring. This is especially
emphasized under better environmental conditions. The highest milk yield (7788 kg) and fat yield
(271 kg) in the second lactation were achieved in the combination with two consecutive female
calves in the group of higher-than-average milk production farms, and lowest in the combination of
two consecutive male calves (6783 kg for the MY and 243 kg for the FY), respectively.
T2  - Animals
T1  - Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows
VL  - 11
IS  - 2536
DO  - 3390/ani11092536
ER  - 
@article{
author = "Đedović, Radica and Stanojević, Dragan and Bogdanović, Vladan and Ostojić Andrić, Dušica and Samolovac, Ljiljana and Stamenić, Tamara",
year = "2021-08-29",
abstract = "Cattle comprise a species of a domestic animal that is primarily bred for milk
production. The birth of a calf is the initiator for the lactation period and the sex of the calf can affect
milk yield. Additionally, a calf from a new pregnancy can affect the lactation from the previous
calving, since the mother gets pregnant and remains pregnant during most of the lactation, usually at
lactation peak. Therefore, the aim of this paper was to further investigate the possibilities of sexually
biased milk production of Holstein and Holstein crossbreed cows using data from the Republic of
Serbia. We also wanted to test the Trivers–Willard (TW) hypothesis that natural selection favors
unequal parental investment between daughters and sons under certain maternal conditions. At the
same time, this hypothesis assumes that mothers in good health and condition invest more in sons,
while mothers in a poor condition invest more in daughters. The obtained results deviate from the
view of the TW hypothesis because it was found that milk and fat yields in the first two lactations
were the highest in cows that had a female calf and were then pregnant with a second female calf
while the lactation from the previous calving was still in progress. We were the first in the world to
investigate the effect of the sex of calves at first and second calving on milk yield and fat yield in the
first and second standard lactation, depending on milk production levels on farms., In order to examine the biased milk production depending on the sex of calves, data
on calving and milk yield characteristics of 15,181 Holstein type cows in PK Belgrade, Serbia were
analyzed. A total of 30,362 lactations that were realized in the period from 1985 to 2017 were analyzed.
Data were prepared and analyzed using the SAS software package (SAS Institute Inc. Software
License 9.3, 2012). The expression and variability of investigated traits were determined using the
PROC MEANS procedure, while the effect of individual factors on milk yield traits was analyzed
using the PROC GLM procedure. Obtained results deviate from the views of the Trivers–Willard (TW)
hypothesis. The results indicate that mothers invest more in female offspring by producing a higher
milk and fat yield in the first and second lactation compared to male offspring. This is especially
emphasized under better environmental conditions. The highest milk yield (7788 kg) and fat yield
(271 kg) in the second lactation were achieved in the combination with two consecutive female
calves in the group of higher-than-average milk production farms, and lowest in the combination of
two consecutive male calves (6783 kg for the MY and 243 kg for the FY), respectively.",
journal = "Animals",
title = "Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows",
volume = "11",
number = "2536",
doi = "3390/ani11092536"
}
Đedović, R., Stanojević, D., Bogdanović, V., Ostojić Andrić, D., Samolovac, L.,& Stamenić, T.. (2021-08-29). Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows. in Animals, 11(2536).
https://doi.org/3390/ani11092536
Đedović R, Stanojević D, Bogdanović V, Ostojić Andrić D, Samolovac L, Stamenić T. Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows. in Animals. 2021;11(2536).
doi:3390/ani11092536 .
Đedović, Radica, Stanojević, Dragan, Bogdanović, Vladan, Ostojić Andrić, Dušica, Samolovac, Ljiljana, Stamenić, Tamara, "Bias of Calf Sex on Milk Yield and Fat Yield in Holstein Crossbreed Cows" in Animals, 11, no. 2536 (2021-08-29),
https://doi.org/3390/ani11092536 . .

Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits

Đedović, Radica; Bogdanović, Vladan; Stanojević, Dragan; Ismael, Hasan; Trivunović, Snežana; Samolovac, Ljijana; Stamenić, Tamara; Janković, Dobrila

(2020-12-08)

TY  - JOUR
AU  - Đedović, Radica
AU  - Bogdanović, Vladan
AU  - Stanojević, Dragan
AU  - Ismael, Hasan
AU  - Trivunović, Snežana
AU  - Samolovac, Ljijana
AU  - Stamenić, Tamara
AU  - Janković, Dobrila
PY  - 2020-12-08
UR  - http://r.istocar.bg.ac.rs/handle/123456789/876
AB  - Data set including 10860 primiparous Holstein-Friesian breed
cows first calved in the period from 2011 to 2015, was used in determining
phenotypic variability and correlation between the traits of milk yield and linearly
estimated traits of udder and angularity. The average values obtained for type traits
(angularity, fore udder attachment, front teats placement, teats length, udder depth
and rear udder height) were 6.47; 5.74; 4.96; 5.20; 5.99 and 6.25, respectively.
The values obtained for phenotypic correlations between linear type traits and traits
of milk yield ranged from -0.042 (udder depth and milk yield) to 0.335 (fore udder
attachment and protein yield). Positive phenotypic correlation (0.293) was recorded
also between fore udder attachment and milk yield which is deemed the most
important trait of milk yield while the lowest correlation between milk yields was
determined in relation to udder depth (-0.033). The results obtained indicate a
possibility of applying direct and indirect multiple traits selection which should be
conducted within a national progeny-testing programme on Holstein-Friesian bulls
by using the method of selection indexes.
T2  - Biotechnology in Animal Husbandry
T1  - Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits
VL  - 36
IS  - 4
SP  - 407
EP  - 416
DO  - 10.2298/BAH2004407D
ER  - 
@article{
author = "Đedović, Radica and Bogdanović, Vladan and Stanojević, Dragan and Ismael, Hasan and Trivunović, Snežana and Samolovac, Ljijana and Stamenić, Tamara and Janković, Dobrila",
year = "2020-12-08",
abstract = "Data set including 10860 primiparous Holstein-Friesian breed
cows first calved in the period from 2011 to 2015, was used in determining
phenotypic variability and correlation between the traits of milk yield and linearly
estimated traits of udder and angularity. The average values obtained for type traits
(angularity, fore udder attachment, front teats placement, teats length, udder depth
and rear udder height) were 6.47; 5.74; 4.96; 5.20; 5.99 and 6.25, respectively.
The values obtained for phenotypic correlations between linear type traits and traits
of milk yield ranged from -0.042 (udder depth and milk yield) to 0.335 (fore udder
attachment and protein yield). Positive phenotypic correlation (0.293) was recorded
also between fore udder attachment and milk yield which is deemed the most
important trait of milk yield while the lowest correlation between milk yields was
determined in relation to udder depth (-0.033). The results obtained indicate a
possibility of applying direct and indirect multiple traits selection which should be
conducted within a national progeny-testing programme on Holstein-Friesian bulls
by using the method of selection indexes.",
journal = "Biotechnology in Animal Husbandry",
title = "Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits",
volume = "36",
number = "4",
pages = "407-416",
doi = "10.2298/BAH2004407D"
}
Đedović, R., Bogdanović, V., Stanojević, D., Ismael, H., Trivunović, S., Samolovac, L., Stamenić, T.,& Janković, D.. (2020-12-08). Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits. in Biotechnology in Animal Husbandry, 36(4), 407-416.
https://doi.org/10.2298/BAH2004407D
Đedović R, Bogdanović V, Stanojević D, Ismael H, Trivunović S, Samolovac L, Stamenić T, Janković D. Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits. in Biotechnology in Animal Husbandry. 2020;36(4):407-416.
doi:10.2298/BAH2004407D .
Đedović, Radica, Bogdanović, Vladan, Stanojević, Dragan, Ismael, Hasan, Trivunović, Snežana, Samolovac, Ljijana, Stamenić, Tamara, Janković, Dobrila, "Phenotypic characteristics of linear traits of udder and angularity in Holstein-Friesian cows and their correlation with milk yield traits" in Biotechnology in Animal Husbandry, 36, no. 4 (2020-12-08):407-416,
https://doi.org/10.2298/BAH2004407D . .
2

Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed

Popovac, Mladen M.; Miletić, Aleksandar; Raguž, Nikola; Beskorovajni, Radmila; Stanojević, Dragan; Radivojević, Mihailo; Mićić, Nenad; Đurić, Nenad

(2020)

TY  - JOUR
AU  - Popovac, Mladen M.
AU  - Miletić, Aleksandar
AU  - Raguž, Nikola
AU  - Beskorovajni, Radmila
AU  - Stanojević, Dragan
AU  - Radivojević, Mihailo
AU  - Mićić, Nenad
AU  - Đurić, Nenad
PY  - 2020
UR  - http://r.istocar.bg.ac.rs/handle/123456789/728
AB  - Cilj rada bio je utvrditi varijabilnost, nasljednost i povezanost tri proizvodne osobine 1409 prvotelki holštajn-frizijske pasmine; količina mlijeka tijekom laktacije (ML), količina mliječne masti tijekom laktacije (MM) i količina proteina tijekom laktacije (PR). Sukladno postavljenom cilju utvrđeno je da ML, MM i PR statistički značajno variraju (P<0,01, P<0,05, P<0,001) pod utjecajem sezone prvog teljenja i dužine trajanja prve laktacije. Također, ML i PR statistički su značajno varirali (P<0,01, P<0,001) pod utjecajem farme na kojoj su životinje uzgajane, dok su na varijabilnost MM signifikantan utjecaj (P<0.05) imali godina i starost prilikom prvog teljenja. Udio holstein gena i obrok koji su životinje dobivale nisu utjecali (P>0,05) na varijabilnost niti jedne od ispitivanih osobina, dok farma na kojoj su životinje uzgajane nije utjecala (P>0,05) na MM, a godina i starost prilikom prvog teljenja nisu imali (P>0,05)
statistički značajan utjecaj na ML i PR. Koristeći model životinje, zasnovan na upotrebi matrice srodstva koja je sadržavala 3867 životinja, REML metodologijom ocijenjeni su koeficijenti heritabiliteta za: ML h2 = 0,25; MM h2 = 0,40; PR h2 = 0,37. Utvrđeni koeficijenti genetskih i fenotipskih korelacija ukazivali su na potpunu i pozitivnu povezanost između ovih osobina, s intervalom vrijednosti od rg = 0,96 između ML i MM do rg = 1,00 između ML i PR.
AB  - The objective of this paper was to study variability, heritability and correlation of the three production traits in 1409 first-calf heifers of Holstein-Friesian breed; including the determination of the quantity of milk during lactation (ML), the quantity of milk fat during lactation (MM) and the quantity of protein during lactation (PR). According to the obtained results it could be concluded that there were statistically significant differences (P<0.01, P<0.05, P<0.001) between ML, MM and PR regarding the effect of season of the first calving and the length of the first lactation. In addition, there were also significant differences (P<0.01, P<0.001) between ML and PR with respect to the effect of farm on which animals were raised, while on MM variability the year and age at first calving had a significant effect (P<0.05). A share of Holstein genes and the ration which animals were fed had no effect (P>0.05) on variability of
any of the examined traits, while the farm on which animals were raised had no effect (P>0.05) on MM, and year and age at first calving did not demonstrate (P>0.05) statistically significant effect on ML and PR. By applying the animal model, based on the use of kinship matrix which involved 3867 animals, by help of REML methodology following heritability coefficients were evaluated: ML h2 = 0.25; MM h2 = 0.40; PR h2 = 0.37. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from rg = 0.96 between ML and MM to rg = 1.00 between ML and PR.
T2  - Mljekarstvo
T1  - Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed
VL  - 70
IS  - 2
SP  - 93
EP  - 102
DO  - 10.15567/mljekarstvo.2020.0203
ER  - 
@article{
author = "Popovac, Mladen M. and Miletić, Aleksandar and Raguž, Nikola and Beskorovajni, Radmila and Stanojević, Dragan and Radivojević, Mihailo and Mićić, Nenad and Đurić, Nenad",
year = "2020",
abstract = "Cilj rada bio je utvrditi varijabilnost, nasljednost i povezanost tri proizvodne osobine 1409 prvotelki holštajn-frizijske pasmine; količina mlijeka tijekom laktacije (ML), količina mliječne masti tijekom laktacije (MM) i količina proteina tijekom laktacije (PR). Sukladno postavljenom cilju utvrđeno je da ML, MM i PR statistički značajno variraju (P<0,01, P<0,05, P<0,001) pod utjecajem sezone prvog teljenja i dužine trajanja prve laktacije. Također, ML i PR statistički su značajno varirali (P<0,01, P<0,001) pod utjecajem farme na kojoj su životinje uzgajane, dok su na varijabilnost MM signifikantan utjecaj (P<0.05) imali godina i starost prilikom prvog teljenja. Udio holstein gena i obrok koji su životinje dobivale nisu utjecali (P>0,05) na varijabilnost niti jedne od ispitivanih osobina, dok farma na kojoj su životinje uzgajane nije utjecala (P>0,05) na MM, a godina i starost prilikom prvog teljenja nisu imali (P>0,05)
statistički značajan utjecaj na ML i PR. Koristeći model životinje, zasnovan na upotrebi matrice srodstva koja je sadržavala 3867 životinja, REML metodologijom ocijenjeni su koeficijenti heritabiliteta za: ML h2 = 0,25; MM h2 = 0,40; PR h2 = 0,37. Utvrđeni koeficijenti genetskih i fenotipskih korelacija ukazivali su na potpunu i pozitivnu povezanost između ovih osobina, s intervalom vrijednosti od rg = 0,96 između ML i MM do rg = 1,00 između ML i PR., The objective of this paper was to study variability, heritability and correlation of the three production traits in 1409 first-calf heifers of Holstein-Friesian breed; including the determination of the quantity of milk during lactation (ML), the quantity of milk fat during lactation (MM) and the quantity of protein during lactation (PR). According to the obtained results it could be concluded that there were statistically significant differences (P<0.01, P<0.05, P<0.001) between ML, MM and PR regarding the effect of season of the first calving and the length of the first lactation. In addition, there were also significant differences (P<0.01, P<0.001) between ML and PR with respect to the effect of farm on which animals were raised, while on MM variability the year and age at first calving had a significant effect (P<0.05). A share of Holstein genes and the ration which animals were fed had no effect (P>0.05) on variability of
any of the examined traits, while the farm on which animals were raised had no effect (P>0.05) on MM, and year and age at first calving did not demonstrate (P>0.05) statistically significant effect on ML and PR. By applying the animal model, based on the use of kinship matrix which involved 3867 animals, by help of REML methodology following heritability coefficients were evaluated: ML h2 = 0.25; MM h2 = 0.40; PR h2 = 0.37. Coefficients determined for genetic and phenotypic correlations indicated existence of complete and positive correlations between these traits the interval of values being from rg = 0.96 between ML and MM to rg = 1.00 between ML and PR.",
journal = "Mljekarstvo",
title = "Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed",
volume = "70",
number = "2",
pages = "93-102",
doi = "10.15567/mljekarstvo.2020.0203"
}
Popovac, M. M., Miletić, A., Raguž, N., Beskorovajni, R., Stanojević, D., Radivojević, M., Mićić, N.,& Đurić, N.. (2020). Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed. in Mljekarstvo, 70(2), 93-102.
https://doi.org/10.15567/mljekarstvo.2020.0203
Popovac MM, Miletić A, Raguž N, Beskorovajni R, Stanojević D, Radivojević M, Mićić N, Đurić N. Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed. in Mljekarstvo. 2020;70(2):93-102.
doi:10.15567/mljekarstvo.2020.0203 .
Popovac, Mladen M., Miletić, Aleksandar, Raguž, Nikola, Beskorovajni, Radmila, Stanojević, Dragan, Radivojević, Mihailo, Mićić, Nenad, Đurić, Nenad, "Phenotypic and genetic parameters of milk yield traits in first-calf heifers of Holstein-Friesian breed" in Mljekarstvo, 70, no. 2 (2020):93-102,
https://doi.org/10.15567/mljekarstvo.2020.0203 . .
1

Estimation of growth traits heritability coefficients in sheep

Zeljić Stojiljković, Krstina; Stanojević, Dragan; Bogdanović, Vladan; Mekić, Cvijan; Ružić-Muslić, Dragana; Maksimović, Nevena; Stojiljković, Nenad

(Institute for Animal Husbandry, Belgrade-Zemun, 2019)

TY  - JOUR
AU  - Zeljić Stojiljković, Krstina
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Mekić, Cvijan
AU  - Ružić-Muslić, Dragana
AU  - Maksimović, Nevena
AU  - Stojiljković, Nenad
PY  - 2019
UR  - http://r.istocar.bg.ac.rs/handle/123456789/675
AB  - The objective of this research paper was to estimate heritability coefficients (heritability) of growth traits in the lambs of indigenous Sjenicka Pramenka breed. The research was conducted on a sample which included 421 lambs the descendants of 15 sires and 187 sheep-dams, raised on 3 private farms in Kolubarski district, Serbia. The effect of fixed factors was studied while the values of heritability coefficients were estimated within the frame of SAS software package. A statistically highly significant (**=P<0.01) effect on studied traits had following parameters: sex, year of lambing, type of lambing, farm and method of applied reproductive technology. By means of REML method and using the sire model the values of heritability coefficients were determined for the following traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and average lamb body weight at 90 days (BW90) being: 0.0355; 0.4642 and 0.3018, respectively.
PB  - Institute for Animal Husbandry, Belgrade-Zemun
T2  - Biotechnology in Animal Husbandry, Belgrade
T1  - Estimation of growth traits heritability coefficients in sheep
VL  - 35
IS  - 4
SP  - 347
EP  - 355
DO  - 10.2298/BAH1904347Z
ER  - 
@article{
author = "Zeljić Stojiljković, Krstina and Stanojević, Dragan and Bogdanović, Vladan and Mekić, Cvijan and Ružić-Muslić, Dragana and Maksimović, Nevena and Stojiljković, Nenad",
year = "2019",
abstract = "The objective of this research paper was to estimate heritability coefficients (heritability) of growth traits in the lambs of indigenous Sjenicka Pramenka breed. The research was conducted on a sample which included 421 lambs the descendants of 15 sires and 187 sheep-dams, raised on 3 private farms in Kolubarski district, Serbia. The effect of fixed factors was studied while the values of heritability coefficients were estimated within the frame of SAS software package. A statistically highly significant (**=P<0.01) effect on studied traits had following parameters: sex, year of lambing, type of lambing, farm and method of applied reproductive technology. By means of REML method and using the sire model the values of heritability coefficients were determined for the following traits: average lamb birth weight (BW0), average lamb body weight at 30 days (BW30) and average lamb body weight at 90 days (BW90) being: 0.0355; 0.4642 and 0.3018, respectively.",
publisher = "Institute for Animal Husbandry, Belgrade-Zemun",
journal = "Biotechnology in Animal Husbandry, Belgrade",
title = "Estimation of growth traits heritability coefficients in sheep",
volume = "35",
number = "4",
pages = "347-355",
doi = "10.2298/BAH1904347Z"
}
Zeljić Stojiljković, K., Stanojević, D., Bogdanović, V., Mekić, C., Ružić-Muslić, D., Maksimović, N.,& Stojiljković, N.. (2019). Estimation of growth traits heritability coefficients in sheep. in Biotechnology in Animal Husbandry, Belgrade
Institute for Animal Husbandry, Belgrade-Zemun., 35(4), 347-355.
https://doi.org/10.2298/BAH1904347Z
Zeljić Stojiljković K, Stanojević D, Bogdanović V, Mekić C, Ružić-Muslić D, Maksimović N, Stojiljković N. Estimation of growth traits heritability coefficients in sheep. in Biotechnology in Animal Husbandry, Belgrade. 2019;35(4):347-355.
doi:10.2298/BAH1904347Z .
Zeljić Stojiljković, Krstina, Stanojević, Dragan, Bogdanović, Vladan, Mekić, Cvijan, Ružić-Muslić, Dragana, Maksimović, Nevena, Stojiljković, Nenad, "Estimation of growth traits heritability coefficients in sheep" in Biotechnology in Animal Husbandry, Belgrade, 35, no. 4 (2019):347-355,
https://doi.org/10.2298/BAH1904347Z . .
2

PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS

Đedović, Radica; Bogdanović, Vladan; Stanojević, Dragan; Samolovac, Ljiljana; Brka, Muhamed

(Faculty of Agricultural Sciences and Food, Skopje, 2018-10)

TY  - CONF
AU  - Đedović, Radica
AU  - Bogdanović, Vladan
AU  - Stanojević, Dragan
AU  - Samolovac, Ljiljana
AU  - Brka, Muhamed
PY  - 2018-10
UR  - http://r.istocar.bg.ac.rs/handle/123456789/924
AB  - The objective of this paper was to compare heifers reproductive traits and characteristics of their
calves after artificial insemination performed by conventional (non-sexed) and sexed sperm on 6
commercial farms in Serbia. Conception rate was 55% and 44% for conventional and sexed semen,
an average gestation length being 274.6 and 274.9 days, respectively. Average body mass at birth
was 37.47 and 36.75 kg for non-sexed and sexed semen, respectively. The rate of stillbirths and
twinning was 6.19 and 3.78% for conventional and 7.54 and 1.13% for sexed semen, respectively.
The use of conventional semen exerted no statistically significant (P>0.05) effect on female: male
calves relationship (51.96 : 48.04) while artificial insemination by sexed semen highly significantly
(P<0.01) changed calf sex-ratio (85.10 : 14.90). First-calf heifers originating from sires whose sperm
was obtained in conventional way produced 7880 kg milk with 269 kg milk fat and 242 kg protein in
standard lactation, while first-calf heifers originating from sires whose sperm was sex-sorted
produced 8184 kg milk with 251 kg milk fat and 242.3 kg protein. Type of insemination (conventional
and sexed semen) did not significantly affect the studied milk yield traits (P>0.05).
PB  - Faculty of Agricultural Sciences and Food, Skopje
C3  - Proceedings of the 3rd International Symposium for Agriculture and Food - ISAF 2017
T1  - PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS
VL  - 71
IS  - 1
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_924
ER  - 
@conference{
author = "Đedović, Radica and Bogdanović, Vladan and Stanojević, Dragan and Samolovac, Ljiljana and Brka, Muhamed",
year = "2018-10",
abstract = "The objective of this paper was to compare heifers reproductive traits and characteristics of their
calves after artificial insemination performed by conventional (non-sexed) and sexed sperm on 6
commercial farms in Serbia. Conception rate was 55% and 44% for conventional and sexed semen,
an average gestation length being 274.6 and 274.9 days, respectively. Average body mass at birth
was 37.47 and 36.75 kg for non-sexed and sexed semen, respectively. The rate of stillbirths and
twinning was 6.19 and 3.78% for conventional and 7.54 and 1.13% for sexed semen, respectively.
The use of conventional semen exerted no statistically significant (P>0.05) effect on female: male
calves relationship (51.96 : 48.04) while artificial insemination by sexed semen highly significantly
(P<0.01) changed calf sex-ratio (85.10 : 14.90). First-calf heifers originating from sires whose sperm
was obtained in conventional way produced 7880 kg milk with 269 kg milk fat and 242 kg protein in
standard lactation, while first-calf heifers originating from sires whose sperm was sex-sorted
produced 8184 kg milk with 251 kg milk fat and 242.3 kg protein. Type of insemination (conventional
and sexed semen) did not significantly affect the studied milk yield traits (P>0.05).",
publisher = "Faculty of Agricultural Sciences and Food, Skopje",
journal = "Proceedings of the 3rd International Symposium for Agriculture and Food - ISAF 2017",
title = "PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS",
volume = "71",
number = "1",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_924"
}
Đedović, R., Bogdanović, V., Stanojević, D., Samolovac, L.,& Brka, M.. (2018-10). PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS. in Proceedings of the 3rd International Symposium for Agriculture and Food - ISAF 2017
Faculty of Agricultural Sciences and Food, Skopje., 71(1).
https://hdl.handle.net/21.15107/rcub_ristocar_924
Đedović R, Bogdanović V, Stanojević D, Samolovac L, Brka M. PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS. in Proceedings of the 3rd International Symposium for Agriculture and Food - ISAF 2017. 2018;71(1).
https://hdl.handle.net/21.15107/rcub_ristocar_924 .
Đedović, Radica, Bogdanović, Vladan, Stanojević, Dragan, Samolovac, Ljiljana, Brka, Muhamed, "PHENOTYPIC VARIABILITY OF FERTILITY AND MILK TRAITS IN OFFSPRING OBTAINED BY INSEMINATION BY SEXED AND CONVENTIONAL SEMEN OF HOLSTEIN BREED BULLS" in Proceedings of the 3rd International Symposium for Agriculture and Food - ISAF 2017, 71, no. 1 (2018-10),
https://hdl.handle.net/21.15107/rcub_ristocar_924 .

GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA

Stanojević, Dragan; Đedović, Radica; Bogdanović, Vladan; Raguž, Nikola; Kučević, Denis; Popovac, Mladen; Stojić, Petar; Samolovac, Ljiljana

(2018-09)

TY  - JOUR
AU  - Stanojević, Dragan
AU  - Đedović, Radica
AU  - Bogdanović, Vladan
AU  - Raguž, Nikola
AU  - Kučević, Denis
AU  - Popovac, Mladen
AU  - Stojić, Petar
AU  - Samolovac, Ljiljana
PY  - 2018-09
UR  - http://r.istocar.bg.ac.rs/handle/123456789/917
AB  - This research was conducted with the aim оf estimating genetic trend for a functional length of productive life (FLPL) in the population of Black and White cattle in Serbia. Research and bulls genetic evaluation for functional longevity were performed on a set of data provided by Agricultural Corporation Belgrade AD (PKB) which contained data on longevity and origin of 22109 cows out of which 26% records were right-censored. Functional length of productive life (FPLP) represents a time period from the first calving to culling or censoring corrected for milk production. Breeding values were estimated using Weibull method of proportional risks within survival analysis a genetic trend for FLPL was calculated using of a regression analysis. The cows included in the analysis were on average first calved in the age of 809 days and had an average share of 81.9% genes of Holstein Friesian breed. An average length of productive life was 1267 days (41.6 months). Distribution of bull standardised breeding values did not statistically significantly differ from normal distribution. An average standardised breeding value was 99. A slightly positive genetic trend was determined, that is, the length of functional productive life was by selection increased by 0.021 day at an annual level while a reliability of estimated breeding values showed a negative trend.
T2  - Genetika
T1  - GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA
VL  - 50
IS  - 3
SP  - 855
DO  - 10.2298/GENSR1803855S
ER  - 
@article{
author = "Stanojević, Dragan and Đedović, Radica and Bogdanović, Vladan and Raguž, Nikola and Kučević, Denis and Popovac, Mladen and Stojić, Petar and Samolovac, Ljiljana",
year = "2018-09",
abstract = "This research was conducted with the aim оf estimating genetic trend for a functional length of productive life (FLPL) in the population of Black and White cattle in Serbia. Research and bulls genetic evaluation for functional longevity were performed on a set of data provided by Agricultural Corporation Belgrade AD (PKB) which contained data on longevity and origin of 22109 cows out of which 26% records were right-censored. Functional length of productive life (FPLP) represents a time period from the first calving to culling or censoring corrected for milk production. Breeding values were estimated using Weibull method of proportional risks within survival analysis a genetic trend for FLPL was calculated using of a regression analysis. The cows included in the analysis were on average first calved in the age of 809 days and had an average share of 81.9% genes of Holstein Friesian breed. An average length of productive life was 1267 days (41.6 months). Distribution of bull standardised breeding values did not statistically significantly differ from normal distribution. An average standardised breeding value was 99. A slightly positive genetic trend was determined, that is, the length of functional productive life was by selection increased by 0.021 day at an annual level while a reliability of estimated breeding values showed a negative trend.",
journal = "Genetika",
title = "GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA",
volume = "50",
number = "3",
pages = "855",
doi = "10.2298/GENSR1803855S"
}
Stanojević, D., Đedović, R., Bogdanović, V., Raguž, N., Kučević, D., Popovac, M., Stojić, P.,& Samolovac, L.. (2018-09). GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA. in Genetika, 50(3), 855.
https://doi.org/10.2298/GENSR1803855S
Stanojević D, Đedović R, Bogdanović V, Raguž N, Kučević D, Popovac M, Stojić P, Samolovac L. GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA. in Genetika. 2018;50(3):855.
doi:10.2298/GENSR1803855S .
Stanojević, Dragan, Đedović, Radica, Bogdanović, Vladan, Raguž, Nikola, Kučević, Denis, Popovac, Mladen, Stojić, Petar, Samolovac, Ljiljana, "GENETIC TREND OF FUNCTIONAL PRODUCTIVE LIFE IN THE POPULATION OF BLACK AND WHITE CATTLE IN SERBIA" in Genetika, 50, no. 3 (2018-09):855,
https://doi.org/10.2298/GENSR1803855S . .
7

Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny

Lazarević, Marina; Stanojević, Dragan; Bogdanović, Vladan; Pantelić, Vlada; Maksimović, Nevena; Marinković, Miloš; Mićić, Nenad

(Serbian Genetics Society, Belgrade, 2018)

TY  - JOUR
AU  - Lazarević, Marina
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Pantelić, Vlada
AU  - Maksimović, Nevena
AU  - Marinković, Miloš
AU  - Mićić, Nenad
PY  - 2018
UR  - http://r.istocar.bg.ac.rs/handle/123456789/567
AB  - The research was performed on Holstein-Friesian and Black and White bull dams reared on five farms of Agricultural Corporation of Belgrade - PKB. The study included 575 lactations of cows selected as bull dams and their progeny calved in the period from 2007 - 2014 and represent progeny of 24 bulls. The following dairy traits were analysed in a standard lactation (305 days): milk yield (kg) - MY, milk fat content (%) - % MF, milk fat yield (kg) - MFY, protein content (%) - % PC and protein yield (kg) - PY. Holstein-Friesian bull dams and their progeny, in standard lactation, produced on average 9239.84 +/- 1607.64 kg of milk, with a milk fat content of 3.44 +/- 0.20 and protein content of 3.21 +/- 0.12. The impact of bull - sire, year of birth, lactation order, farm, year and calving season was present at different levels of statistical significance on yield traits, while the genetic group had no influence on any of the milk traits. Bull sire, year of birth, lactation order and calving season did not influence the variability of milk fat and protein content. Heritability of observed milk traits was medium to low. The content of milk fat and protein had the lowest values of heritability, 0.014, and 0.024, respectively. The heritability of milk yield, milk fat yield and protein yield was 0.293, 0.319 and 0.273, respectively.
PB  - Serbian Genetics Society, Belgrade
T2  - Genetika-Belgrade
T1  - Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny
VL  - 50
IS  - 1
SP  - 243
EP  - 251
DO  - 10.2298/GENSR1801243L
ER  - 
@article{
author = "Lazarević, Marina and Stanojević, Dragan and Bogdanović, Vladan and Pantelić, Vlada and Maksimović, Nevena and Marinković, Miloš and Mićić, Nenad",
year = "2018",
abstract = "The research was performed on Holstein-Friesian and Black and White bull dams reared on five farms of Agricultural Corporation of Belgrade - PKB. The study included 575 lactations of cows selected as bull dams and their progeny calved in the period from 2007 - 2014 and represent progeny of 24 bulls. The following dairy traits were analysed in a standard lactation (305 days): milk yield (kg) - MY, milk fat content (%) - % MF, milk fat yield (kg) - MFY, protein content (%) - % PC and protein yield (kg) - PY. Holstein-Friesian bull dams and their progeny, in standard lactation, produced on average 9239.84 +/- 1607.64 kg of milk, with a milk fat content of 3.44 +/- 0.20 and protein content of 3.21 +/- 0.12. The impact of bull - sire, year of birth, lactation order, farm, year and calving season was present at different levels of statistical significance on yield traits, while the genetic group had no influence on any of the milk traits. Bull sire, year of birth, lactation order and calving season did not influence the variability of milk fat and protein content. Heritability of observed milk traits was medium to low. The content of milk fat and protein had the lowest values of heritability, 0.014, and 0.024, respectively. The heritability of milk yield, milk fat yield and protein yield was 0.293, 0.319 and 0.273, respectively.",
publisher = "Serbian Genetics Society, Belgrade",
journal = "Genetika-Belgrade",
title = "Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny",
volume = "50",
number = "1",
pages = "243-251",
doi = "10.2298/GENSR1801243L"
}
Lazarević, M., Stanojević, D., Bogdanović, V., Pantelić, V., Maksimović, N., Marinković, M.,& Mićić, N.. (2018). Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny. in Genetika-Belgrade
Serbian Genetics Society, Belgrade., 50(1), 243-251.
https://doi.org/10.2298/GENSR1801243L
Lazarević M, Stanojević D, Bogdanović V, Pantelić V, Maksimović N, Marinković M, Mićić N. Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny. in Genetika-Belgrade. 2018;50(1):243-251.
doi:10.2298/GENSR1801243L .
Lazarević, Marina, Stanojević, Dragan, Bogdanović, Vladan, Pantelić, Vlada, Maksimović, Nevena, Marinković, Miloš, Mićić, Nenad, "Variability and heritability of milk traits of Holstein-Frisian bull dams and their progeny" in Genetika-Belgrade, 50, no. 1 (2018):243-251,
https://doi.org/10.2298/GENSR1801243L . .

Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties

Mićić, Nenad; Marinković, Miloš; Lazarević, Marina; Pantelić, Vlada; Ostojić Andrić, Dušica; Stanojević, Dragan; Miletić, Aleksandar B.

(Serbian Association of Plant Breedings and Seed Producers, Belgrade, 2018)

TY  - JOUR
AU  - Mićić, Nenad
AU  - Marinković, Miloš
AU  - Lazarević, Marina
AU  - Pantelić, Vlada
AU  - Ostojić Andrić, Dušica
AU  - Stanojević, Dragan
AU  - Miletić, Aleksandar B.
PY  - 2018
UR  - http://r.istocar.bg.ac.rs/handle/123456789/560
AB  - The analysis included 433 daughters of 10 bulls, calving for the first time in the period from 2007 to 2014, on 6 dairy farms of the Agricultural Corporation Belgrade AD. Fixed factors included in the model were the effects of the farm, year of calving and calving season, and as a random factor the impact of the bull sire. The observed fertility properties on the basis of which breeding values were calculated were the number of days of gestation, the age at the first insemination, the service period duration and the calving interval. Bulls were ranked on the basis of these properties and using the Spearman correlation coefficient, the degree of agreement between the ranks was determined. According to the breeding values calculated by using the Best Linear Unbiased Prediction (BLUP) method, the sire 1517 was best ranked for the trait duration of service period (-34,94 days) and the calving interval (-36,14 days), relative to the average of daughters. The effects of the farm and year of calving showed no significance (p>0.05) except on the duration of the gestation. The effect of the calving season showed a very high significance (p (lt) 0.001) for the following properties: age at first insemination, duration of the service period and calving interval, as well as significance (p (lt) 0.05) for the property duration of the gestation. A statistically very significant degree of agreement between the service period and the calving interval of 0.99** (p  (lt) 0.01) was determined by the Spearman coefficient of correlation, while there was no significant difference between the other properties (p>0.05).
AB  - U analizu je uključeno 433 prvotelke, kćeri 10 bikova, prvi put oteljene u periodu od 2007. do 2014. godine, na 6 farmi krava Poljoprivredne korporacije Beograd AD. Kao fiksni faktori u modelu, uključeni su: uticaji farme, godina telenja i sezona telenja, i kao slučajan faktor uticaj bika oca. Praćene osobine plodnosti na osnovu kojih su izračunate priplodne vrednosti su: broj dana bremenitosti, uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval. Bikovi su rangirani na osnovu pomenutih osobina, a primenom Spirmanovog koeficijenta korelacije utvrđen je stepen slaganja između rangova. Prema izračunatim priplodnim vrednostima metodom najboljih linearnih objektivnih pokazatelja (Best Linear Unbiased Prediction - BLUP) utvrđeno je da je bik otac, broj 1517 je najbolje rangiran za osobine trajanje servis perioda (-34,94 dana) i međutelidbenog intervala (-36,14 dana) u odnosu na prosek kćeri.Uticaji farme i godine telenja nisu pokazali značajnost (p>0,05) samo kod osobine trajanje bremenitosti. Uticaj sezone telenja je pokazao vrlo visoku značajnost (p (lt) 0,001) za osobine: uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval, kao i značajnost (p (lt) 0,05) na osobinu trajanje bremenitosti. Spirmanovim koeficijentom korelacije utvrđen je statistički vrlo značajan stepen slaganja između trajanja servis perioda i međutelidbenog intervala (p (lt) 0,01), dok između drugih osobina nije bilo značajnosti (p>0,05).
PB  - Serbian Association of Plant Breedings and Seed Producers, Belgrade
T2  - Selekcija i semenarstvo
T1  - Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties
T1  - Procena priplodne vrednosti i rang bikova holštajn-frizijske rase na osobine plodnosti
VL  - 24
IS  - 1
SP  - 19
EP  - 26
DO  - 10.5937/SelSem1801019M
ER  - 
@article{
author = "Mićić, Nenad and Marinković, Miloš and Lazarević, Marina and Pantelić, Vlada and Ostojić Andrić, Dušica and Stanojević, Dragan and Miletić, Aleksandar B.",
year = "2018",
abstract = "The analysis included 433 daughters of 10 bulls, calving for the first time in the period from 2007 to 2014, on 6 dairy farms of the Agricultural Corporation Belgrade AD. Fixed factors included in the model were the effects of the farm, year of calving and calving season, and as a random factor the impact of the bull sire. The observed fertility properties on the basis of which breeding values were calculated were the number of days of gestation, the age at the first insemination, the service period duration and the calving interval. Bulls were ranked on the basis of these properties and using the Spearman correlation coefficient, the degree of agreement between the ranks was determined. According to the breeding values calculated by using the Best Linear Unbiased Prediction (BLUP) method, the sire 1517 was best ranked for the trait duration of service period (-34,94 days) and the calving interval (-36,14 days), relative to the average of daughters. The effects of the farm and year of calving showed no significance (p>0.05) except on the duration of the gestation. The effect of the calving season showed a very high significance (p (lt) 0.001) for the following properties: age at first insemination, duration of the service period and calving interval, as well as significance (p (lt) 0.05) for the property duration of the gestation. A statistically very significant degree of agreement between the service period and the calving interval of 0.99** (p  (lt) 0.01) was determined by the Spearman coefficient of correlation, while there was no significant difference between the other properties (p>0.05)., U analizu je uključeno 433 prvotelke, kćeri 10 bikova, prvi put oteljene u periodu od 2007. do 2014. godine, na 6 farmi krava Poljoprivredne korporacije Beograd AD. Kao fiksni faktori u modelu, uključeni su: uticaji farme, godina telenja i sezona telenja, i kao slučajan faktor uticaj bika oca. Praćene osobine plodnosti na osnovu kojih su izračunate priplodne vrednosti su: broj dana bremenitosti, uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval. Bikovi su rangirani na osnovu pomenutih osobina, a primenom Spirmanovog koeficijenta korelacije utvrđen je stepen slaganja između rangova. Prema izračunatim priplodnim vrednostima metodom najboljih linearnih objektivnih pokazatelja (Best Linear Unbiased Prediction - BLUP) utvrđeno je da je bik otac, broj 1517 je najbolje rangiran za osobine trajanje servis perioda (-34,94 dana) i međutelidbenog intervala (-36,14 dana) u odnosu na prosek kćeri.Uticaji farme i godine telenja nisu pokazali značajnost (p>0,05) samo kod osobine trajanje bremenitosti. Uticaj sezone telenja je pokazao vrlo visoku značajnost (p (lt) 0,001) za osobine: uzrast pri prvom osemenjavanju, dužina servis perioda i međutelidbeni interval, kao i značajnost (p (lt) 0,05) na osobinu trajanje bremenitosti. Spirmanovim koeficijentom korelacije utvrđen je statistički vrlo značajan stepen slaganja između trajanja servis perioda i međutelidbenog intervala (p (lt) 0,01), dok između drugih osobina nije bilo značajnosti (p>0,05).",
publisher = "Serbian Association of Plant Breedings and Seed Producers, Belgrade",
journal = "Selekcija i semenarstvo",
title = "Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties, Procena priplodne vrednosti i rang bikova holštajn-frizijske rase na osobine plodnosti",
volume = "24",
number = "1",
pages = "19-26",
doi = "10.5937/SelSem1801019M"
}
Mićić, N., Marinković, M., Lazarević, M., Pantelić, V., Ostojić Andrić, D., Stanojević, D.,& Miletić, A. B.. (2018). Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties. in Selekcija i semenarstvo
Serbian Association of Plant Breedings and Seed Producers, Belgrade., 24(1), 19-26.
https://doi.org/10.5937/SelSem1801019M
Mićić N, Marinković M, Lazarević M, Pantelić V, Ostojić Andrić D, Stanojević D, Miletić AB. Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties. in Selekcija i semenarstvo. 2018;24(1):19-26.
doi:10.5937/SelSem1801019M .
Mićić, Nenad, Marinković, Miloš, Lazarević, Marina, Pantelić, Vlada, Ostojić Andrić, Dušica, Stanojević, Dragan, Miletić, Aleksandar B., "Estimation of the breeding value and ranking of Holstein-Friesian bulls on fertility properties" in Selekcija i semenarstvo, 24, no. 1 (2018):19-26,
https://doi.org/10.5937/SelSem1801019M . .

VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS

Lazarević, Marina; Pantelić, Vlada; Nikšić, Dragan; Maksimović, Nevena; Marinković, Miloš; Mićić, Nenad; Stanojević, Dragan

(Institute for Animal Husbandry, Belgrade-Zemun, 2017)

TY  - CONF
AU  - Lazarević, Marina
AU  - Pantelić, Vlada
AU  - Nikšić, Dragan
AU  - Maksimović, Nevena
AU  - Marinković, Miloš
AU  - Mićić, Nenad
AU  - Stanojević, Dragan
PY  - 2017
UR  - http://r.istocar.bg.ac.rs/handle/123456789/697
AB  - The data of the Institute for Animal Husbandry, Belgrade-Zemun have been used to investigate the variability of the properties that are observed in the progeny testing of Simmental bulls. The analysis is based on a sample of 7,845 first-calving heifers in the period 2007-2010. The tests included the following milk properties in the standard first lactation (305 days): milk yield (kg), milk fat content (%) and milk fat yield (kg). An analysis of the production traits of the first-calving heifers under control showed that their average milk yield was 4346.49 kg milk with 3.93% milk fat and yield of 171.11 kg of milk fat. Sires, years and calving season exhibited a highly significant impact (p<0.01) on all the milk properties observed in the progeny testing. Based on the BLUP solution, the rank of bulls for each trait was formed, and then the correlation coefficients of the rank, ranging from 0.402 (relationship between the yield of milk and milk fat content) to 0.989 (the relationship between the yield of milk and the yield of milk fat) were established.
PB  - Institute for Animal Husbandry, Belgrade-Zemun
C3  - Proceedings of the 11th International Symposium Modern Trends in Livestock Production, Belgrade, Serbia, October 11-13, 2017
T1  - VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS
SP  - 417
EP  - 426
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_697
ER  - 
@conference{
author = "Lazarević, Marina and Pantelić, Vlada and Nikšić, Dragan and Maksimović, Nevena and Marinković, Miloš and Mićić, Nenad and Stanojević, Dragan",
year = "2017",
abstract = "The data of the Institute for Animal Husbandry, Belgrade-Zemun have been used to investigate the variability of the properties that are observed in the progeny testing of Simmental bulls. The analysis is based on a sample of 7,845 first-calving heifers in the period 2007-2010. The tests included the following milk properties in the standard first lactation (305 days): milk yield (kg), milk fat content (%) and milk fat yield (kg). An analysis of the production traits of the first-calving heifers under control showed that their average milk yield was 4346.49 kg milk with 3.93% milk fat and yield of 171.11 kg of milk fat. Sires, years and calving season exhibited a highly significant impact (p<0.01) on all the milk properties observed in the progeny testing. Based on the BLUP solution, the rank of bulls for each trait was formed, and then the correlation coefficients of the rank, ranging from 0.402 (relationship between the yield of milk and milk fat content) to 0.989 (the relationship between the yield of milk and the yield of milk fat) were established.",
publisher = "Institute for Animal Husbandry, Belgrade-Zemun",
journal = "Proceedings of the 11th International Symposium Modern Trends in Livestock Production, Belgrade, Serbia, October 11-13, 2017",
title = "VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS",
pages = "417-426",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_697"
}
Lazarević, M., Pantelić, V., Nikšić, D., Maksimović, N., Marinković, M., Mićić, N.,& Stanojević, D.. (2017). VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS. in Proceedings of the 11th International Symposium Modern Trends in Livestock Production, Belgrade, Serbia, October 11-13, 2017
Institute for Animal Husbandry, Belgrade-Zemun., 417-426.
https://hdl.handle.net/21.15107/rcub_ristocar_697
Lazarević M, Pantelić V, Nikšić D, Maksimović N, Marinković M, Mićić N, Stanojević D. VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS. in Proceedings of the 11th International Symposium Modern Trends in Livestock Production, Belgrade, Serbia, October 11-13, 2017. 2017;:417-426.
https://hdl.handle.net/21.15107/rcub_ristocar_697 .
Lazarević, Marina, Pantelić, Vlada, Nikšić, Dragan, Maksimović, Nevena, Marinković, Miloš, Mićić, Nenad, Stanojević, Dragan, "VARIABILITY OF MILK TRAITS IN PROGENY TESTING OF THE SIMMENTAL BULLS" in Proceedings of the 11th International Symposium Modern Trends in Livestock Production, Belgrade, Serbia, October 11-13, 2017 (2017):417-426,
https://hdl.handle.net/21.15107/rcub_ristocar_697 .

HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING

Lazarević, Marina; Nikšić, Dragan; Ostojić Andrić, Dušica; Pantelić, Vlada; Maksimović, Nevena; Stanišić, Nikola; Stanojević, Dragan; Mićić, Nenad

(Institute for Animal Husbandry, Belgrade-Zemun, 2015)

TY  - CONF
AU  - Lazarević, Marina
AU  - Nikšić, Dragan
AU  - Ostojić Andrić, Dušica
AU  - Pantelić, Vlada
AU  - Maksimović, Nevena
AU  - Stanišić, Nikola
AU  - Stanojević, Dragan
AU  - Mićić, Nenad
PY  - 2015
UR  - http://r.istocar.bg.ac.rs/handle/123456789/694
AB  - To test the variability of fertility traits of Holstein-Friesian bulls monitored in progeny test, reproduction data of 342 cows, daughters of 15 bulls were used. Cows have been in production in seven farms of Agricultural Corporation "Belgrade" in the period from 2004 to 2012. The study included the following fertility traits: the average calving age, service period and calving interval. To analyze the influence of genetic and non-genetic sources of variability a mixed model with random effect of bull - sire, the fixed effects of farm, year, season and order of calving was used. The sire is present in variability of all the observed fertility traits (p <0.01), whereas the fixed factors manifested their influence at different levels of statistical significance. The heritability of fertility traits was low: the average calving age – 0.224, service period – 0.087, calving interval – 0.085. Repeatability of mentioned traits was 0.258, 0.111, 0.102, respectively.
PB  - Institute for Animal Husbandry, Belgrade-Zemun
C3  - Proceedings of the 4th International Congress "New Perspectives and Challenges of Sustainable Livestock Production", Belgrade, Serbia, October 7-9, 2015
T1  - HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING
SP  - 520
EP  - 529
UR  - https://hdl.handle.net/21.15107/rcub_ristocar_694
ER  - 
@conference{
author = "Lazarević, Marina and Nikšić, Dragan and Ostojić Andrić, Dušica and Pantelić, Vlada and Maksimović, Nevena and Stanišić, Nikola and Stanojević, Dragan and Mićić, Nenad",
year = "2015",
abstract = "To test the variability of fertility traits of Holstein-Friesian bulls monitored in progeny test, reproduction data of 342 cows, daughters of 15 bulls were used. Cows have been in production in seven farms of Agricultural Corporation "Belgrade" in the period from 2004 to 2012. The study included the following fertility traits: the average calving age, service period and calving interval. To analyze the influence of genetic and non-genetic sources of variability a mixed model with random effect of bull - sire, the fixed effects of farm, year, season and order of calving was used. The sire is present in variability of all the observed fertility traits (p <0.01), whereas the fixed factors manifested their influence at different levels of statistical significance. The heritability of fertility traits was low: the average calving age – 0.224, service period – 0.087, calving interval – 0.085. Repeatability of mentioned traits was 0.258, 0.111, 0.102, respectively.",
publisher = "Institute for Animal Husbandry, Belgrade-Zemun",
journal = "Proceedings of the 4th International Congress "New Perspectives and Challenges of Sustainable Livestock Production", Belgrade, Serbia, October 7-9, 2015",
title = "HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING",
pages = "520-529",
url = "https://hdl.handle.net/21.15107/rcub_ristocar_694"
}
Lazarević, M., Nikšić, D., Ostojić Andrić, D., Pantelić, V., Maksimović, N., Stanišić, N., Stanojević, D.,& Mićić, N.. (2015). HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING. in Proceedings of the 4th International Congress "New Perspectives and Challenges of Sustainable Livestock Production", Belgrade, Serbia, October 7-9, 2015
Institute for Animal Husbandry, Belgrade-Zemun., 520-529.
https://hdl.handle.net/21.15107/rcub_ristocar_694
Lazarević M, Nikšić D, Ostojić Andrić D, Pantelić V, Maksimović N, Stanišić N, Stanojević D, Mićić N. HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING. in Proceedings of the 4th International Congress "New Perspectives and Challenges of Sustainable Livestock Production", Belgrade, Serbia, October 7-9, 2015. 2015;:520-529.
https://hdl.handle.net/21.15107/rcub_ristocar_694 .
Lazarević, Marina, Nikšić, Dragan, Ostojić Andrić, Dušica, Pantelić, Vlada, Maksimović, Nevena, Stanišić, Nikola, Stanojević, Dragan, Mićić, Nenad, "HERITABILITY AND REPEATABILITY OF FERTILITY TRAITS OF HOLSTEIN-FRIESIAN BULLS MONITORED IN PROGENY TESTING" in Proceedings of the 4th International Congress "New Perspectives and Challenges of Sustainable Livestock Production", Belgrade, Serbia, October 7-9, 2015 (2015):520-529,
https://hdl.handle.net/21.15107/rcub_ristocar_694 .

The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production

Popovac, Mladen M.; Radojković, Dragan D.; Petrović, Milica D.; Gogić, Marija; Stanojević, Dragan Ž.; Stanišić, Nikola; Miletić, Aleksandar B.

(Poljoprivredni fakultet, Beograd, 2014)

TY  - JOUR
AU  - Popovac, Mladen M.
AU  - Radojković, Dragan D.
AU  - Petrović, Milica D.
AU  - Gogić, Marija
AU  - Stanojević, Dragan Ž.
AU  - Stanišić, Nikola
AU  - Miletić, Aleksandar B.
PY  - 2014
UR  - http://r.istocar.bg.ac.rs/handle/123456789/433
AB  - The aim of this study was to evaluate the chemical composition of the back fat tissue of mangalitsa pig and meaty pig breeds and their crosses, and the pigs that were fed with feed that was enriched or unenriched with oil, from the aspect of the production of biodiesel, where the starting material for the fuel would be the fat tissue of pigs. By examining the impact of breed and oil content in feed, it was found that chemical parameters (fat, water, protein, saturated and unsaturated fatty acids) show statistically significant variation under the influence of these factors. The highest fat content (89.39%), which is essential for conversion of fat into biodiesel, was found in back adipose tissue of mangalitsa breed, while the lowest fat content (86.10%) was found in the back fat tissue of meaty breeds and their crosses. Favorable ratio of saturated to unsaturated fatty acids (37.92% : 62.07%), on which some physical properties of the fuel depend, was found in the back fat tissue of pigs that were fed with feed enriched with oil, and the largest proportion of saturated fatty acids, i.e. the most unfavorable fatty acid composition (40.90% : 59.09%) was found in the back fat tissues of pigs that were fed with feed unenriched with oil. The lowest content of saturated fatty acids and water (7.44%), as the key factors that determine the cetane number of the fuel and the fuel production process, indicates that the most suitable raw material for the production of biodiesel is the fat tissue of pigs that were fed with food that contained a certain amount of oil.
AB  - Cilj rada bio je da se ispita hemijski sastav leđnog masnog tkiva svinja rase mangulica i plemenitih mesnatih rasa i njihovih meleza, kao i svinja koje su hranjene hranom obogaćenom ili neobogaćenom uljem, a sve sa aspekta proizvodnje biodizela gde bi polazna sirovina za ovo gorivo bilo masno tkivo svinja. Ispitujući uticaj rase i sadržaja ulja u hrani ustanovljeno je statistički značajno variranje hemijskih karakteristika masnog tkiva svinja (sadržaja masti, vode, proteina, zasićenih i nezasićenih masnih kiselina) pod uticajem ovih faktora. Najveći sadržaj masti (89,39%) koji je ključni faktor konverzije sirovine u biodizel utvrđen je u leđnom masnom tkivu rase mangulica dok je najmanji sadržaj masti (86,10%) utvrđen u leđnoj slanini plemenitih mesnatih rasa i njihovih meleza. Najpovoljniji odnos zasićenih i nezasićenih masnih kiselina (37,92% : 62,07%) koje uslovljavaju neke fizičke osobine goriva utvrđen je u leđnoj slanini grla čija je hrana bila obogaćena uljem, a najveći udeo zasićenih masnih kiselina, odnosno najnepovoljniji masnokiselinski sastav (40,90% : 59,09%) utvrđen je u masnom tkivu grla koja su dobijala hranu siromašnu uljem. Najmanji sadržaj zasićenih masnih kiselina i vode (7,44%) kao ključnih faktora od kojih zavise cetanski broj i proces proizvodnje goriva ukazuje da je najpogodnija sirovina za proizvodnju biodizela masno tkivo grla čija je hrana sadržala određenu količinu ulja.
PB  - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences
T1  - The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production
T1  - Uticaj rase i načina ishrane na hemijski sastav leđnog masnog tkiva svinja kao potencijalne sirovine za biodizel
VL  - 59
IS  - 2
SP  - 141
EP  - 150
DO  - 10.2298/jas1402141p
ER  - 
@article{
author = "Popovac, Mladen M. and Radojković, Dragan D. and Petrović, Milica D. and Gogić, Marija and Stanojević, Dragan Ž. and Stanišić, Nikola and Miletić, Aleksandar B.",
year = "2014",
abstract = "The aim of this study was to evaluate the chemical composition of the back fat tissue of mangalitsa pig and meaty pig breeds and their crosses, and the pigs that were fed with feed that was enriched or unenriched with oil, from the aspect of the production of biodiesel, where the starting material for the fuel would be the fat tissue of pigs. By examining the impact of breed and oil content in feed, it was found that chemical parameters (fat, water, protein, saturated and unsaturated fatty acids) show statistically significant variation under the influence of these factors. The highest fat content (89.39%), which is essential for conversion of fat into biodiesel, was found in back adipose tissue of mangalitsa breed, while the lowest fat content (86.10%) was found in the back fat tissue of meaty breeds and their crosses. Favorable ratio of saturated to unsaturated fatty acids (37.92% : 62.07%), on which some physical properties of the fuel depend, was found in the back fat tissue of pigs that were fed with feed enriched with oil, and the largest proportion of saturated fatty acids, i.e. the most unfavorable fatty acid composition (40.90% : 59.09%) was found in the back fat tissues of pigs that were fed with feed unenriched with oil. The lowest content of saturated fatty acids and water (7.44%), as the key factors that determine the cetane number of the fuel and the fuel production process, indicates that the most suitable raw material for the production of biodiesel is the fat tissue of pigs that were fed with food that contained a certain amount of oil., Cilj rada bio je da se ispita hemijski sastav leđnog masnog tkiva svinja rase mangulica i plemenitih mesnatih rasa i njihovih meleza, kao i svinja koje su hranjene hranom obogaćenom ili neobogaćenom uljem, a sve sa aspekta proizvodnje biodizela gde bi polazna sirovina za ovo gorivo bilo masno tkivo svinja. Ispitujući uticaj rase i sadržaja ulja u hrani ustanovljeno je statistički značajno variranje hemijskih karakteristika masnog tkiva svinja (sadržaja masti, vode, proteina, zasićenih i nezasićenih masnih kiselina) pod uticajem ovih faktora. Najveći sadržaj masti (89,39%) koji je ključni faktor konverzije sirovine u biodizel utvrđen je u leđnom masnom tkivu rase mangulica dok je najmanji sadržaj masti (86,10%) utvrđen u leđnoj slanini plemenitih mesnatih rasa i njihovih meleza. Najpovoljniji odnos zasićenih i nezasićenih masnih kiselina (37,92% : 62,07%) koje uslovljavaju neke fizičke osobine goriva utvrđen je u leđnoj slanini grla čija je hrana bila obogaćena uljem, a najveći udeo zasićenih masnih kiselina, odnosno najnepovoljniji masnokiselinski sastav (40,90% : 59,09%) utvrđen je u masnom tkivu grla koja su dobijala hranu siromašnu uljem. Najmanji sadržaj zasićenih masnih kiselina i vode (7,44%) kao ključnih faktora od kojih zavise cetanski broj i proces proizvodnje goriva ukazuje da je najpogodnija sirovina za proizvodnju biodizela masno tkivo grla čija je hrana sadržala određenu količinu ulja.",
publisher = "Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences",
title = "The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production, Uticaj rase i načina ishrane na hemijski sastav leđnog masnog tkiva svinja kao potencijalne sirovine za biodizel",
volume = "59",
number = "2",
pages = "141-150",
doi = "10.2298/jas1402141p"
}
Popovac, M. M., Radojković, D. D., Petrović, M. D., Gogić, M., Stanojević, D. Ž., Stanišić, N.,& Miletić, A. B.. (2014). The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production. in Journal of Agricultural Sciences
Poljoprivredni fakultet, Beograd., 59(2), 141-150.
https://doi.org/10.2298/jas1402141p
Popovac MM, Radojković DD, Petrović MD, Gogić M, Stanojević DŽ, Stanišić N, Miletić AB. The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production. in Journal of Agricultural Sciences. 2014;59(2):141-150.
doi:10.2298/jas1402141p .
Popovac, Mladen M., Radojković, Dragan D., Petrović, Milica D., Gogić, Marija, Stanojević, Dragan Ž., Stanišić, Nikola, Miletić, Aleksandar B., "The effects of breed and feeding regime on the chemical composition of pig back fat as a potential raw material for biodiesel production" in Journal of Agricultural Sciences, 59, no. 2 (2014):141-150,
https://doi.org/10.2298/jas1402141p . .