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Effect of melatonin on the reproductive characteristics of rams of north east Bulgarian fine fleece breed
(Publ House Bulgarian Acad Sci, Sofia, 2014)
Some ruminant species, including sheep, show a markedly seasonal breeding cycle. There is evidence for the practical use of the pineal hormone melatonin to improve reproduction in sheep but the mechanism of action of the ...
Effect of supplementation with inorganic and organic selenium on sperm quality and quantity in North-East Bulgarian merino rams / Uticaj dodavanja neorganskog i organskog selena na kvalitet i količinu sperme ovnova severoistočne bugarske merino rase
(Institute for Animal Husbandry, Belgrade, 2018)
Selenium is a trace element, which stimulates antioxidant defenses and improves reproductive functions in human and animals, under the form of selenoproteins. The objective of the study was to evaluate the effect of selenium, ...
Study of the relationship between sperm parameters and the activity of creatine kinase in the process of cryopreservation
(Faculty of Biology, Sofia University, Bulgaria, 11-2021)
The aim of the present study was to determine a possible relationship between sperm
parameters and activity of creatinine kinase (CK) in the process of cryopreservation.
To achieve this goal, 14 ejaculates of 7 rams of ...
Seasonal variations in enzyme activity in Ovies aries seminal plasma
(Book of abstracts of National Scientific conference "75 years Institute of Neurobilogy" 15-16.december, Sofia, Bulgaria, 12-2022)
Sheep (Ovies aries) are mainly seasonal polycyclic animals. Sperm production is influenced by many factors, including daylight length, climate temperature, humidity, and melatonin secretion, with females becoming fertile ...
Analysis of vitality and biochemical parameters in freeze-thawed seminal plasma of rams
(Institute for Animal Husbandry, Belgrade-Zemun, Serbia, 2022)
The current study aimed to examine the percentage changes of
viability sperm and the activity of the enzymes LDH, ALP, GOT / AST, GPT /
ALT in the sperm plasma of Lacaune rams, before and after cryopreservation. For
this ...
Influence of some factors on fertility and weight if sheep and body weight development of lambs / Uticaj nekih faktora na plodnost i masu ovaca i telesni razvoj jagnjadi
(Institute for Animal Husbandry, Belgrade-Zemun, Serbia, 12-2022)
The research included a total of 921 lambs, 474 ewes and 8
sjenicke sheep rams from 4 different farms. The aim of the research was to
examine the influence of the farm, cultivation technology and the influence of ...
Study of the effects of low temperatures on the morphological status of ram spermatozoa
(Institute for Animal Husbandry, Belgrade-Zemun, 2019)
The aim of the study was to evaluate how the process of cryopreservation influenced the morphological status of ram sperm. The experiment was carried out with 26 sexually matured, pure bred rams ...