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Full-Text Articles in Life Sciences
Stress And Reproductive Hormones In Grizzly Bears Reflect Nutritional Benefits And Social Consequences Of A Salmon Foraging Niche, Heather M. Bryan, Chris T. Darimont, Paul C. Paquet, Katherine E. Wynne-Edwards, Judit E. G. Smits
Stress And Reproductive Hormones In Grizzly Bears Reflect Nutritional Benefits And Social Consequences Of A Salmon Foraging Niche, Heather M. Bryan, Chris T. Darimont, Paul C. Paquet, Katherine E. Wynne-Edwards, Judit E. G. Smits
Physiology Collection
Physiological indicators of social and nutritional stress can provide insight into the responses of species to changes in food availability. In coastal British Columbia, Canada, grizzly bears evolved with spawning salmon as an abundant but spatially and temporally constrained food source. Recent and dramatic declines in salmon might have negative consequences on bear health and ultimately fitness. To examine broadly the chronic endocrine effects of a salmon niche, we compared cortisol, progesterone, and testosterone levels in hair from salmon-eating bears from coastal BC (n = 75) with the levels in a reference population from interior BC lacking access to salmon …
General Reproductive Properties In Pigs, İrfan Tur
General Reproductive Properties In Pigs, İrfan Tur
Turkish Journal of Veterinary & Animal Sciences
Pig breeding is usually undertaken for fat and meat production, but different sectors (cosmetics industry, pharmaceutical industry, medical sector, etc.) can also use pigs for alternate purposes. Pork is evaluated based on the status of an amended law regarding butchers' meat in Turkey. There have been 25 pig farms registered in Turkey since 7 July 2006 in the framework of compliance with the European Union. On average, a sow has 2.3 farrowings per year, producing 9.5 to 12.5 piglets per litter. It is important that high proportions of selected replacement gilts reach puberty at an early age in order to …
The Effect Of Selenized Yeast Supplementation On Some Performance Parameters In Sheep, Bogumila Pilarczyk, Agnieszka Tomza-Marciniak, Zbigniew Dobrzanski, Malgorzata Szewczuk, Tomasz Stankiewicz, Dariusz Gaczarzewicz, Wlodzimierz Lachowski
The Effect Of Selenized Yeast Supplementation On Some Performance Parameters In Sheep, Bogumila Pilarczyk, Agnieszka Tomza-Marciniak, Zbigniew Dobrzanski, Malgorzata Szewczuk, Tomasz Stankiewicz, Dariusz Gaczarzewicz, Wlodzimierz Lachowski
Turkish Journal of Veterinary & Animal Sciences
The aim of this study was to determine the levels of serum selenium in coarse-haired Pomeranian sheep and to evaluate the effect of the oral supplementation of selenized yeast on selected performance parameters in such sheep. The sheep were divided into 2 groups, with 53 ewes forming the experimental group and 34 ewes forming the control group. The concentration of serum selenium in all 87 sheep from the 2 groups was analyzed. The sheep in the experimental group received selenized yeast for the 3 days before and 3 days after mating (1 g preparation/animal daily, with 1 g of preparation …