A team of scientists from Texas A&M University and the University of Glasgow Veterinary School in Scotland has discovered that naturally occurring endogenous retroviruses are required for pregnancy in ...

The regulation of seasonal reproduction in sheep is intricately linked to the actions of melatonin, a hormone whose secretion varies with the photoperiod. Central to this process are the melatonin ...

BOISE (CN) - A federal sheep experiment in Idaho threatens the teetering population of Yellowstone grizzly bears, environmentalists claim in court. The U.S. Sheep Experiment Station (USSES), ...

In Australia only 5 per cent of sheep are bred using artificial insemination New research hopes to increase the conception rates in ewes from frozen sperm The anatomy of the sheep's reproductive ...

1. Fitness costs of reproduction are expected when resources are limited. Costs drive the evolution of life-history strategies and can affect population dynamics if females change their allocation of ...

High temperatures during critical periods of the reproductive cycle of sheep result in 2.1 million fewer lambs produced in Australia each year, costing sheep farmers an estimated $97 million annually.

On the Scottish archipelago of St. Kilda, the Soay sheep may not have any natural predators, but they do have the elements to contend with: a lack of food, brutal weather that can kill off half the ...

Researchers from the University of Sheffield, as part of an international team, have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly ...

image: The study on the remains of animals found at the site of the Chaves cave in Huesca, led by the Universitat Autònoma de Barcelona, obtains new data on the control of breeding and feeding of the ...