This is a preview. Log in through your library . Abstract A central theme in life history theory is to determine how reproduction varies with age in iteroparous organisms. Evidence of ageing and ...

Researchers have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly contradicting Darwin's evolutionary theory. Researchers from the University ...

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 ...

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 ...

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.