Does reduced heterozygosity depress sperm quality in wild rabbits (Oryctolagus cuniculus)?

and appreciation of the underlying mental processes. It is also the case that some of the most relevant problems encountered by primates possess both a social and an ecological dimension, which are often intrinsically entangled. For example, avoiding predation depends on an individual's ability to predict a predator's behaviour as well as on its social skills in gaining the anti-predator benefits generated by group-life, and learning complex skills depends on tapping the accumulated skill base of other group members. Empirically sorting out the relative contribution of these different evolutionary forces is no trivial undertaking. Finally, the vast majority of empirical research on social cognition has been conducted with primates, probably because researchers interested in these questions prefer to work with phylogenetically close relatives. However, there is no reason to assume that the same principles and evolutionary pressures have not acted on other groups of animals, and that some non-primate species possess comparable social intelligence. The current literature is consistent with the idea that natural selection does not need a primate brain to endow it with social intelligence. An important challenge for the future, thus, will be to determine in what ways other groups of animals, such as corvids or social carnivores, are similar to or differ from primates in their social intelligence or in the underlying motivation to display it. Rhesus macaques (Macaca mulatta) categorize unknown conspecifics according to their dominance relations. and hormonal responses to predation in female chacma baboons (Papio hamadryas ursinus). signalling in non-human primates: cognitive precursors and limitations for the evolution of language. Adv. Stud.