Figure 1: The relationship between the age of the mother on the date of conception and the tenure of the father. Figure 3: The influence of the number of young female clan members at clan selection on ...

Trivers (1972) proposed that females may choose to mate with males of high sexual competence (the ability to supply sufficient sperm for fertilisation). This hypothesis was tested by allowing ewes in ...

When female sheep get the choice, they would rather mate with a subordinate male than a dominant one. Dominant rams usually mate with ewes much more often than lower-ranking rams do. But they can ...

AbstractThe extent and importance of female mate fidelity in polygynous mating systems are poorly known. Fidelity may contribute to high variance in male reproductive success when it favors attractive ...