Sentences with phrase «mating access to females»

Decades of behavioral research on the lizard's mating systems have resulted in near - unanimous agreement among scientists that the males maintain restricted, static territories to defend exclusive mating access to females within these territories and are consequently polygamous.

Not exact matches

The study, led by Dr Allan Debelle and Dr Rhonda Snook in the University's Department of Animal and Plant Sciences, looked at the mating patterns of fruit flies after they evolved for 100 generations in either polyandrous populations (where several males have to compete for a single female) and monogamous populations (where each male has access to only one female).

Males of many animal species compete for mates, either by producing showy ornaments to attract females, such as the plumes and bright colours of male Birds of Paradise, or, like stags and elephant seals, by fighting with other males for access to mates.

In these cases, females must compete for access to available mates, and indeed, researchers have found secondary sex traits, such as brightly colored ornamentation, evolving in female pipefish instead of males.

When a female worm mates with multiple males, the sperm jostle each other, competing for access to the eggs.

Normal increases in vocalization occur during mating season when female cats are in heat and male cats compete for access to them.

In the majority of Mammal species female breeding success is strongly constrained by the investment in gestation and lactation, while males have a marginal role in offspring rearing, and, therefore, are free to put in place a wide array of tactics and strategies to increase access to mates Elephant seals are probably one of the most extreme example of this tendency.