Sentence examples for engage in copulation from inspiring English sources

Although some species can reproduce asexually by splitting in two, most engage in copulation.

In the nonbreeding seasons, the hormone levels drop so that the animals are not capable of fertilized breeding and do not have the desire to engage in copulation.

Typically, males in the absence of ethanol vigorously court virgin females and readily engage in copulation that lasts approximately 20 min [32].

This concern seems unjustified since: (1) It was usually possible to judge from signs of female responsiveness within the first half minute of a trial whether females would engage in copulation or not.

I measured baseline male song rate and female sexual responsiveness (i.e. the general readiness of females to engage in copulation) as individual characteristics (experiment 1), and male attractiveness and female mating preferences in choice tests (experiment 2) before conducting the extra-pair mating trials (experiment 3).

Our finding of an inability of hybrid males to transfer sperm into females, despite being able to properly engage in copulation for periods of times that should allow the proper transfer of sperm, suggests that sterility is primarily a consequence of a postmating prezygotic problem, but not a spermatogenic defect.

This experimental design allows us to test experimentally whether males are more or less willing to engage in copulations under varying conditions of sperm competition risk, as well as whether they adjust their ejaculates as predicted by current sperm competition theory (Parker 1998; Wedell et al. 2002; Parker and Pizzari 2010).

Following previous studies, we considered the end of the dawn chorus to be when the female emerged from the nest and engaged in copulation behaviour with the male [23], [30], [31].

Extra-pair fertilizations, which can result from females engaging in copulations with extra-pair males (extrapair paternity; EPP), or from males copulating with extra-pair females that lay eggs in the male's nest (extra-pair maternity; EPM or quasi-parasitism, QP) [1], is known from approximately 90% of the avian species (see [2]).

Other menstruating primates, some of the menstruating bat species, and the elephant shrew all engage in extended copulation. .

Each year in Colorado, queens and males of these ants make their way to hilltops where they engage in unbridled copulation.