By contrast, Neat1 KO mice frequently copulated at an interval of 3 or 4 days (Fig. 1J).
This species is polygynous, and dominant 'alpha' males perform most copulations at a colony (although subordinate males apparently are able to copulate with some females, presumably away from the colony and the presence of the alpha male).
It fulfills our criterion that Ore-R flies copulate at 100% efficiency within 5 minutes in single-choice assays in daylight.
Since many factors (e.g. age, injury, health, copulation activity, nutritional status) can cause temporal infertility or reduced fertility in males (Sheldon 1994; Hasson and Stone 2009), the frequency of male functional infertility may be sufficient for females to benefit from copulating at least once with an extra pair male before she starts egg laying.
As in experiment 1, each pair was given 24h for mating to take place and any pairs still copulating at the end of this period were separated using a paintbrush.
The males of many species of domestic mammals, however, seem to be capable of copulating at almost any time of the year.
So, on many levels they were the opposite of the trope, but for whatever reason, by proxy their tête-à-tête brought up the disquieting reality of sexual power politics involving oriental service providers bewitched by Occidentalism catering to equally besotted Occidental Orientalists meeting and copulating at the raw frontier of transactional mutual wish-fulfillment.
For 17 males that copulated at least once and masturbated during female oestrus, I calculated the percent of his masturbations that occurred before the first copulation, between copulations, and after the last copulation.
However, deaf males, which cannot detect female song, still copulated at WT rates when paired with WT females.
This last effect can be attributed to sexual isolation, rather than hybrid breakdown, because hybrids copulated at frequencies intermediate between interspecific and intraspecific males.
