Sentence examples for copulation during the from inspiring English sources

A single experimental male and a virgin CS female were placed in the chamber and observed for 10 min. The Courtship Index (CI) was calculated as the fraction of time that a male spent courting the female (includes tapping, wing extension and vibration, attempted copulation) during the observation period.

While scientists do not know how often robins have sex, according to Mr. Harrison, they do know that Cooper's hawks average an "astounding 372 copulations during the monthlong pre-egg-laying period".

We observed a total of 262 copulations

The measure of mating success for each male (years 2000, 2002 and 2003) was based on the number of observed copulations during the breeding season, which provides a very good estimator of reproductive success in fallow deer [ 29].

In several species, sperm is known to be transferred only at the very beginning of copulation, while during the later stages of copulation males transfer substances that build effective mating plugs or other manipulating seminal fluids [ 24, 25].

Gestation takes between 21 and 28 days after copulation, during which time the female constructs a nursery burrow.

The overall aim of the present study was to analyse the structure of female copulation calls during the ovarian cycle and, by doing so, examine whether specific call parameters signal the probability of conception in wild long-tailed macaques.

Only copulations occurring during the maximum tumescence phase were considered.

We scored all instances of aggression during copulations, and during the subsequent 10-minute time-window, provided we could identify a target of aggression.

This female control may happen at different stages of the breeding cycle: before copulation; during copulation; after copulation but before fertilisation and following fertilisation (e.g. Wagner 1991; Birkhead and Møller 1993; Graves et al. 1993; Wagner et al. 2004; Adler 2010; Brekke et al. 2013).

In the males of several fishes, particular rays of the median fins are modified for attracting females and/or copulation during courtship (Meyer 1997; Zauner et al. 2003; Kwan et al. 2013).