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The sexual union of two individuals, resulting in insemination or deposition of the male gametes in proximity to the female gametes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(1) The union of two individuals in sexual intercourse.

(2) The process of the syngamy of two sex cells (gametes). Copulation is usually understood to mean the syngamy of sex cells that are externally almost or completely indistinguishable. If the male gamete differs sharply from the female, the process of their syngamy is called fertilization.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
They suggested that pheromone emission was inversely proportional to the age of females, with an eventual cessation of pheromone emission once females pass a certain age, and that this decrease resulted in a decreased rate of copulation with the males.
The percentage of mature oocytes and the copulation rate was significantly lower in the MNP group than in the MC, MSh, and MNP+TR groups but not different among the SC, SSh, SNP and SNP+TR groups.
The probability of copulation was not predicted by male size or percentage of patch cover (Binomial Model; PCI: [beta] = 0.47.
Then males walked backwards with the abdomen touching the substrate, raising their tegmina about 130[degrees] to the horizontal body axis, positioning himself underneath the female and assuming the copulation position (Fig.
Pairs in copula typically aborted copulation shortly after collection but often resumed at sporadic intervals over the 3-d study period (30/65 pairs).
Smith, 1797) reared in the laboratory have documented that the number of copulations in cages with multiple couples (n= 25) is twice greater (Milano et al., 2008) than the number of copulations in cages with only one couple (Juarez et al., 2012).
note that copulation is said to last for 30 to 180 minutes, after which the animals go their separate ways.
Rather, the action of stabilizing selection on sex comb teeth number may be involved: unadequate teeth number may influence female choice in a way that females avoid copulation with males possessing them, because of unappropriate tactile stimulation (see Markow et al., 1996).
We used separate paired t-tests to compare the average number of copulations per cage and the average duration of mating for each species at each age.
In the four pairs observed in terrariums, during copulation the female remained firmly attached to the ball with her middle and hind legs, while the male was positioned at an angle of 45[degrees] to the female's horizontal, holding the female firmly with his middle and hind legs and not letting her go for the ca.
By freezing pairs after known periods of time (20, 40, 60, 80 and 100 minutes after the male mounted the female), it was possible to deduce the order of some events during copulation.