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At least 307 records · Page 17Linked to original sources
PubMed1988

Prolonged or repeated copulation and male longevity in the tick Ixodes rubicundus.

Male Ixodes rubicundus were found in copula with attached females in 59% of individuals. The number of males attaching to the female integument or to the the host negligible. In laboratory experiments, males enclosed with females in a small vial had significantly longer life spans than solitary males. Paired males were found to be in copula on 20-34% of observations. Solitary males lost weight while paired males gained weight over a 2-day period. However, the specific energy content of the 2 groups remained constant.

Animals↗
PubMed1977

[Maturation of the female Tetrix undulata (Swrb) (Orthoptera, Tetrigidae): influence of the male and copulation:parthenogenetic egg-laying].

The percentage of laying females and laying time, are compared between mature females (diapause break by chilling) and diapause strain females (diapause not broken by chilling) reared with mature male or diapause male or without male. For the same physiological state of the females (mature or diapause) there is no difference in the percentage of females laying, when they are reared with mature male or with diapause one or none; but the laying time is shortest with mature male, longer with male in diapause, even longer without male. Parthenogenetic egg-pods can be obtain. Rearing with mature males does not break the reproductive diapause of females. In parthenogenetic egg-pods the number of eggs is short for low diapause females; greater for mature ones and greatest for females with strong diapause broken by a corpus allatum implant of mature female of Locusta migratoria. Corpus allatum of the low diapause strain of females of Tetrix undulata have less activity than that of mature females. Few parthenogenetic eggs develop, even less hatch. In Tetrix undulata parthenogenesis is accidental.

Animals↗
PubMed1993

Vaginal anatomy of the domestic cat (Felis catus) in relation to copulation and artificial insemination.

In the course of an investigation of artificial insemination (AI) in the domestic cat, the site of deposition of the semen during vulval insemination was questioned. A limited study was carried out to ascertain both the anatomy and distensibility of the vagina and urogenital sinus, and the location of the cervix in relation to the vulva. In live restrained female cats a 4 mm diameter Teflon probe could not be inserted more than 20 mm, and elicited a cry similar to the copulatory vocalization when the resistance was encountered. However, a 1 mm diameter ball-tipped needle was passed to a depth of 40 mm. To confirm these observations, four adult female domestic cats were dissected. The cervix was located approximately 45 mm cranial to the vulva. The urogenital sinus narrowed approximately 17.5 mm from the vulva, preventing the passage of a 4 mm probe, and led to a constricted vagina, which permitted the passage of a 1 mm diameter probe to the depth of the cervix. A radiological investigation of a single anaesthetized cat supported these results. The erect penis of the adult male was measured during sexual arousal in five animals; the mean length and width (+/- SD) was 21.2 +/- 2.2 mm and 5.1 +/- 0.5 mm, respectively. These observations lead us to conclude that the stimulus for vocalization during natural mating is distention of the posterior vagina, where semen is probably deposited. The site of semen deposition is uncertain in several accounts of artificial insemination, as the passage of the insemination device depends on its diameter.

Animals↗