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to determine an unusual carnivore mating system. It is probable that they mate because they are motivated for the actual copulation, and because this is connected with a positive experience. "Ecology and social behaviour of Mongolian gerbils, Meriones unguiculatus, at Xilinhot, Inner Mongolia, China". 29 Post mating, banana slugs will some times gnaw off their partners penis as an act of sperm competition. " Baculum length and copulatory behavior in primates." American Journal of Primatology.1 (1987 51-60. 76 In the water beetle genus Acilius, an " evolutionary arms race " between the two sexes means that there is no courtship system for these beetles. Sexual monogamy is defined as an exclusive sexual relationship between a female and a male based on observations of sexual interactions.
On ten of these occasions the male's pedipalps then seemed to get stuck while he was transferring the sperm (which is rarely the case in other species of spider and he had great difficulty freeing himself. 132 133 In most deer species, a copulatory jump also occurs. As a consequence, the mother rat solicits males to the nest but simultaneously becomes aggressive towards them to protect her young.
107 Organisers of the Against Nature? Sammentrkninger af de indre kønsdele. Wrasses exhibit three different mating systems: polygynous, lek-like, and promiscuous mating systems. "Fluctuating asymmetry and sexual selection".
Sexual behaviour may be tied more strongly to establishment and maintenance of complex social bonds across a population which support its success in non-reproductive ways. In natural populations of the bird Parus major (great tit inbreeding is likely avoided by dispersal of individuals from their birthplace, which reduces the chance of mating with a close relative. A combination of terms indicates examples where levels of relationships coincide,.g., sociosexual and sociogenetic monogamy describe corresponding social and sexual, and social and genetic monogamous relationships, respectively. Female prairie voles release oxytocin after copulation with a partner, and similarly develop an attachment to their partner. " Journal of the Mammalogical Society of Japan.1 (1994 67-74. M (7 February 2004). An example is the social wasp Apoica flavissima. Vol 3 (3rd.). Mammal Review (published January 2013). This female is trailing the atrophied remains of males she has encountered. 131 In most ruminant species, a single pelvic thrust occurs during copulation.
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