"The 15 most bizarre animal mating rituals". The mating system specifies which males mate with which females, and under what circumstances. Ishibashi Y, Saitoh T (2008). Cuckoldry is a variant of polyandry, and can occur with sneak spawners. "Sociobiology of Rape in Mallards (Anas platyrhynchos Responses of the Mated Male". 131 In most ruminant species, a single pelvic thrust occurs during copulation. Furthermore, the oxytocin levels of the couples correlate positively; when the oxytocin secretion of one increases the other one also increases.
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Some species, such as the Rana Clamitans (green frog spend from June to August defending their territory. Ive got a headache. 34 35 Amphibians edit For many amphibians, an annual breeding cycle applies, typically regulated by ambient temperature, precipitation, availability of surface water and food supply. "The genetics of inbreeding depression". Smithsonian Contributions to Zoology. Polyandry edit The anglerfish Haplophryne mollis is polyandrous.
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