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A stallion mating with a mare. While horses in the wild mate and foal in mid to late spring, in the case of horses domestically bred for competitive purposes, especially horse racing, it is desirable that they be born as close to January 1 in the northern hemisphere or August 1 in the southern hemisphere as possible, [11] so as to be at an ...
Males then create a second territory, presumably in order to attract a secondary female to breed. Even when they succeed at acquiring a second mate, the males typically return to the first female to exclusively provide for her and her offspring. [24] Polygynous mating structures are estimated to occur in up to 90% of mammal species. [25]
Because of this, there are generally more males available to mate at a given time, making females a limited resource. [4] [5] This leads males to evolve aggressive mating behaviors which can help them acquire mates. [5] Sexual coercion has been observed in many clades, including mammals, birds, insects, and fish. [6]
Before mating and copulation, the male spider spins a small web and ejaculates on to it. He then stores the sperm in reservoirs on his large pedipalps, from which he transfers sperm to the female's genitals. The females can store sperm indefinitely. [7] Butterflies mating
Hence, seasonal breeders can be divided into groups based on fertility period. "Long day" breeders cycle when days get longer (spring) and are in anestrus in fall and winter. Some animals that are long day breeders include ring-tailed lemurs, horses, hamsters, groundhogs, and mink. "Short day" breeders cycle when the length of daylight shortens ...
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