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Contrary to popular misuse, "colt" refers to a young male horse only; "filly" is a young female. Though many horse owners may simply breed a family mare to a local stallion in order to produce a companion animal, most professional breeders use selective breeding to produce individuals of a given phenotype, or breed. Alternatively, a breeder ...
Slave breeding was the practice in slave states of the United States of slave owners systematically forcing slaves to have children to increase their wealth. [1] It included coerced sexual relations between enslaved men and women or girls, forced pregnancies of enslaved women and girls due to forced inter inbreeding with fellow slaves in hopes ...
Among harem-holding species, the adult females mate only with their harem stallion, while in other species, mating is more promiscuous and the males have larger testes for sperm competition. [46] Estrus in female equines lasts 5–10 days; physical signs include frequent urination, flowing muscus, and swollen, everted labia.
To allow only the finest animals to breed on, while preserving adequate genetic diversity, only a small percentage of all male horses should remain stallions. Mainstream sources place the percentage of stallions that should be kept as breeding stock at about 10%, [8] while an extreme view states that only 0.5% of all males should be bred. [9]
These breeding males also have short tenure, and it is common for groups of males who do not have harems to attack a breeding male in order to gain reproductive access to his females. In some cases, polygyny can lead to aggression between males. An example of species that exhibit male-male aggression under polygynous system is Allobates femoralis.
Female size and a large breeding territory defended by more males may force male cooperation. For males, such factors can promote an increase in reproductive success, leaving behind the cost of paternity share (Mating Systems, p277). Comb-crested jacana's (Irediparra gallinacea) has shown genetic evidence for paternity assurance. [26]
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Many animal species have specific mating (or breeding) periods e.g. (seasonal breeding) so that offspring are born or hatch at an optimal time. In marine species with limited mobility and external fertilisation like corals , sea urchins and clams , the timing of the common spawning is the only externally visible form of sexual behaviour.