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Because females do not need extra help raising their nests, males can afford to invest in multiple females. Nonetheless, male parental care is often found in many polygynous territorial bird species, [9] leading to female competition for male assistance. Most often, males will seek a second female to impregnate, once the first female has laid ...
Indirect benefits of mating for females can be gained through sperm competition to attain "good genes", cryptic female choice, increased genetic quality, and genetic diversity. [7] Females spiders ( Pisaura mirabilis ) store more sperm from gift-giving males suggesting that sperm storage is under female control through cryptic sperm choice. [ 8 ]
Horses can breed with Przewalski's horse to produce fertile hybrids. Mule, a cross of female horse and a male donkey. Hinny, a cross between a female donkey and a male horse. Mules and hinnies are examples of reciprocal hybrids. Kunga, a cross between a donkey and a Syrian wild ass. Zebroids. Zeedonk or zonkey, a zebra/donkey cross. Zorse, a ...
harassment to miscarriage: amongst wild horses and baboons, the male will continually attack pregnant females until they miscarry. Pheromone -based spontaneous abortion in some rodents such as mice , a new male with a different scent will cause females who are pregnant to spontaneously fail to implant recently fertilised eggs.
Females can also form alliances with other females for protection against aggressive males. [1] Researchers have observed such alliances in many other female-bonded species, including other Old World monkeys such as macaques , olive baboons , patas and rhesus monkeys, and gray langurs ; New World monkeys such as the capuchin; and prosimians ...
Capuchin monkey. A study at Yale–New Haven Hospital trained capuchin monkeys to use silver discs as money in order to study their economic behavior. The discs could be exchanged by the monkeys for various treats. During one isolated incident, a researcher observed what appeared to be a monkey exchanging a disc for sex. The monkey that was ...
There have been both successful and unsuccessful examples of interspecific pregnancy in a multitude of different animals: “alpaca and lama (Godke 2001), cow (Bos taurus) and zebu (Bos indicus; Summers et al. 1983), banteng (Bos javanicus) and cow (Bos taurus; Solti et al. 2000), horse, donkey, Przewalski’s horse and Grant’s zebra (Summers ...
However, by contradiction, some spontaneously ovulating species can occasionally undergo mating-induced preovulatory LH surges. Species in which the females are induced ovulators include cats, rabbits, ferrets, and camels. [5] In 1985, Chen et al., used Bactrian camels to investigate the factor(s) that induce ovulation during breeding season ...