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Azara's night monkeys are another species that proved to be monogamous. In an 18-year study conducted by the University of Pennsylvania, these monkeys proved to be entirely monogamous, exhibiting no genetic information or visual information that could lead to the assumption that extra pair copulation was occurring.
Obligate monogamy, or Type II monogamy, is practiced by species that live in overlapping territories, where females cannot rear their young without the help of their partners. [7] Species such as Indris ( Indri indri ), Night monkeys ( Aotus trivirgatus ), African dormice ( Notomys alexis ), and Hutias ( Capromys melanurus ) are observed as ...
New World monkeys are small to mid-sized primates, ranging from the pygmy marmoset (the world's smallest monkey), at 14 to 16 cm (5.5 to 6.5 in) and a weight of 120 to 190 g (4.2 to 6.7 oz), to the southern muriqui, at 55 to 70 cm (22 to 28 in) and a weight of 12 to 15 kg (26 to 33 lb).
The night monkey is socially monogamous, and all night monkeys form pair bonds. [25] Only one infant is born each year. The male is the primary caregiver, and the mother carries the infant for only the first week or so of its life.
In common with other night monkeys, the Panamanian night monkey is one of the few monogamous monkeys. [6] The monogamous pair generally gives birth to a single infant each year, although twins occasionally occur. [7] The gestation period is about 133 days. [7]
Formerly the bonobo was known as the "pygmy chimpanzee", despite the bonobo having a similar body size to the common chimpanzee. The name "pygmy" was given by the German zoologist Ernst Schwarz in 1929, who classified the species on the basis of a previously mislabeled bonobo cranium, noting its diminutive size compared to chimpanzee skulls.
Azara's night monkey (Aotus azarae), also known as the southern night monkey, is a night monkey species from South America. It is found in Argentina, Bolivia, Brazil, Peru and Paraguay. [2] The species is monogamous, with the males providing a large amount of parental care. It is named after Spanish naturalist Félix de Azara.
Marmosets live in family groups of three to 15, consisting of one or two breeding females, an unrelated male, their offspring, and occasionally extended family members and unrelated individuals. Their mating systems are highly variable and can include monogamy, polygyny, and polyandry. In most species, fraternal twins are usually born, but ...