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Primate social systems and dominance. Although group structure may vary quite a bit among different Primate species, all Primates rely on group structure. Why do Primates live in groups? To avoid being eaten by predators . More opportunities to mate
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Although group structure may vary quite a bit among different Primate species, all Primates rely on group structure. Why do Primates live in groups? • To avoid being eaten by predators. • More opportunities to mate • More help finding/collecting food resources • Better learning/teaching happens within groups Social systems
Solitary foragers:Single adult individual or mother-child pair dispersed throughout home range. Some Prosimians and Orangutans are solitary foragers. Primate group organization
Monogamous (pair bonded): Groups that consist of male-female pair and their offspring. Species who are monogamous include Gibbons and Siamangs. Monogamous
Polyandrous: Groups that consist of one female, two or more males and their offspring. Species who are polyandrous are some Tamarins. polyandrous
Uni-male (harems): Groups that consist of one male, multiple females and their offspring. Species who are uni-male are some monkeys and gorillas. Uni-male (harems)
Multi-male/Multi-female: Groups which consist of multiple male and females and their offspring. Species who live in mult-male/multi-female social system. Multi-male/multi-female
Dominance is beneficial in the following ways: Better mating opportunities which lead to more offspring. Better access to food resources. Access to best sleeping sites. DOMINANCE
It’s more common for males to be dominant in Primates. A few reasons for this are: Males are usually bigger and stronger than females. Males are usually more aggressive and competitive. Males are better at gaining support of the group. Species who have a male dominant hierarchy are Chimpanzees and Capuchins. Male dominance
Female dominance isn’t as common as male dominance in Primates. Most times, females are able to dominate males by uniting as a group. One exception is the Ringtailed Lemur. Males are submissive without aggression from a group of females. In many instances where females dominate, they inherit their status at birth from their mother. In female dominated socieities, males usually leave the group around a certain age in order to prevent inbreeding. Female Dominance Ringtailed Lemur Bonobo Chimpanzee