ANTH 311 Lecture 11: Primate Social Groups (Group Composition)
13 Dec 2017
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Mother and young are the only consistent grouping. Male ranges may overlap the ranges of several females. Usually seen in nocturnal strepsirhines (e. g. aye aye, loris) and orangutans. Found in all nocturnal strepsirhines because their lives don"t include interactions with other animals. One male - one female with their immature offspring. Tend to be monomorphic (similar in behaviour and/or morphology), as a result of equal parental investment (forms of investment may be direct or indirect) Direct parental investment: providing love and affection. Indirect parental investment: making sure the young get access to all resources they need to survive, or making sure the family has a good amount territory they need. Male involvement with kids varies (e. g. male marmosets are very highly involved with their kids, male involvement also high in owl monkeys) Usually seen in gibbons and siamangs (lesser apes), marmosets and tamarins (nwm), owl monkeys (nwm), indri, and titi monkey (nwm)
