ANTH 311 Lecture Notes - Lecture 10: Cercopithecinae, Social Relation, Scramble Competition
13 Dec 2017
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Document Summary
Females disperse, males resident brotherhood groups. Community vs party (also known as a subgroup) Foraging parties constantly changing size and composition very fluid. Fission-fusion relationships typically seen in large brain, big bodied animals. When cercopithecine population grows, they fission-fusion along matrilineal lines. Long term studies are revealing a range of variation in cohesion. Muriquis: underwent a huge population expansion (25 to 100), after this, researchers saw fission fusion (change in cohesion). Group went from tight cohesive group to fission fusion, there was less dispersal, and a vertical home range expansion (i. e. started spending more time on the ground). Hamadryas: fission into one male units during the day, and fusion into multiple one male groups at night. Even though it produces opportunity for increased competition. Increase in population density (# individuals/area) results in increased group size be- cause cost of dispersal high, so theres nowhere to go, thus, habitat becomes saturated, resulting in loss of competition since animals disperse less.
