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Lec 2-Social and Mating Systems.pdf

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Joyce Parga

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1/17/2013 Social System Social and Mating Systems • Composition of a group – Group-living versus alone Social Systems - Types Social Systems - Types • Solitary/Semi-solitary: • Pair-living: • Offspring live w/mother until old enough • One male, one female, and offspring to fend for themselves • Live together in same territory or home range • Animals only come together to mate 1 1/17/2013 Social Systems - Types Social Systems - Types • Single-male groups (or 1-male units): used • Multi-male, multi-female groups: to be called “harems” • Multiple adults of each sex • 1 male with 2 or more females Social Systems - Types Social Systems - Types • Multi-male, single female • Social groups split into smaller feeding parties• 1 female with 2 or more males and offspring • Example: marmosets and tamarins 2 1/17/2013 Mating System Mating System • Types: • Monogamy- 1 male mates with 1 female exclusively • Sometimes mating system is the same as social system, but not always Mating System Mating System • Types: • Polygyny- 1 male mates w/multiple females, • Polyandry but each female mates only w/that male 3 1/17/2013 Mating Systems Benefits to group living • Polygynandry- both male
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