BILD Sociology

BILD Sociology - BILD 3 2 June, 2008 Your TAs - should you...

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BILD 3 2 June, 2008 Woodruff: sociobiology 1 1 Your TA’s -- should you care to mention them in CAPE… Ray Assaf Olivia Huang Haley Hunter-Zinck Raghav Khandewal Sheeren Masifi Aaron Mohammadi Sarah Paek Vu Phan Sara Tabikh Kate Tsyrklevich Shirley Xing Christine Young 2 Promiscuity Polygyny Monogamy 3 SOCIAL BEHAVIOR SOCIETY: group of individuals of the same species organized in a cooperative manner. SIMPLE AGGREGATION: flock of pelicans, school of fish MALE-FEMALE: critical partnership but basic conflict of interest PARENT-OFFSPRING: basic conflict of interest (weaning) HIGHER SOCIAL GROUPS: reproductive behavior maintenance of living space feeding behavior anti-predator behavior 4 SOCIALITY HAS EVOLVED BY TWO DIFFERENT ROUTES FAMILIAL ROUTE (involves related individuals). Solitary breeding females or pairs and no parental care Then parental care evolves Then older offspring help the parents Sociality has evolved in: many birds; helpers-at-the-nest in scrub jays most wasps social mammals PARASOCIAL ROUTE (involves unrelated individuals). 5 SOCIALITY HAS EVOLVED BY TWO DIFFERENT ROUTES FAMILIAL ROUTE (involves related individuals). PARASOCIAL ROUTE (involves unrelated individuals). Solitary females or unrelated breeding pairs aggregate around clumped resource Cooperation begins with defense of resource Colony persists multi-generationally, division of labor evolves Individuals of different generations share tasks and cooperate… most bees, few birds 6 TYPES OF SOCIAL ACTS Act benefits Act costs the recipient the recipient Act benefits the performer Cooperative Selfish Act costs the performer Altruistic Spiteful
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BILD 3 2 June, 2008 Woodruff: sociobiology 2 7 ALTRUISM ACT CONSEQUENCE SIBLINGS, PARENT-CHILD SHARE 50% OF GENES G’PARENT - G’CHILD 25% FIRST COUSINS 13% 8 ECONOMICS OF COOPERATION MUTUALISM: animals cooperate and pay costs and reap benefits simultaneously. Costs and benefits need not be equitable but cooperation must be better than non-cooperation. RECIPROCITY: one animal helps another now at
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BILD Sociology - BILD 3 2 June, 2008 Your TAs - should you...

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