Animal notes may 2

Animal notes may 2 - 5/2/08 altruistic- beneficial to...

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5/2/08 altruistic - beneficial to someone else, but not yourself Living in a Group: Death: Passive(no per capita benefit): -selfish herd -concentration at resources Active(per capita benefit): -cooperative hunting -group defense -confusion(group massed together makes hard to tell one individual apart) -more eyes and more ears -saturation on predator(all babies in one spot predator can not possibly eat them all, also with adults) Food: -cooperative hunting -increases probability of finding food Sex: -no searching for mates and more choice Group Living: Cost vs. Benefits Costs - Benefits - -sharing food -sharing resources -disease spreads faster -pecking order -can have risk to offspring -competition: food, mates, etc. -easier for predators to find -group decision making is hard Cooperation: -must be within a species 1. Mutualism- -both parties benefit simultaneously -no real potential for cheating(examples: any active group reason(looking for predators, having babies at same time), simultaneous grooming, communal webs(spiders))
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2. Reciprocal Altruism-
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This note was uploaded on 09/29/2009 for the course ECON 101 taught by Professor Me during the Spring '09 term at Ozark Christian.

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Animal notes may 2 - 5/2/08 altruistic- beneficial to...

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