Chapter 9

Chapter 9 - Chapter 9- Family, Society, and Evolution...

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Chapter 9- Family, Society, and Evolution Territoriality and dominance o Social behavior- includes all kinds of interactions between individuals of the same species from cooperation to antagonism o Territory- any area defended by one or more individuals Temporary or permanent o Dominance hierarchy- subsequent contests between individuals are resolved quickly in favor of higher-ranking individuals o Occupation of space and social rank often related Group living o Increase chances of survival, rate of feeding, success in finding mates Less time watching for predators and more time feeding Deplete food source in an area faster so have to spend more time traveling Natural selection an social behaviors o Combination of cost/benefit to donor and recipient Cooperation- donor and recipient benefit Selfishness- donor benefits, recipient harmed Spitefulness- both donor and recipient harmed Does not happen very frequently because animals do not commonly do things that would hurt them also
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Chapter 9 - Chapter 9- Family, Society, and Evolution...

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