Suppose there are two strategies used in conflicts over resource

# Suppose there are two strategies used in conflicts over resource

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Suppose there are two strategies used in conflicts over resource: Hawk always contests the resource, and if necessary fights for it, giving up only if seriously injured Dove never fights, instead either sharing (with other non-aggressors) or retreating (if threatened) these tactics are heritable in a very simple fashion: a Hawk gives birth only to other Hawks, a Dove only to other Doves (this assumption can be relaxed, but we'll keep the exposition simple by adopting it for now) Game theory models usually define the payoffs from various tactics in terms of mathematical variables, but to make things a little more concrete let's suppose the resource being contested is worth 100 "fitness points" When two Doves face each other, they divide the resource equally, so payoff to each = 50 "fitness points" In a population of Doves, all goes well -- until an aggressive Hawk mutant arises Hawk wins every contest with Doves, gaining sole access to the resource (e.g., a patch of food) in every contest it engages in, and hence averaging 100 pts per encounter; since resources are converted into increased reproduction (by whatever conversion metric applies to our hypothetical 100 fitness pts), Hawks proliferate -- natural selection

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## This note was uploaded on 11/22/2011 for the course ANT ANT2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Suppose there are two strategies used in conflicts over resource

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