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Intrasexual Selection

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Many examples of intrasexual selection are readily observable. Males of many species fight, display, vocalize, and otherwise compete for the opportunity to mate with available females. Male deer fight with their antlers and enormous male elephant seals fight with their bulk to establish dominance and

Male (left) and female black widow spiders. Mate choice is a widely popular topic of study.
Male (left) and female black widow spiders. Mate choice is a widely popular topic of study. consequently the right to mate with females. Male red-winged blackbirds display and sing to establish their territories, the quality of which determines the number of mates they will attract.
Post-mating competition also occurs. Male dragonflies often guard their
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