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We examined the effects of infection by the tapeworm Hymenolepis diminuta on mate choice in a wild strain of grain beetle, Tenebrio molitor. Female beetles mate multiply, so both precopulatory and postcopulatory behaviours are important to sexual selection in this species. When virgin females were allowed to choose between tethered males, one infected and one noninfected, they spent more time near...
Sexual characters may reveal the quality of a potential mate, including the mate's level of infection with parasites. Females that prefer males with low levels of infection or no infection may benefit in several ways. Direct benefits may include avoidance of infection, acquistition of larger nuptial gifts or enhancement in fecundity due to differences in male fertility. Females may also benefit indirectly...
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