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Egg viability in the rainbow darterEtheostoma caeruleum, a fish apparently lacking female mate choice, was found to decline rapidly after ovulation. It was observed that the majority of a female's clutch may fail to hatch if she is prevented from mating for as little as 6 h. These data suggest that exercising female mate preferences may be selectively disfavoured inE. caeruleumdue to the high cost of delaying mating.more » « less
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