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Biologists link sexual selection and placenta formation


July 9, 2014

non-placental species Xiphophorus birchmani Sexual selection enhances opportunities to mate, the tail of male peacocks being an iconic example. Biologists at the University of California, Riverside, have found that sexual selection and "placentation"--the formation of a placenta--are linked. Describing the life histories of more than 150 species of fish in the family Poeciliidae, the researchers found that species with placentas tend to have males that do not have bright coloration, ornamentation or courtship displays. Full Story

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University of California, Riverside

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