HIGHLIGHTS
- who: UC Irvine and colleagues from the University of California, University of California, Los Angeles, CA, USA have published the research: Pronounced reproductive skew in a natural population of green swordtails, Xiphophorus helleri, in the Journal: (JOURNAL)
SUMMARY
Darwin introduced the concept of sexual selection in response to the conundrum posed by extravagant, typically gender-restricted, phenotypic features that seem to be of no adaptive value (and indeed may lower viability) in their bearers. Sexual selection on such heritable phenotypes normally plays out through male-male competition for mates (intrasexual selection) or via . . .
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