Sexual selection on alleles that determine body size in the swordtail Xiphophorus nigrensis

Abstract

In a natural population, we document changes in the frequencies of alleles influencing body size and size-correlated alternative male reproductive tactics, and we examine the possible role of sexual selection in producing these changes. Male swordtails (Xiphophorus nigrensis, Rio Choy) exhibit three body size classes (small, intermediate, and large) that… (More)
DOI: 10.1007/BF00178316

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