Phenotypic differentiation in female preference related to geographic variation in male predation risk in the Trinidad guppy (Poecilia reticulata)

摘要: Populations of the Trinidad guppy range from areas with high levels predation by other species fish to little or no piscine predation. Previous studies have shown that variation among populations in male coloration can be explained a balance between female preference for brighter males and natural selection against bright males. High courtship activity may also increase both risk mating success. Therefore, high-predation areas, females mate court frequently as well those choose would presumably produce offspring low survivorship. Consistent this selection, we observed were less likely courting than low-predation populations. This result supports hypothesis is evolving character genetically correlated preferred character, which case higher acting should related lower preference.