The deleterious effects of high inbreeding on male Drosophila melanogaster attractiveness are observed under competitive but not under non-competitive conditions.

Abstract excerpt

In order for the male courtship traits to honestly signal quality they need to be condition-dependent. Moreover, if these traits capture genetic variation in condition they should resemble life-history traits in being subject to strong directional selection and, consequently, suffer strong inbreeding depression. In this study we investigated the effect of high inbreeding on male attractiveness by assessing mating...

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