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The mbuna cichlids of Lake Malawi are a diverse, monophyletic, and recently derived clade. Sexual selection is thought to have accelerated their rapid diversification, though the mechanism by which this has occurred remains unknown. In this study, we examine the effect that male–male interactions have on female preference. We first used a short interaction experiment as a proxy for male dominance...
Amplexus in which a male grasps a female from behind, characterizes most anurans as their strategy to ensure mating success. The behavior usually takes place some minutes, hours or days before gamete release. In a few species, however, it forms very early and lasts up to months, assumed to be an extreme pattern of mate guarding. Rana chensinensis is a temperate frog endemic to northern China. They...
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