Data from: Low-quality birds do not display high-quality signals: the cysteine-pheomelanin mechanism of honesty

Ismael Galván, Kazumasa Wakamatsu, Pablo R. Camarero, Rafael Mateo & Carlos Alonso-Alvarez
The mechanisms that make that the costs of producing high-quality signals are unaffordable to low-quality signalers are a current issue in animal communication. The size of the melanin-based bib of male house sparrows Passer domesticus honestly signals quality. We induced the development of new bibs while treating males with buthionine-sulfoximine (BSO), a substance that depletes the levels of the antioxidant glutathione and the amino acid cysteine, two elements that switch melanogenesis from eumelanin to pheomelanin....
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