Data from: Carotenoid-based skin ornaments reflect foraging propensity in a seabird, Sula leucogaster

Nathan P. Michael, Roxana Torres, Andreanna J. Welch, Josh Adams, Mario Erandi Bonillas-Monge, Jonathan Felis, Laura Lopez-Marquez, Alejandro Martínez-Flores & Anne E. Wiley
Carotenoid-based ornaments are common signaling features in animals. It has long been proposed that such ornaments communicate information about foraging abilities to potential mates. However, evidence linking foraging with ornamentation is largely missing from unmanipulated, free-ranging populations. To investigate this relationship, we studied the brown booby (Sula leucogaster brewsteri), a seabird with a carotenoid-based gular skin ornament. 13C values from both feathers and blood plasma were negatively correlated with male gular color, indicating birds that...
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