Data from: Odor is linked to adrenocortical function and male ornament size in a colonial seabird

, Alexander S. Kitaysky, Evgenia V. Kitaiskaia & Hector D Douglas
Crested auklets (Aethia cristatella), colonial seabirds of Alaska and Siberia, emit a citrus-like odorant from wick-like feathers. We examined whether the odorant emission is linked to adrenocortical function and correlated with size of the crest feather ornament. Conventional signals like the size of crest ornament are inexpensive to produce and thus may be prone to deception. However, assessment signals such as the odorant could be more reliable if they impose costs and more proximate since...
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