Strong evidence supporting a relationship between colour pattern and apparent survival in common crossbills / Blanca Fernández‑Eslava, Daniel Alonso, David Galicia, Juan Arizaga.

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Computer filePublication details: [S.l.]: Springer, 2021.Description: pp. 243-249Content type:

texto (visual)

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elctrónico

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Artículo científico

Summary: Carotenoid staining has been repeatedly shown to serve as a sexually selected individual quality signal. In diferent species, individuals that show brighter carotenoid-based signals have been found to have superior feeding abilities, recover faster from disease, and generally enjoy better body condition. In the common crossbill (Loxia curvirostra), the colour has also been related to the diferent populations, with northern and central European populations being described as redder than those in the Mediterranean region. A study in the Pyrenees showed that long-winged individuals had lower apparent survival, and the proportion of red individuals was higher in long-winged birds, concluding that they could be nomadic birds (that travel long distances). A priori, if the red crossbills are more mobile than the yellow and orange ones, their apparent survival will be lower. However, in our study, red males showed a greater survival than males of other colours and almost double than that of the yellow ones. These results suggest that red coloration is linked to higher quality individuals regardless of their mobility.

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Carotenoid staining has been repeatedly shown to serve as a sexually selected individual quality signal. In diferent species,
individuals that show brighter carotenoid-based signals have been found to have superior feeding abilities, recover faster from
disease, and generally enjoy better body condition. In the common crossbill (Loxia curvirostra), the colour has also been
related to the diferent populations, with northern and central European populations being described as redder than those in
the Mediterranean region. A study in the Pyrenees showed that long-winged individuals had lower apparent survival, and the
proportion of red individuals was higher in long-winged birds, concluding that they could be nomadic birds (that travel long
distances). A priori, if the red crossbills are more mobile than the yellow and orange ones, their apparent survival will be lower. However, in our study, red males showed a greater survival than males of other colours and almost double than that of the yellow ones. These results suggest that red coloration is linked to higher quality individuals regardless of their mobility.

Fernández-Eslava, B., Alonso, D., Galicia, D., Arizaga, J.. 2021. Strong evidence supporting a relationship between colour pattern and apparent survival in common crossbills. J. Ornithol. 163, 243–249.

Ornitología

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