Informative content of multiple plumage-coloured traits in female and male European Rollers

  • Nadia Silva
  • Jesús M. Avilés
  • Etiénne Danchin
  • Deseada Parejo
Original Paper

DOI: 10.1007/s00265-008-0628-y

Cite this article as:
Silva, N., Avilés, J.M., Danchin, E. et al. Behav Ecol Sociobiol (2008) 62: 1969. doi:10.1007/s00265-008-0628-y

Abstract

Animals may assess the quality of other individuals by using information that different ornaments may provide. The European Roller (Coracias garrulus) is a socially monogamous species in which males and females display highly conspicuous plumage colouration. According to the mutual selection hypothesis, we predicted that, in this species, plumage coloration could signal individual quality in both sexes because both female and male rollers invest a considerable amount of time caring for their offspring. We used spectrophotometric measurements to investigate the information content of multiple plumage colour traits. We found that the roller is actually a sexually dimorphic and dichromatic species. Different plumage colours from different origins were correlated within individual. Head and back brightness correlated with body condition in both sexes, and in males, head brightness correlated with the number of fledglings in successful nests, while head green-yellow saturation correlated with parental provisioning. Meanwhile, in females, back brightness was related to the number of fledglings in successful nests and to parental provisioning rate. In addition, there was a positive assortative mating in relation to weight, body condition, head green-yellow saturation and back brightness. Finally, we found a positive correlation between parent and offspring coloration. Altogether, these results suggest that multiple colour traits may act as quality indicators in the roller and that they may be used by the two sexes to assess potential mate quality.

Keywords

Assortative mating Coracias garrulus Multiple mutual ornaments Plumage coloration 

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Nadia Silva
    • 2
  • Jesús M. Avilés
    • 3
  • Etiénne Danchin
    • 2
  • Deseada Parejo
    • 1
  1. 1.Department of Functional and Evolutionary EcologyEstación Experimental de Zonas Áridas, C.S.I.C.AlmeríaSpain
  2. 2.Laboratoire Évolution et Diversité Biologique, UMR CNRS-UPS 5174Université Paul Sabatier–Toulouse IIIToulouse Cedex 9France
  3. 3.Departamento de Biología Animal y Ecología, Facultad de CienciasUniversidad de GranadaGranadaSpain

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