Pigment-based skin colour in the blue-footed booby: an honest signal of current condition used by females to adjust reproductive investment

@article{Velando2006PigmentbasedSC,
  title={Pigment-based skin colour in the blue-footed booby: an honest signal of current condition used by females to adjust reproductive investment},
  author={Alberto Velando and Ren{\'e} Beamonte-Barrientos and Roxana Torres},
  journal={Oecologia},
  year={2006},
  volume={149},
  pages={535-542}
}
In monogamous species, the value of present reproduction is affected by the current condition of the mate, and females may use male ornaments to evaluate his condition and adjust their level of investment according. Many animals display colour in fleshy structures which may be accurate indicators of quality due to their potentially rapid response to changes in condition. Here we show that in the blue-footed booby, Sula nebouxii, male foot colour is structurally (collagen arrays) and pigment… 
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