Relationships between female quality, egg mass and eggshell blue-green colouration in southern rockhopper penguins: a test of the sexual signalling hypothesis

@article{Dehnhard2015RelationshipsBF,
  title={Relationships between female quality, egg mass and eggshell blue-green colouration in southern rockhopper penguins: a test of the sexual signalling hypothesis},
  author={Nina Dehnhard and Rianne Pinxten and Laurent Demongin and Jeff Van Camp and Marcel Eens and Maud Poisbleau},
  journal={Polar Biology},
  year={2015},
  volume={38},
  pages={1805-1811}
}
Eggshell blue-green colouration (BGC) is caused by the pigment biliverdin which has antioxidant capacities. Eggshell BGC has therefore been interpreted as being costly for the female and therefore a signal of female quality (‘sexual signalling hypothesis’). Southern rockhopper penguins Eudyptes chrysocome exhibit both a reversed hatching asynchrony and a brood reduction strategy. First-laid (A-)eggs are smaller and hatch on average 1 day after second-laid (B-)eggs, with B-eggs usually producing… CONTINUE READING
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