Geographical variation in egg size dimorphism in rockhopper penguins

@article{Demongin2009GeographicalVI,
  title={Geographical variation in egg size dimorphism in rockhopper penguins},
  author={Laurent Demongin and Maud Poisbleau and Andrea Raya Rey and Adri{\'a}n C. M. Schiavini and Petra Quillfeldt and Marcel Eens and Ian J. Strange},
  journal={Polar Biology},
  year={2009},
  volume={33},
  pages={469-476}
}
All crested penguins present a unique reversed hatching asynchrony: the larger second-laid egg (B-egg) hatches before the smaller first-laid egg (A-egg). Although both eggs often hatch, the A-chick generally dies of starvation within days after hatching. However, within rockhopper penguins, the population at the Falkland Islands is unique in that some birds manage to raise both chicks. Although it has been suggested that the egg size dimorphism between A- and B-eggs may explain how long both… CONTINUE READING

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