Geographical variation in egg size dimorphism in rockhopper penguins

• Published in: Polar Biology
• Main Authors: Demongin, Laurent, Poisbleau, Maud, Raya Rey, Andrea Nélida, Schiavini, Adrian Carlos Miguel, Quillfeldt, Petra, Eens, Marcel, Strange, Ian J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer
• Subjects: CHICK SURVIVAL; EGG DIMORPHISM; GEOGRAPHICAL VARIATION; ROCKHOPPER PENGUIN; https://purl.org/becyt/ford/1.6; https://purl.org/becyt/ford/1; Austral; Nélida; Polar Biology; Rockhopper penguin
• Online Access: http://hdl.handle.net/11336/128940

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 popu...