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    Diving location and depth of breeding chinstrap penguins during incubation and chick-rearing period in King George Island, Antarctica

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    Numéro du document:
    W.Y. Lee, S. Park, N. Choi, K.W. Kim, H. Chung and J.-H. Kim
    Soumis par:
    Seok-Gwan Choi (Corée, Rép. de)
    Approuvé par:
    Seok-Gwan Choi (Corée, Rép. de)
    Kor. J. Orni., 23 (1) (2016): 41–48

    Breeding birds can increase their foraging efforts to feed chicks after hatching. We investigated how chinstrap penguins (Pygoscelis antarctica) differ foraging diving behaviors with breeding stages. During incubation and chick-rearing period, from December 2015 to January 2016 on King George Island, Antarctica, diving characteristics of breeding chinstrap penguin parents were recorded by deploying GPS and Time-Depth Recorder (TDR). Our results showed that chinstrap penguins have wider-range diving areas and longer foraging trips during incubation period while they dive in on-shore areas for a short trip hours during chick-rearing period. In addition, chinstrap penguins exhibited deeper dive depths during chick-rearing than during incubation. Our results suggest that chinstrap parents change their foraging area and dive depth between incubation and chick-rearing, possibly due to the increased need of chick-feeding and the temporal changes in prey availability between the two reproduction stages.