Maximum diving depths of northern rockhopper penguins (Eudyptes chrysocome moseleyi) at Amsterdam Island |
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Authors: | Yann Tremblay Eric Guinard Y Cherel |
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Institution: | (1) Centre d’Etudes Biologiques de Chizé, Centre National de la Recherche Scientifique, F-79360 Villiers-en-Bois, France fax: 49 09 65 26, FR |
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Abstract: | The mean maximum dive depth from 49 foraging bouts by northern rockhopper penguins, measured using capillary-tube depth gauges,
was 66±4 m (12–168 m). There were no differences in the maximum dive depths between male and female penguins. Northern rockhopper
penguins dived deeper in early than in late creche stages (83±7 vs 57±4 m), and this was associated with probable dietary
changes, squid dominating the diet by mass (44%) in November, and fish (64%) in December 1994 at Amsterdam Island.
Received: 10 January 1996/Accepted: 31 March 1996 |
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