Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Between May 2004 and May 2005, we studied the horizontal-and vertical movements of foraging Galápagos penguins Spheniscus mendiculus during their breeding season to examine space use at sea and to compare theyolurne of water exploited by this penguin to those of other penguin species. A total of 23 adult penguins (11 males and 12 females) brooding chicks were fitted with GPS-depth recorders at the 3 main nesting sites on south-western Isabela Island. Birds moved between 1.1 and 23.5 km (mean = 5.2 ± 4.9 km) from the nest, concentrating foraging in a strip of sea within 1.0 km of the shore. Foraging trips lasted a mean of 8.4 ± 2.0 h. Although the deepest dive was 52:1 m, birds spent, on average, 90% of their time underwater at depths less than 6 m. Both foraging ranges and dive depths were below those predicted from allometric regressions derived from other penguin species. Applying the maximum values for movement to calculate space use, the Galápagos penguin exploits a maximum volume of water of < 1.4 km3, which is almost 90 times less than that predicted for its mass, and thus utilises only a small portion of the total potentially available upwelling area within the Galápagos Archipelago. © Inter-Research 2008.

Original publication

DOI

10.3354/esr00046

Type

Journal article

Journal

Endangered Species Research

Publication Date

21/12/2008

Volume

4

Pages

105 - 112