Antarctic Science



Short Note

Killer whale harrassment of Adélie penguins at Ross Island


GRANT BALLARD a1 and DAVID G. AINLEY a2
a1 PRBO Conservation Science, 4990 Shoreline Highway 1, Stinson Beach, CA 94970, USA
a2 H.T. Harvey & Associates, 3150 Almaden Expressway, Suite 145, San Jose CA 95118, USA

Article author query
ballard g   [PubMed][Google Scholar] 
ainley dg   [PubMed][Google Scholar] 

On innumerable occasions, Adélie (Pygoscelis adeliae) and emperor penguins (Aptenodytes forsteri) have been observed in close proximity to killer whales (Orcinus orca), with no whale-penguin interactions reported. On the other hand, killer whales reportedly harass and eat seabirds on occasion (Walker 1968: p. 1122, Stacey et al. 1990, Williams et al. 1990). Killer whales are known to prey on young king penguins (A. patagonica) as they are fledging (Guinet 1992, Guinet & Bouvier 1995) and occasionally take emperor penguins (Mikhalev et al. 1981). Thomas et al. (1981) report killer whales chasing Adélies. Here we report the only observations of Adélie-killer whale interactions observed in nine field seasons on Ross Island.

(Received December 16 2004)
(Accepted March 15 2005)



Metrics