Title A new high-latitude record for the macaroni penguin (Eudyptes chrysolophus) at Avian Island, Antarctica
Author Gorman, K.B.; Erdmann, E.S.; Pickering, B.C.; Horne, P.J.; Blum, J.R.; Lucas, H.M.; Patterson-Fraser, D.L.; Fraser, W.R.
Author Affil Gorman, K.B., Simon Fraser University, Department of Biological Sciences, Burnaby, BC, Canada. Other: University of Wisconsin- Madison
Source Polar Biology, 33(8), p.1155-1158. Publisher: Springer-Verlag, Berlin, Germany. ISSN: 0722-4060
Publication Date Aug. 2010
Notes In English. 19 refs. GeoRef Acc. No: 309110
Index Terms Antarctica--Adelaide Island; Antarctica--Antarctic Peninsula; Antarctica-- Anvers Island; Southern Ocean; Adelaide Island; Antarctic Peninsula; Antarctica; Anvers Island; Aves; Avian Island; biogeography; Chordata; ecology; habitat; Neornithes; physiology; reproduction; Sphenisciformes; subantarctic regions; Tetrapoda; Vertebrata
Abstract On 20 and 22 January 2007, we observed macaroni penguins (Eudyptes chrysolophus) on Avian Island, Antarctica, approximately 1 south of the Antarctic Circle along the Western Antarctic Peninsula (WAP) near Adelaide Island, a new high-latitude observational record for the species within this region of the continent. Additionally, we report several extra-limital sightings of macaroni penguins over the last decade at relatively lower latitudes along the WAP near Anvers Island, including observations of breeding attempts. Although vagrancy cannot be ruled out as a possible causal factor in our observations, we hypothesize that a climate-induced shift in the species' bio- geographic range may be in progress. In this context, our observations are similar to the well-documented range shifts and eventual establishment of breeding populations by other sub-Antarctic penguin species along the WAP, over the last three decades, in response to regional climate warming. We highlight that the few observations reported here do not provide conclusive evidence for any putative causal mechanism explaining the presence of macaroni penguins at locations outside their natural geographic range. However, our observations are important for developing a better understanding of the natural history of the species along the WAP.
URL http://hdl.handle.net/10.1007/s00300-010-0795-y
Publication Type journal article
Record ID 91200