A White-capped Albatross, Thalassarche [cauta] steadi, at South Georgia: first confirmed record in the south-western Atlantic
Ben Phalan A , Richard A. Phillips A C and Michael C. Double BA British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
B School of Botany and Zoology, Australian National University, Canberra, ACT 0200, Australia.
C Corresponding author. Email: raphil@bas.ac.uk
Emu 104(4) 359-361 https://doi.org/10.1071/MU03057
Submitted: 17 November 2003 Accepted: 16 August 2004 Published: 16 December 2004
Abstract
Although albatrosses typically show strong natal philopatry, a small proportion of birds emigrate to distant colonies, occasionally establishing new breeding sites and potentially initiating speciation events. Patterns of albatross distribution and speciation may be determined largely by the behaviour of these few wayward individuals. In February 2003, a male White-capped Albatross, Thalassarche [cauta] steadi (identified from DNA), was observed in a colony of Black-browed Albatrosses, T. melanophrys, at Bird Island, South Georgia. It returned to the same colony the following austral spring. Although there have been previous records of shy-type albatrosses (T. [cauta] steadi or T. [cauta] cauta) in the south-western Atlantic Ocean, this is the first confirmed record of either taxon, and indicates the potential for colonisation, over 10 000 km from its present breeding range.
Acknowledgments
We thank Cathryn Abbott for her assistance with the genetic analysis; and Keith Reid, John Croxall and two anonymous referees for commenting on the manuscript.
Abbott, C. L. , and Double, M. C. (2003a). Phylogeography of shy and white-capped albatrosses inferred from mitochondrial DNA sequences: implications for population history and taxonomy. Molecular Ecology 12, 2747–2758.
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