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Long-term population increase of black-browed albatrosses Thalassarche melanophrys at Heard Island, 1947/1948 – 2000/2001

journal contribution
posted on 2023-05-18, 16:31 authored by Woehler, EJ, Heidi AumanHeidi Auman, Riddle, MJ
The breeding population of the black-browed albatross Thalassarche melanophrys has increased at Heard Island since the first census data were obtained in 1947/1948. Four breeding localities are known, and all populations have increased in the period 1947/1948–2000/2001. The breeding population is estimated to have been approximately 200 pairs in 1947/1948. Based on 2000/2001 census data, the population has increased to a minimum of approximately 600 pairs over the 53 years. Two mechanisms, that of increased prey availability through scavenging discards from trawlers operating within their foraging range, and climatic amelioration, are proposed as hypotheses for this increase.

History

Publication title

Polar Biology

Volume

25

Issue

12

Pagination

921-927

ISSN

0722-4060

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag

Place of publication

175 Fifth Ave, New York, USA, Ny, 10010

Rights statement

Copyright 2012 Springer-Verlag

Repository Status

  • Restricted

Socio-economic Objectives

Marine biodiversity

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