Polar Biology

, Volume 30, Issue 5, pp 659–661 | Cite as

Recent decrease in chinstrap penguin (Pygoscelis antarctica) populations at two of Admiralty Bay’s islets on King George Island, South Shetland Islands, Antarctica

  • Martin Sander
  • Tatiana Coelho Balbão
  • Michael John Polito
  • Erli Schneider Costa
  • Ana Paula Bertoldi Carneiro
Short Note


We examined the breeding populations of chinstrap penguins (Pygoscelis antarctica) on Chabrier Rock and Shag Island within Admiralty Bay, King George Island, South Shetland Islands, Antarctica from 2002 to 2004. When comparing our results to historic data from 1979, we found an overall decline of 57% in the last 25 years, mirroring the population trend of this species in other regions of the Antarctic Peninsula. Our results are discussed in relation to factors hypothesized to be driving the declines found at other sites, as well as the importance of consistent annual censuses to accurately determine population trends.


Chinstrap penguin Chinstrap populations Antarctic birds 



Our thanks to the National Council of Scientific and Technological Development (CNPq), the Secretary of the Inter-ministerial Commission for the Resources of the Sea (SeCIRM) and the field assistants from the Laboratory of Ornithology and Marine Animals of the Universidade do Vale do Rio dos Sinos.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Martin Sander
    • 1
  • Tatiana Coelho Balbão
    • 1
  • Michael John Polito
    • 2
  • Erli Schneider Costa
    • 3
  • Ana Paula Bertoldi Carneiro
    • 1
  1. 1.Laboratory of Ornithology and Marine AnimalsUniversidade do Vale do Rio dos SinosSão LeopoldoBrazil
  2. 2.Department of Biology and Marine BiologyUniversity of North Carolina at WilmingtonWilmingtonUSA
  3. 3.Ecology Pos-graduate ProgramUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil

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