Polar Biology

, Volume 30, Issue 5, pp 651–654 | Cite as

Decline of the breeding population of Pygoscelis antarctica and Pygoscelis adeliae on Penguin Island, South Shetland, Antarctica

  • Martin Sander
  • Tatiana Coelho Balbão
  • Erli Schneider Costa
  • Cesar Rodrigo dos Santos
  • Maria Virgínia Petry
Short Note

Abstract

This work is a quantitative analysis of the population of breeding pairs of Pygoscelis adeliae and Pygoscelis antarctica, which use Penguin Island as a breeding area. There was a decrease in the populations of P. adeliae and P. antarctica by 75 and 66%, respectively, from the breeding season of 1979/1980 to 2003/2004. A mixed breeding colony of both species was also documented, according to published data which has existed since 1979/1980. The P. antarctica has an advantage over P. adeliae in this mixed breeding situation, where the breeding pairs of the former increased by 127%, indicating an interspecies competition for nesting ground.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Martin Sander
    • 1
  • Tatiana Coelho Balbão
    • 1
  • Erli Schneider Costa
    • 1
  • Cesar Rodrigo dos Santos
    • 1
  • Maria Virgínia Petry
    • 1
  1. 1.Laboratory of Ornithology and Marine AnimalsUniversidade do Vale do Rio dos SinosSão LeopoldoBrazil

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