Del 0 - Studies in Polar Research

Skua and Penguin

Predator and Prey

Häftad, Engelska, 2005

AvEuan Young,Euan (University of Auckland) Young,L. C. Bliss,A. C. Clarke

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Areas of barren rock and scree around the edge of Antarctica provide a breeding ground for two of the continent's most well-known species of bird: the south polar skua and the Adélie penguin. This book considers the relationship between these two species, taking as its study site Ross Island. Through detailed observations of the foraging ecology of the skua, the traditional view that skuas are totally dependent on penguin eggs and chicks for food is challenged. In addition, studies of the impact of skuas on penguin breeding and the extent to which the skua breeding cycle is functionally related to that of the penguin provide further evidence to suggest that the two species occur together independently as a consequence of limited breeding space, rather than as a result of a distinct predator-prey relationship.

Produktinformation

Utgivningsdatum2005-08-22
Mått170 x 244 x 25 mm
Vikt770 g
FormatHäftad
SpråkEngelska
SerieStudies in Polar Research
Antal sidor472
FörlagCambridge University Press
ISBN9780521018135

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Biovetenskap inom Naturvetenskap och teknik

1. Introduction; 2. The study area. Ross Island and the Cape Bird penguin colonies; 3. The range of foods available to the skuas at Cape Bird during the breeding season; 4. The biomass of penguin eggs and chicks on the Northern Colony; 5. Factors of penguin biology that constrain or assist skua predation; 6. Description of scavenging and predatory behaviour of skuas and the defensive behaviour of penguins; 7. The diversity and intensity of skua foraging behaviour on the penguin colony; 8. The amount of food taken by the skuas from the penguin colony; 9. The costs and returns of foraging at the colony and at sea; 10. Immediate impact of the contestants on each other; 11. Appreciating the penguins; 12. Associating together. The longer term implications; 13. Synthesis; Appendices; References; Index.