Foraging behaviour of emperor penguins as a resource detector in winter and summer
Article Abstract:
New information on the migratory and feeding habits of emperor penguins (Aptenodytes forsteri) in Antarctica has been obtained through satellite tracking. The Argos satellite was used to follow nine penguins for 143 days during two studies, one in Aug 1990 in Adelie Land and the second in Oct-Dec 1990 in the Western Ross Sea. The birds, which obtain their food at sea, went as far as 296 kilometers (km) over polynias or regions of open water and as far as 895 km through light pack-ice. The penguins also stopped often along the way to feed and were unexpectedly found to dive to the ocean bottom.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Penguin dispersal after fledging
Article Abstract:
Antarctica's Emperor penguins take care of their young for some five months, after which the young birds leave their nests and disappear for several years. Satellite tracking of several tagged juvenile penguins shows that they travel far beyond the Ross Sea, with one bird traveling 2,845 km away from its natal colony. They headed north to the Antarctic Convergence and the swung east towards balmier waters. This could put young birds in contact with commercial fishermen, many of whom are starting to expand operations into the area.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Hypothermia in foraging king penguins
Article Abstract:
King and emperor penguins can dive for long periods, and their dive durations can exceed the aerobic dive limit, or the amount of time before all stored oxygen is used. Their short surface intervals between dives are not consistent with recovery times linked to anaerobic metabolism. It is shown that the abdominal temperature of a king penguin can fall as low as 11 deg C, during long periods of diving. It is assumed that their slower metabolism of cooler tissues, partly explains why they can dive for long periods.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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