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Effects of El Niño on the Foraging Energetics of the California Sea Lion

  • D. P. Costa
  • G. A. Antonelis
  • R. L. DeLong
Part of the Ecological Studies book series (ECOLSTUD, volume 88)

Abstract

For a marine mammal foraging on widely dispersed prey items, the distribution and availability of prey and its species composition determine the rate of energy expenditure and acquisition. Models of central place foraging, optimal diet choice, and maximization of energy intake have attempted to predict how an animal should behave under a given set of circumstances (Charnov 1976; Dunstone and O’Connor 1979; Orians and Pearson 1979; Pyke 1984; Kramer 1988). However, few studies have documented how the rate of energy acquisition is modified when environmental circumstances change dramatically during a catastrophic event, such as the 1982/83 El Niño (EN).

Keywords

Water Influx Trip Duration Female Body Mass Water Influx Rate Total Water Influx 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • D. P. Costa
  • G. A. Antonelis
  • R. L. DeLong

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