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    Occurrence and Habitat Use of Marine Mammals at Santa Catalina Island, California from 1983-91

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    Subject
    Habitat; Marine Mammals; Santa Catalina Island; California; 1983-91
    Author
    Shane, Susan H.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    93
    Issue
    scas/vol93/iss1; 1
    Metadata
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    URI
    https://scholar.oxy.edu/handle/20.500.12711/10024
    Abstract
    A nine-winter-long study (1983-91) of marine mammals at Santa Cat- <br /><br />alina Island, California provided data on the ecological relationships among three <br /><br />pinniped and nine cetacean species observed there. A dramatic reduction in the <br /><br />number of California sea lions occurred during and following the winter with the <br /><br />most severe effects from the 1983 El Nino. The most striking change in cetacean <br /><br />occurrence was a precipitous decline in pilot whale numbers followed by an <br /><br />increase in abundance of Risso's dolphins. The six most often-sighted cetaceans <br /><br />appeared to partition the habitat according to water depth and distance from <br /><br />shore.
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