RANGE-WIDE SURVEY AND ESTIMATION OF TOTAL NUMBER OF STELLER SEA LIONS IN 1989

Authors

  • Thomas R. Loughlin,

    1. National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, 7600 Sand Point Way, N.E., BIN C15700, Seattle, Washington 98115-0070
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  • Adolf S. Perlov,

    1. Pinnipeds Section, Pacific Research Institute of Marine Fisheries and Oceanography (TINRO), Shevchenko Alleye, 4, Vladivostok, Russia 690600
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  • Valery A. Vladimirov

    1. Marine Mammal Laboratory, All-Union Research Institute of Marine Fisheries and Oceanography (VNIRO), V. Krasnoselskaya, 17, Moscow, Russia 107140
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Abstract

Abstract: The first range-wide survey of Steller (northern) sea lions (Eumetopias jubatus) was completed in 1989 with a total of 68,094 adult and juvenile (nonpup) Steller sea lions counted. This total count includes 10,000 in Russia (15% of the range-wide count), 47,960 in Alaska (70%), 6,109 in British Columbia (9%), 2,261 in Oregon (3%), and 1,764 in California (3%). A range-wide pup count was not obtained. We estimated the 1989 world population based on a calculation for total pups and obtained a range-wide estimate of 116,000 total animals, or about 39–48% of the 240,000-300,000 estimated 30 yr ago.

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