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    Numbers of calling whales in the North Pacific

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    WHOI-2001-16.pdf (2.690Mb)
    Date
    2001-11
    Author
    Watkins, William A.  Concept link
    Daher, Mary Ann  Concept link
    George, Joseph E.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/29
    Location
    North Pacific
    DOI
    10.1575/1912/29
    Keyword
     Numbers of calling whales; North Pacific whales; SOSUS arrays monitor whales 
    Abstract
    Since November 1995, the U. S. Navy's Sound Surveillance System (SOSUS) and other hydrophone arrays were used to regularly sample the occurance of whale sounds in the four regions bordering the continental margins across the North Pacific. The numbers of whales heard calling varied with the season and location for each species, Blue whales (Balaenoptera musculas), fin whales (Balaenoptera physalus), and humpback whales (Megaptera novaeangliae). For blue whales, calling during the fall season averaged 5 whales per event, winter averaged 1.5 whales per event, spring averaged 1 whale, and summer averaged 1.5 whales. For fin whales the number of whales heard ("F" calls from individuals) during winter averaged 3 whales per event, spring and fall calling averaged 1.5 whales, and summer averaged 1 whale. The "J" calling events, regardless of season, were judged to be from at least 6 fin whales. Humpback singing typically was from 3 whales. These numbers demonstrated seasonal variations in calling whales for each region.
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    Suggested Citation
    Watkins, W. A., Daher, M. A., & George, J. E. (2001). Numbers of calling whales in the North Pacific. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/29
     

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