Revised 01/15/2011 BLUE WHALE (Balaenoptera musculus musculus): Eastern North Pacific

(IWC) has formally considered only one management stock for blue whales in the North Pacific (Donovan 1991), but this ocean is thought to include more than one population (Ohsumi and Wada 1972; Braham 1991), possibly as many as five (Reeves et al. 1998). Blue whales in the North Pacific produce two...

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Bibliographic Details
Main Authors: Stock Definition, Geographic Range
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
For the Marine Mammal Protection Act (MMPA) stock assessment reports
the Eastern North Pacific S
Gulf of Alaska
Kamchatka Peninsula
Pacific
Reeves
Balaenoptera musculus
Blue whale
Kamchatka
Alaska
Aleutian Islands
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.233.6158
http://www.nmfs.noaa.gov/pr/pdfs/sars/po2010whbl-en.pdf
Description
Summary:(IWC) has formally considered only one management stock for blue whales in the North Pacific (Donovan 1991), but this ocean is thought to include more than one population (Ohsumi and Wada 1972; Braham 1991), possibly as many as five (Reeves et al. 1998). Blue whales in the North Pacific produce two distinct, stereotypic calls that have been termed the northwestern and northeastern call types, and it has been proposed that these represent two distinct populations with some degree of geographic overlap (Stafford et al. 2001, Stafford 2003). The northeastern call predominates in the Gulf of Alaska, the U.S. West Coast, and the eastern tropical Pacific, and the northwestern call predominates from south of the Aleutian Islands to the Kamchatka Peninsula in Russia, though both call types have been recorded concurrently in the Gulf of

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