Contribution No. 21 to research conducted with the approval of the 

 United States Section of the International North Pacific Fisheries 

 Commission, The Commission, established in 1953 by the International 

 Convention for the High Seas Fisheries of the North Pacific Ocean, 

 coordinates the research of the member nations: Japan, Canada, and 

 the United States. The resulting investigations provide data to the 

 Commission for use in carrying out its duties in connection with fishery 

 conservation problems in the North Pacific Ocean. Publication of this 

 scientific report has been approved by the United States Section of the 

 Commission. 



