U.S. DEPARTMENT OF COMMERCE 



Robert Mosbacher, Secretary 



National Oceanic and Atmospheric Administration 



John A. Knauss, Under Secretary for Oceans and Atmosphere 



National Marine Fisheries Service 



William W. Fox, Jr., Assistant Administrator for Fisheries 



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Tlie Fis/jerv Biillelui carries (original researcli 

 reports and technical notes on investigations in 

 fishery science, engineering, and economics. 

 The Bulletin of the United States Fish Commis- 

 sion was begun in 1881; it became the Bulletin 

 of the Bureau of Fisheries in 1904 and the 

 Fishery Bulletin of the Fish and Wildlife .Ser- 



\ice in 19^1. Separates were issued as ducu- 

 ments ilirough volume 46; the last document 

 was No. 1103. Beginning with volume 47 in 1931 

 and continuing through volume 62 in 1963, 

 each separate appeared as a numbered bulle- 

 tin. A new system began in 1963 with volume 63 

 in which papers are bound together in a single 



issue of the bulletin instead ui being is.sued in- 

 dividually Beginning with volume 70, number 

 1, January 1972, the Fislxiy Biillethi became 

 a periodical, issued cjuarterly. It is available 

 free in limited numbers to libraries, research 

 institutions. State and Federal agencies, and 

 in exchange for other scientific publications. 



Scientific Editor 



Dr. Andrew E. Dizon 



Southwest Fisheries Center 



LaJolla Laboratory 



National Marine Fisheries Service, NOAA 



P.O. Box 271, LaJolla, CA 92038 



Editorial Committee 



Dr. Jay Barlow 



National Marine Fisheries Service 



Dr. William H. Bayliff 



Inter-American Tropical Tuna Commission 



Dr. George W. Boehlert 

 National Marine Fisheries Service 



Dr. Bruce B. Collette 



National Marine Fisheries Service 



Dr. Robert C. Francis 

 University of Washington 



Dr. James R. Kitchell 

 University of Wisconsin 



Dr. William J. Richards 

 National Marine Fisheries Service 



Dr. Tim D. Smith 



National Marine Fisheries Service 



Managing Editor 



Mary S. Fukuyama 



Ihel-iilxiy iinllelni ( ISS.N ouvu-UhSd ) is publislied ciiurtcrly by the Scieniitic Pulihcauon> Otlicc, i\'.iiii)nal Marine Fisheries Service, NOM. ""ouii .Sand Hoiiii \X ;i\- .N t. bl.N 



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Although the contents have not been copyriglned ami may be reprinted entirely reference to source is appreciated. 



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