U.S. Department 

 of Commerce 



Donald L Evans 

 Secretary 



National Oceanic 

 and Atmospheric 

 Administration 



Vice Admiral 



Conrad C. Lautenbacher Jr., 



USN (ret.) 



Under Secretary for 

 Oceans and Atmosphere 



National Marine 

 Fisheries Service 



William T. Hogarth 



Assistant Administrator 

 for Fisheries 



^tf" ^, 



s r ATES f 



The Fishery Bullet in (ISSN 0090-0656) 

 is published quarterly by the Scientific 

 Publications Office, National Marine Fish- 

 eries Service. NOAA. 7600 Sand Point Way 

 NE, BIN C15700,Seattle,WA98115-0070. 

 icals postage is paid at Seattle, WA, 

 and at additional mailing offices. POST- 

 MASTER: Send address changes for sub- 

 scriptions to Fishery Bulletin, Superin- 

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 List Branch, Mail Stop SSOM. Washing- 

 ton. DC 20402-9 



Although the contents of this publica- 

 tion have not been copyrighted and may 

 be reprinted entirely, reference to source 

 is appreciated 



The Secretary of Commerce lias deter- 

 mined that the publication of this pen 

 ording to law for 

 insaction of pubh of this 



Department. Use of funds for printing of 

 this periodical has been approved by the 

 ir of the l Mine of Management and 

 Budget. 



For salt- by the Superintendent of 

 Documents. rnment Printing 



Office. Washington, DC 20402. Subscrip- 

 tion price per year: $55.00 domestic and 

 foreign. Cost per aingle issue: 

 $28.00 domi gn. See 



back for order form. 



Scientific Editor 



Dr. Norman Bartoo 



Associate Editor 



Sarah Shoffler 



National Marine Fisheries Service, NOAA 

 8604 La Jolla Shores Drive 

 La Jolla, California 92037 



Managing Editor 



Sharyn Matriotti 



National Marine Fisheries Service 

 Scientific Publications Office 

 7600 Sand Point Way NE, BIN C15700 

 Seattle, Washington 98115-0070 



Editorial Committee 



Dr. Harlyn O. Halvorson 

 Dr. Ronald W. Hardy 

 Dr. Richard D. Methot 

 Dr. Theodore W. Pietsch 

 Dr. Joseph E. Powers 

 Dr. Harald Rosenthal 

 Dr. Fredric M. Serchuk 

 Dr. George Waiters 



University of Massachusetts, Boston 

 University of Idaho, Hagerman 

 National Marine Fisheries Service 

 University of Washington, Seattle 

 National Marine Fisheries Service 

 Universitat Kiel, Germany 

 National Marine Fisheries Service 

 National Marine Fisheries Service 



Fishery Bulletin web site: www.fishbull.noaa.gov 



The Fishery Bulletin carries original research reports and technical notes on investigations in 

 fishery science, engineering, and economics. It began as the Bulletin of the United Stat. 

 Commission in 1881 i be one the Bulletin of the Bureau of in 1904 and the Fishery 



Bulletin of the Fish and Wildlife Service in 1941. Separates were issued as documents through 

 volume 46; the last document was No. 1103. Beginning with volume 17 in 19:!1 and continuing 

 through volume 62 in 1963, each separate' appeared as a numbered bulletin. A new system 

 began in 1963 with volume 63 in which papers arc bound together in a single issue of the 

 bulletin. Beginning with volume 70, number 1. January 1972, the Fishery Bulletin bee 

 quarterly. In this form, it is available by subscription from the Superinte 

 of Documents, U.S. < kn eminent Printing ( illice. Washington. DC 20402. It is also available 

 limited numbers to libraries, research institutions, Stale and Federal agencies, and in exchange 

 for other scientific publicat ii 



