U.S. Department 
of Commerce 
William M. Daley 
Secretary 
National Oceanic 
and Atmospheric 
Administration 
D. James Baker 
Under Secretary for 
Oceans and Atmosphere 
National Marine 
Fisheries Service 
Rolland Schmitten 
Assistant Administrator 
for Fisheries 
The Fishery Bulletin (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, WA 98115- 
0070. Periodicals postage is paid at Se- 
attle, WA, and at additional mailing of- 
fices. POSTMASTER: Send address 
changes for subscriptions to Fishery Bul- 
letin, Superintendent of Documents, Attn.: 
Chief, Mail List Branch, Mail Stop SSOM, 
Washington, DC 20402-9373. 
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 has deter- 
mined that the publication of this peri- 
odical is necessary according to law for the 
transaction of public business of this De- 
partment. Use of funds for printing of this 
periodical has been approved by the Di- 
rector of the Office of Management and 
Budget. 
For sale by the Superintendent of 
Documents, U.S. Government Printing 
Office, Washington, DC 20402. Subscrip- 
tion price per year: $34.00 domestic and 
$42.50 foreign. Cost per single issue: 
$13.00 doemestic and $16.25 foreign. See 
back for order form. 
Scientific Editor 
Dr. John B. Pearce 
Editorial Assistant 
Laura Gamer 
Northeast Fisheries Science Center 
National Marine Fisheries Service, NOAA 
1 66 Water Street 
Woods Ftole, Massachusetts 02543-1097 
Editorial Committee 
Dr. Andrew E. Dizon National Marine Fisheries Service 
Dr. Harlyn O. Halvorson University of Massachusetts, Boston 
Dr. Ronald W. Hardy University of Idaho, Hagerman 
Dr. Richard D. Methot National Marine Fisheries Service 
Dr. Theodore W. Pietsch University of Washington, Seattle 
Dr. Joseph E. Powers National Marine Fisheries Service 
Dr. Harald Rosenthal Universitat Kiel, Germany 
Dr. Fredric M. Serchuk National Marine Fisheries Service 
Managing Editor 
Sharyn Matriotti 
National Marine Fisheries Service 
Scientific Publications Office 
7600 Sand Point Way NE, BIN C 1 5700 
Seattle, Washington 98115-0070 
The Fishery Bulletin carries original research reports and technical notes on investiga- 
tions in fishery science, engineering, and economics. The Bulletin of the United States 
Fish Commission was begun in 1881; it became the Bulletin of the Bureau of Fisheries 
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. Begin- 
ning with volume 47 in 1931 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 are bound together in a single issue of the bulletin. Beginning with 
volume 70, number 1, January 1972, the Fishery Bulletin became a periodical, issued 
quarterly. In this form, it is available by subscription from the Superintendent of 
Documents, U.S. Government Printing Office, Washington, DC 20402. It is also 
available free in limited numbers to libraries, research institutions, State and Federal 
agencies, and in exchange for other scientific publications. 
