U.S. DEPARTMENTOFCOMMERCE 



Rogers C. B. Morton, Secretary 



NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION 



Robert M. White, Administrator 



NATIONALMARINE FISHERIESSERVICE 



Robert W. Schoning, Director 



Fishery Bulletin 



The Fishery Bulletin carries original research reports and technical notes on investigations 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. Beginning 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 instead of being issued individually. 

 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, 

 D.C. 20402. It is also available free in limited numbers to libraries, research institutions. State and Federal agencies, 

 and in exchange for other scientific publications. 



EDITOR 



Dr. Bruce B. Collette 



Scientific Editor, Fishery Bulletin 



National Marine Fisheries Service 



Systematics Laboratory 



National Museum of Natural History 



Washington, DC 20560 



Editorial Committee 



Dr. Elbert H. Ahlstrom 



National Marine Fisheries Service 



Dr. WiUiam H. Bayliff 



Inter-American Tropical Tuna Commission 



Dr. Roger F. Cressey, Jr. 

 U.S. National Museum 



Mr. John E. Fitch 



California Department of Fish and Game 



Dr. WilUam W. Fox, Jr. 

 National Marine Fisheries Service 



Dr. Marvin D. Grosslein 

 National Marine Fisheries Service 



Dr. Edward D. Houde 

 University of Miami 



Dr. Merton C. Ingham 



National Marine Fisheries Service 



Dr. Reuben Lasker 



National Marine Fisheries Service 



Dr. Jay C. Quast 



National Marine Fisheries Service 



Dr. Paul J. Struhsaker 



National Marine Fisheries Service 



Dr. Austin Williams 



National Marine Fisheries Service 



Kiyoshi G. Fukano, Managing Editor 



The Secretary of Commerce has determined that the publication of this periodical is necessary in the transaction of 

 the public business required by law of this Department. Use of funds for printing of this periodical has been approved 

 by the Director of the Office of Management and Budget through May 31, 1977. 



