mid-net zipper ridge a possible cause of unobserved porpoise mortality
By: David B. Holts.
Contributors: Southwest Fisheries Center (U.S.)
Series: NOAA-TM-NMFS-SWFC -- 3; NOAA technical memorandum NMFS SWFC -- 3.
Publisher: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Center
Published: 1980
Place of publication: La Jolla, Calif
Language: eng
Subjects: Porpoises.; Purse seining.
Notes: "May 1980"--Cover.