The mid-net zipper ridge a possible cause of unobserved porpoise mortality
By: David B. Holts
Contributors: Southwest Fisheries Center
Series: NOAA-TM-NMFS-SWFC -- 3; NOAA-TM-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