The mid-net zipper ridge a possible cause of unobserved porpoise mortality
By: David B. Holts.
Series: NOAA technical memorandum NMFS SWFC -- -3.; NOAA-TM-NMFS-SWFC -- 3.
Publisher: 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: "NOAA-TM-NMFS-SWFC-3".

Also issued online.