Accession Number : AD0636944

Title :   ISAACS-BROWN OPENING, CLOSING TRAWL.

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CALIF

Personal Author(s) : Isaacs, John D. ; Brown,Daniel M.

Report Date : 27 JUL 1966

Pagination or Media Count : 42

Abstract : It has been apparent for some years that marine life is vertically stratified. The understanding of the importance and nature of the animal distribution both vertically and horizontally is essential in the studies of fisheries, engineering, and acoustics. Large opening and closing nets are necessary in the understanding of this distribution. The Isaacs-Kidd Midwater Trawl is one of the more widely used and effective big nets around, and so a means was devised that would convert this proven net into an opening and closing one and by so doing would add an extremely useful tool to the field of marine biology. The Isaacs-Brown O/C Trawl was designed to make possible the conversion of the existing grawls, and to initiate opening by using an internal flap in the mouth of the net so that when the net was opened, an uncontaminated sample could be obtained. Field trials and tests proved the feasibility and utility of the design. (Author)

Descriptors :   (*MARINE BIOLOGY, *SAMPLERS), (*NETS, MARINE BIOLOGY), COLLECTING METHODS, TOWED BODIES, POROUS MATERIALS, MARINE ENGINEERING

Subject Categories : Biological Oceanography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE