SALTONSTALL KENNEDY GRANT PROGRAM
Evaluation of Fish-Excluder Technology to....
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GRANT NUMBER: NA46FD0417           NMFS NUMBER:   93-NWR-014

REPORT TITLE: Evaluation of Fish Excluder Technology to Reduce Finfish Bycatch in the Ocean Shrimp Trawl Fishery

AUTHOR: Hannah, Robert W.; Jones, Stephen A. and Hoover, Vicki J.

PUBLISH DATE:  April 1, 1996

AVAILABLE FROM:  National Marine Fisheries Service, Northwest Region, 7600 Sand Point Way, NE, BIN C15700, Bldg. 1, Seattle, WA 98115.   PHONE: (206) 526-6117

ABSTRACT

The project evaluated the effectiveness of four types of fish excluders (3-,4-, and 8-inch mesh and the Nordmore Grate) in the ocean shrimp (Pandalus jordani) trawl fishery.  Assessment techniques included underwater video equipment and comparative fishing experiments employing side by side comparisons on double rigged shrimp vessels. All four fish excluders worked well in avoiding the catch of large fish, with the Nordmore Grate and 3-inch mesh excluding 100 percent of adult hake. All experimental devices excluded small fish but at a lesser rate.  Shrimp loss for the Nordmore Grate and 3-inch soft panel gear ranged from 0-10 percent, while the other devices experienced loss rates of 15-31 percent.  Overall, all of the soft panel fish excluders provided to be effective in reducing bycatch; however, shrimp loss rates must be minimized to encourage greater usage by the fleet. A videotape summarizing project activities and results is available.

 
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