annotated bibliography of fisheries economics literature - Office of ...

This report presents the progress and status of the sea turtle excluder
trawl development projects and describes the research objectives planned for
FY81. Data are presented on comparative catch rates between two turtle
excluder designs and standard shrimp trawls. Data are also presented on the
effect of reduced tow time and resuscitation of comatose turtles on sea turtle
mortality in shrimp trawls.
Watson, John W. (1984). "Sea Turtle Excluder Trawl, FY 1984 Project
Report." Draft report, Division of Harvesting Systems and Surveys,
Mississippi Laboratories, Southeast Fisheries Center, National
Marine Fisheries Service.
The TED project goal for FY 1984 was to encourage and accelerate
voluntary use of the TED technology in the southeastern shrimp fishery by
improving the handling and operational characteristics of the TED and improve
and demonstrate the finfish reduction potential of the TED during both
nocturnal and diurnal periods.
Watson, John W., John F. Mitchell, and Arvind K. Shah (1985). "Trawling
Efficiency Device: A New Concept for Selective Shrimp Trawling
Gear." Draft report, National Marine Fisheries Service, Southeast
Fisheries Center, Mississippi Laboratories, Pascagoula, MS.
The Trawl Efficiency Device (TED) is inserted between the body and cod
end of a shrimp trawl. A steel grid and trap door ejects unwanted shrimp
bycatch such as turtles, sharks, rays, jellyfish, crabs, sponge, etc. The TED
also can be used to reduce finfish bycatch by employing a finfish deflector
grid, leading panels, and exit openings. The device eliminates finfish by
taking advantage of the difference in swimming ability and behavior between
finfish and shrimp. Shrimp are carried into the cod end by accelerating water
flow through the device with a webbing funnel. Finfish are stimulated into an
escape reaction by a finfish deflector grid and are guided to exit openings by
leading panels. Finfish separation rates averaging 78 percent and 53 percent
were achieved during day trawling and night trawling, respectively, with no
significant difference in shrimp catch rates. Finfish separation rates varied
by species and total separation varied as a function of catch composition.
The TED is being introduced into the shrimp fishery in the southeastern United
States to reduce incidental turtle captures, conserve finfish resources
discarded by the shrimp fleet, and increase trawling efficiency.
Watson, John W., John F. Mitchell, and Arvind K. Shah (1986). "Trawling
Efficiency Device: A New Concept for Selective Shrimp Trawling
Gear." Marine Fisheries Review, 48(1):1-9.
The Trawling Efficiency Device (TED) is inserted between the body and
cod end of a shrimp trawl. A steel grid and trap door ejects unwanted shrimp
bycatch such as turtles, sharks, rays, jellyfish, crabs, sponge, etc. The TED
also can be used to reduce finfish bycatch by employing a finfish deflector
grid, leading panels, and exit openings. The device eliminates finfish by
taking advantage of the difference in swimming ability and behavior between
finfish and shrimp. Shrimp are carried into the cod end by accelerating water
flow through the device with a webbing funnel. Finfish are stimulated into an
escape reaction by a finfish deflector grid and are guided to exit openings by
leading panels. Finfish separation rates averaging 78 percent and 53 percent
were achieved during day trawling and night trawling, respectively, with no
significant difference in shrimp catch rates. Finfish separation rates varied
by species and total separation varied as a function of catch composition.
The TED is being introduced into the shrimp fishery in the southeastern United
States to reduce incidental turtle captures, conserve finfish resources
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