Configurations and relative efficiencies of shrimp trawls employed in southeastern United States waters

Watson, Jr., John W. and Workman, Ian K. and Taylor, Charles W. and Serra, Anthony F. (1984) Configurations and relative efficiencies of shrimp trawls employed in southeastern United States waters. NOAA/National Marine Fisheries Service, (NOAA Technical Report NMFS, 3)

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Abstract

Common shrimp trawl designs employed in the southeastern United States shrimp fishery are the flat, balloon, semiballoon, jib, and super X-3. Recent innovations in trawl design and rigging, including the twin trawl rigging and tongue trawl design, have improved the efficiency of shrimp trawling gear. A description of the construction techniques for the different designs indicate differences which affect gear performance. Measurements of horizontal spread and vertical opening for 76 trawl configurations indicate the relative efficiencies of the different designs. Maximum horizontal spreading efficiency was achieved by the "twin" and "tongue" trawl designs followed by the super X-3, jib, balloon, and semiballoon designs. Designs having the greatest vertical openings were the tongue and flat trawl designs followed by the semiballoon. Maximum total gape dimension was demonstrated by the "Mongoose" tongue trawl. Comparison of trawl spreading efficiency and door area to headrope length ratio indicates that a range of 70-80 in square (per door) of door area is required for each foot of trawl headrope length for maximum efficiency with conventional trawl designs and 66-75 in square per foot of headrope for tongue trawl designs. (PDF file contains 18 pages.)

Item Type: Monograph or Serial Issue
Title: Configurations and relative efficiencies of shrimp trawls employed in southeastern United States waters
Personal Creator/Author:
CreatorsEmail
Watson, Jr., John W.
Workman, Ian K.
Taylor, Charles W.
Serra, Anthony F.
Series Name: NOAA Technical Report NMFS
Number: 3
Date: 1984
Publisher: NOAA/National Marine Fisheries Service
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Management
Fisheries
Item ID: 2819
Depositing User: Patti M. Marraro
Date Deposited: 13 Nov 2009 12:49
Last Modified: 29 Sep 2011 18:19
URI: http://aquaticcommons.org/id/eprint/2819

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