The Fish Funnel: A Trawl Modification to Reduce Fish Escapement

Workman, Ian K. and Taylor, Charles W. (1989) The Fish Funnel: A Trawl Modification to Reduce Fish Escapement. Marine Fisheries Review, 51(2), pp. 23-27.

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Official URL: http://spo.nmfs.noaa.gov/mfr512/mfr5122.pdf

Abstract

In the Gulf of Mexico there is a need to assess the potential of underutilized fish resource stocks before a commercial fishery develops. Standard sampling trawls used in the Gulf are ineffective for sampling the resource, so larger, high opening, bottom trawls have been introduced. The larger trawls are more effective, but most of the faster swimming fish species are able to escape these nets, especially during haul back. To reduce fish escapement, webbing panels, attached inside the trawls ahead of the cod ends, were tested. Initial tests were conducted with two single panel designs--a fish flap and a "floppa." Neither design reduced fish escapement. The floppa distorted the trawl webbing and actually increased fish escapement. A multi-panel conical funnel design (the fish funnel) was tested and found to increase fish retention by trapping the fish after they passed through it. When used in combination with a technique known as pulsing the trawl, the fish funnel substantially increased trawl catch rates with no indication of fish escapement.

Item Type: Article
Title: The Fish Funnel: A Trawl Modification to Reduce Fish Escapement
Personal Creator/Author:
CreatorsEmail
Workman, Ian K.
Taylor, Charles W.
Refereed: Yes
Journal or Publication Title: Marine Fisheries Review
Volume: 51
Number: 2
Page Range: pp. 23-27
Date: 1989
ISSN: 0090-1830
Issuing Agency: United States National Marine Fisheries Service
Subjects: Fisheries
Management
Item ID: 9941
Depositing User: Patti M. Marraro
Date Deposited: 22 Aug 2012 13:42
Last Modified: 22 Aug 2012 13:42
URI: http://aquaticcommons.org/id/eprint/9941

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