Experiments in gear configuration to reduce bycatch in an estuarine squid-trawl fishery

Scandol, James P. and Underwood, Tony J. and Broadhurst, Matt K. (2006) Experiments in gear configuration to reduce bycatch in an estuarine squid-trawl fishery. Fishery Bulletin, 104(4), pp. 533-541.

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Abstract

Three experiments were performed in an estuarine squid-trawl fishery in New South Wales, Australia, to test modifications to trawl nets. Lateral mesh openings were experimentally increased and physical bycatch reduction devices (BRDs) were placed in codends. These modifications aimed to reduce nontargeted catches of fish, while maintaining catches of the targeted broad squid (Photololigo etheridgei) and bottle squid (Loliolus noctiluca). Compared to conventional codends made with 41-mm diamond mesh, codends made with different posterior circumferences and larger 45-mm mesh had no significant effect on the catches of any species. The best performing configurations involved the installation of BRDs designed to separate organisms according to differences in behavior. In particular, versions of a composite square-mesh panel reduced the total weight of bycatch by up to 71% and there was no significant effect on the catches of squid. The results are discussed in terms of the probable differences in behavior between fish and squid in codends. After this study, a square-mesh panel BRD was voluntarily adopted throughout the fishery.

Item Type: Article
Title: Experiments in gear configuration to reduce bycatch in an estuarine squid-trawl fishery
Personal Creator/Author:
CreatorsEmail
Scandol, James P.
Underwood, Tony J.
Broadhurst, Matt K.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 104
Number: 4
Page Range: pp. 533-541
Date: 2006
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8946
Depositing User: Patti M. Marraro
Date Deposited: 27 Jun 2012 19:30
Last Modified: 27 Jun 2012 19:30
URI: http://aquaticcommons.org/id/eprint/8946

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