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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Autónoma de Baja California
2004
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48003001 |
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Table of Contents:
- Effects of Nordmøre-grid angles, profiles and other industry-developed modifications on catches in an Australian penaeid-trawl fishery Matt K. Broadhurst Damian J. Young Cristiana Damiano Ciencias de la Tierra grid prawn shrimp Nordmøre selectivity In response to claims that conventional Nordmøre-grids used in the Clarence River penaeid-trawl fishery were occasionallybeing fouled or blocked during fishing, two experiments were done to examine the utility of modified grids with differentinstallation angles, sizes and profiles, and alternative industry-developed, behavioral-type bycatch reduction devices (BRDs). Inexperiment 1, a conventional Nordmøre-grid (600 mm in length, installed at 45º) was compared against a longer grid (1200 mmin length, installed at 21º) and two locally-developed, behavioral-type BRDs. While slightly more difficult to operate than theconventional design, the longer Nordmøre-grid retained similar quantities of penaeids and bycatch; in contrast, both behavioraltypeBRDs retained significantly (up to five times) more bycatch and were considered ineffective for use in this fishery. Inexperiment 2, the conventional Nordmøre-grid was tested against three modified Nordmøre-grids, including a 600-mm-long gridwith a curved profile and installed at 45º, and two grids, both 900 mm in length and installed at 28º, but with flat and curvedprofiles. Only the curved 900-mm Nordmøre-grid caught significantly fewer penaeids and bycatch, although both of the curvedprofilegrids appeared to facilitate the release of debris from the trawl. The results are discussed in terms of fishery-specificfactors that probably contributed towards the performances of the various BRDs. 2004 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003001 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.30