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https://hdl.handle.net/1959.11/8562
Title: | Improving Selectivity in an Australian Penaeid Stow-net Fishery | Contributor(s): | Macbeth, William G (author); Broadhurst, Mathew K (author); Millar, RB (author) | Publication Date: | 2005 | Handle Link: | https://hdl.handle.net/1959.11/8562 | Abstract: | Two experiments were conducted in an Australian penaeid stow-net fishery to: (i) validate the use of a fine-meshed cover for determining the selectivity of codends, and (ii) use this cover to quantify and compare the selectivity of a conventional 30-mm diamond-mesh codend and two new square-mesh designs made from 20- and 30-mm mesh, hung on the bar. In the first experiment the codend cover had minimal impact on the fishing performance of the stow net. The 30-mm square-mesh codend tested during the second experiment significantly improved the selectivity of the stow net, measured as an increase in school prawn ('Metapenaeus macleayi' Haswell, 1879) carapace length at 50% probability of retention (L50), and a reduction in the unwanted bycatches of juvenile eastern king prawns ('Penaeus plebejus' Hess, 1865) and small, non-commercial fish. However, a concomitant increase in selection range (SR) indicated that unacceptable quantities of target-sized school prawns escaped. In contrast, the 20-mm square- and 30-mm diamond-mesh codends were virtually non-selective for the sizes of school prawns encountering the gear. Compared to the 30-mm diamond-mesh codend, the 20-mm square-mesh codend did, however, reduce the quantities of eastern king prawns and non-penaeid bycatch retained. The results are attributed to the geometries of the codends tested and provide directions for future research into modifications to improve the selectivity of stow nets. | Publication Type: | Journal Article | Source of Publication: | Bulletin of Marine Science, 76(3), p. 647-660 | Publisher: | University of Miami, Rosenstiel School of Marine and Atmospheric Science | Place of Publication: | United States of America | ISSN: | 0007-4977 1553-6995 |
Fields of Research (FoR) 2008: | 050209 Natural Resource Management | Socio-Economic Objective (SEO) 2008: | 830299 Fisheries- Wild Caught not elsewhere classified | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal | Publisher/associated links: | http://www.ingentaconnect.com/content/umrsmas/bullmar/2005/00000076/00000003/art00004 |
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Appears in Collections: | Journal Article |
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