Theoretical study of the effect of round straps on the selectivity in a diamond mesh cod-end

Type Article
Date 2006-09
Language English
Author(s) Herrmann B1, Priour Daniel2, Krag L1
Affiliation(s) 1 : Danish Inst Fisheries Res, N Sea Ctr, DK-9850 Hirtshals, Denmark.
2 : IFREMER, Ctr Brest, F-29280 Plouzane, France.
Source Fisheries Research (0165-7836) (Elsevier), 2006-09 , Vol. 80 , N. 2-3 , P. 148-157
DOI 10.1016/j.fishres.2006.04.018
WOS© Times Cited 19
Keyword(s) Catch weight, FEMNET, PRESEMO, Round straps, Cod end selectivity
Abstract FEMNET, a numerical tool based on the finite element method, was applied to estimate the shapes of various diamond-mesh cod-end designs during fishing. The only design differences rest in the use of round straps of different lengths, positions and numbers. The cod-end shape estimates were then entered in the selectivity simulation tool PRESEMO to simulate the selectivity processes of the various cod-end designs under the same varying fishing conditions. This enabled us to demonstrate how one or two round straps along the cod-end axis may change the selectivity of the cod-end compared with a reference cod-end, without round straps. We predict that in cod-end designs, which comply with the EU legislation, the 50% retention length (L50) may be reduced by up to 1.5 cm (5%) for haddock. (c) 2006 Elsevier B.V. All rights reserved.
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