Theoretical study of the effect of round straps on the selectivity in a diamond mesh cod-end
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.
Keyword(s)
Catch weight, FEMNET, PRESEMO, Round straps, Cod end selectivity
Herrmann B, Priour Daniel, Krag L (2006). Theoretical study of the effect of round straps on the selectivity in a diamond mesh cod-end. Fisheries Research. 80 (2-3). 148-157. https://doi.org/10.1016/j.fishres.2006.04.018, https://archimer.ifremer.fr/doc/00000/1870/