Registro completo |
Provedor de dados: |
ArchiMer
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País: |
France
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Título: |
Simulation-based study of the combined effect on cod-end size selection of turning meshes by 90 degrees and reducing the number of meshes in the circumference for round fish
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Autores: |
Herrmann, Bent
Priour, Daniel
Krag, Ludvig A.
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Data: |
2007-04
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Ano: |
2007
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Palavras-chave: |
FEMNET
PRESEMO
T90
Cod end selectivity
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Resumo: |
FEMNET, a numerical tool based on the finite element method, was used to estimate the shapes of four different designs of trawl cod-ends during fishing operations. Compared to a traditional diamond-mesh cod-end the design differences were the following: (i) the netting orientation was turned by 90 degrees (T90), (ii) the number of meshes in the circumference was reduced by 50% or (i) and (ii) were combined. The cod-end shape estimates were then entered into the simulation tool PRESEMO, to estimate their influence on the selectivity processes in the cod-end. This enabled us to predict how these design alterations - alone or combined - may act on the selectivity of each cod-end under identical fishing conditions. For instance, we predict that for a I 10 mm diamond-mesh cod-end the 50% retention length (1-50) is increased by nearly 12 cm by both turning the mesh orientation and reducing the number of meshes in the circumference. Of this combined effect we predict that 24% of it is caused by only turning the mesh orientation whereas 71 % of the effect stems from only reducing the number of meshes in circumference. The remaining 5% is due to the interaction between the two factors. (c) 2006 Elsevier B.V. All rights reserved.
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Tipo: |
Text
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Idioma: |
Inglês
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Identificador: |
http://archimer.ifremer.fr/doc/2007/publication-2588.pdf
DOI:10.1016/j.fishres.2006.10.020
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Editor: |
Elsevier
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Relação: |
http://archimer.ifremer.fr/doc/00000/2588/
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Formato: |
application/pdf
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Fonte: |
Fisheries Research (0165-7836) (Elsevier), 2007-04 , Vol. 84 , N. 2 , P. 222-232
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Direitos: |
2006 Elsevier B.V. All rights reserved
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