Data/hora: 16/06/2024 04:24:45

Provedor de dados: | 5
País: | France
Título: | SURVEYTRAWL. A strategy for the design, development and implementation of a new standard demersal survey trawl
Autores: | Vincent, Benoit; Huse, Ingvar; Huse, Irene; Maravelias, Christos.
Data: | 2004
Ano: | 2004
Resumo: | The trawls used to sample demersal fish are normally slightly modified commercial fish or shrimp trawls. Such trawls are designed to capture commercial species, and do not lend themselves well to representative sampling, mainly due to the herding effect of trawl doors, sweeps and bridles. The impact of herding is different on different species and size groups of the same species, and both inter- and intra-specific effects can be quite large. The SURVEYTRAWL project intends to provide the strategic basis and initial design for a new survey trawl, which will represent a good compromise in terms of being non-herding and non-selective, and with stable and consistent operation. The final objective is to produce a new trawl with the characteristics of a beam trawl (no herding effect, stability), but with no beam. To avoid the herding effect, different rigging concepts are studied. The netting part of the different trawls are very similar for each concept, but the riggings is very different. The designs have been tested by means of numerical simulation, using Dynamit (commercial software), to verify whether the designs represent hydrodynamically viable options. Particular attention is paid to:  - The gear simplicity.  - The net openings and geometry variations versus the towing speed and depth.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00629/74117/73557.pdf

DOI:10.13155/74117

https://archimer.ifremer.fr/doc/00629/74117/

Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

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