Comparación de la malla de rombo y cuadrada en la pesquería de arrastre de la merluza (<i>Merluccius merluccius</i> L. 1758) en el mar Adriático (Mediterráneo central)
2008; Spanish National Research Council; Volume: 72; Issue: 3 Linguagem: Inglês
10.3989/scimar.2008.72n3451
ISSN1886-8134
Autores Tópico(s)Coral and Marine Ecosystems Studies
ResumoA traditional codend (40 mm diamond mesh) and an experimental codend (40 mm square mesh) made of 2.6 mm diameter knotless PA netting were tested on a commercial trawl net on a sandy-muddy bottom (~70 m depth) of the Adriatic sea in order to assess the size selectivity of European hake (Merluccius merluccius) and the reduction of the discards in a demersal multi-species trawl fishery.The catch was sorted as target species and bycatch and the selectivity with respect to European hake was investigated using the covered codend method.The square-mesh codend allowed a reduction of about 37% of the fraction discarded at sea.The mean catch obtained with the experimental codend was lower than that obtained with the traditional codend (about 14 kg per haul) but the short-term economic losses were low (~12%).The square-mesh codend was also more selective than the traditional codend, giving the juveniles of European hake a good chance of escape: the mean selection length (L 50 ) was 7.60 cm in DM and 12.98 cm in SM.Moreover, the mesh configuration did not affect the gear's performance.Thus, the square-mesh codend could be an easy, inexpensive and useful solution for a more sustainable management of the resources in Adriatic multi-species fishery.
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