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DIGITAL.CSIC
Article . 2023 . Peer-reviewed
Data sources: DIGITAL.CSIC
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Influencia de la geometría de la malla del copo de arrastre en las capturas, selectividad y rendimientos de algunas especies de peces comerciales en el Golfo de Alicante (S.E. España)

Authors: García-Rodríguez, M. (Mariano); Fernández, A.M.;

Influencia de la geometría de la malla del copo de arrastre en las capturas, selectividad y rendimientos de algunas especies de peces comerciales en el Golfo de Alicante (S.E. España)

Abstract

Se analiza el comportamiento de los artes provistos con copos de 40 mm de malla rómbica y cuadrada, y su influencia en cuatro especies demersales de importancia comercial: merluza, bacaladilla, salmonete de fango y salmonete de roca. Las capturas totales obtenidas (copo más sobrecopo) fueron similares con ambos tipos de malla, aunque la tasa de retención en el copo fue un 20% mayor en el caso de la malla rómbica; por el contrario la tasa de descarte fue un 30% menor con la malla cuadrada. Las tallas de primera captura obtenidas con los copos de malla cuadrada son mayores que las obtenidas con los de malla rómbica para las cuatro especies analizadas, obteniéndose asimismo un rango de selección (25-75%) y un factor de selección mayores. Los rendimientos no muestran diferencias significativas entre ambos tipos de malla en ninguna de las especies consideradas. En todos los casos las tasas de descarte para estas especies fueron muy bajas. El uso de la malla cuadrada de 40 mm produciría efectos positivos en la pesquería debido al incremento de las tallas de primera captura y en el ecosistema debido a la reducción de los descartes de especies no comerciales.

Yield, selectivity parameters an discard rates for diamond and square shaped 40 mm cod-end mesh size are analysed for some important commercial fishes (european hake, striped red mullet, red mullet and blue whiting). Although total catches were similar with both types of mesh, retained catch was 20% higher for the diamond mesh whereas discard rates were lower with the square mesh. Size at the first capture obtained with the square mesh is higher and selection range (25-75%) and selection factor higher with respect to those obtained for the diamond mesh. Discard rates for the species considered are negligible in both cases. The use of the 40 mm square shaped cod-end mesh could produce benefits to the fishery due to the increase of the size at the first capture for the species considered, and to the ecosystem because the reduction of discards rates of non commercial species.

Artículo de investigación. Consta de Abstract, Introducción, Material y Métodos, Resultados y Discusión. 27 pp.

Peer reviewed

Country
Spain
Keywords

Sede Central IEO, Pesquerías

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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