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Relación entre las edades y la profundidad, e índices y áreas de reclutamiento de la merluza, en Galicia y aguas adyacentes

Authors: Pereiro-Muñoz, F.J. (Francisco Javier); Fernández, Á. (Álvaro);

Relación entre las edades y la profundidad, e índices y áreas de reclutamiento de la merluza, en Galicia y aguas adyacentes

Abstract

En el presente trabajo se estudian las relaciones entre las profundidades y las edades, así como los niveles de reclutamiento de la merluza capturada durante diez campañas, realizadas entre 1974 Y 1981 en las divisiones VIII e y IX a del ICES. Se observa una clara estratificación batimétrica de las edades y una tendencia significativa a aumentar la edad media con la profundidad (r = 0.80). Por otro lado se pone de manifiesto una grave caida del reclutamiento en los años siguientes sobre el nivel detectado en 1974, si bien el de 190 fue superior al de los cuatro años anteriores. Las zonas de más fuerte reclutamiento ("nurseries") localizadas desde la fosa de Cap Breton hasta el estrecho de Gibraltar (stock sur de merluza europea) son las situadas en la plataforma continental de Galicia, entre 100 y 200 metros de profundidad, entre N con Cabo prior y N con Cabo Villano, y entre W con Cabo Corrubedo y W con Cabo Silleiro.

In this paper we have studied the relationship between depth and age of hake. We have used data from ten research surveys, carried out between 1974 and 1981 in the divisions VIII-c and IX-a of ICES. A clear stratification of ages was observed. lt exists a significant tendency to in crease the mean age with depth (r = 0.80). On the other hand, the recruitment level detected in 1974 seriously decreased in the following 5 years, although in 1980 a slightly better recruitment was recorded. The hake nursery of the Galician continental shelf (100- 200 m deep) is the most important nursery area known from Cap Breton to Gibraltar strait (southern stock of european hake).

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Spain
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Centro Oceanográfico de Vigo, Pesquerías

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selected citations
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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).
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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.
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