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Primeros datos sobre la dinámica del «stock» de merluza europea (Merluccius merluccius L.) frente al litoral gallego

Authors: Robles, R. (Rafael); Iglesias-Martínez, S. (Sergio); Pereiro-Muñoz, F.J. (Francisco Javier); Pereiro-Muñoz, J.A. (José Antonio);

Primeros datos sobre la dinámica del «stock» de merluza europea (Merluccius merluccius L.) frente al litoral gallego

Abstract

Durante la campaña «Merluza NW 74", realizada en aguas gallegas, se extrajeron los otolitos de 272 merluzas, que hicieron posible conseguir una primera aproximación a la clave talla-edad, y al relacionarlos con las capturas de merluza obtenidas durante la campaña, una estimación de la mortalidad total. Los resultados muestran que el parámetro K de la ecuación de V. Bertalanffy estaría comprendido entre 0,069 y 0,O83, Y L∞ entre 143 y 124 cm. La mortalidad de las clases 1+ a II+ sería 0,94, y de la clase III+ en adelante, de 0,6. La alta cifra de mortalidad entre las clases II+ y JII+, y el sesgo a la izquierda de la talla media de la clase II+, demostrarían una emigración hacia fuera de la costa de la merluza mayor de esta clase de edad y de clases posteriores.

During "Merluza NW 74" survey, undertaken off Galicia shores in August 1974, otoliths of 272 hakes were collected, that made possible to obtain a first approach to the length-age key ; and, relating these data with hake catches during the survey, a first estímate of total mortality was obtained. Results show that the K value from V. Bertalanffy equation would be between 0,069 and 0,083, and L∞ between 143 and 124 cm. Total rnortality between age classes I+ and II+ would be 0,94, and for classes III+ and older, 0,6. The high mortality figure between I+ and III+ classes, and the skewness to the left in the mean length of this class, woulcl show an emigration offshore for the bigger hake of this age-class and older.

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Spain
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Centro Oceanográfico de Vigo, Pesquerías

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selected citations
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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.
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influence
This indicator 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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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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