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Estimación de la edad y el crecimiento de la merluza austral Merluccius australis (Hutton, 1872) del Mar Argentino

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Rev Invest Desarr Pesq 20 65-73.pdf
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Author
Gorini, F.L.
Abachian, V.E.
Giussi, A.R.
Date
2010

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Alternative Title
Age and growth of southern hake Merluccius australis (Hutton, 1872) of the Argentine Sea
Abstract
Southern hake (Merluccius australis) age and growth were estimated using sagittae otoliths obtained in research cruises and observers programs in the Argentine Sea (SW Atlantic). The only annual growth ring observed, formed by two bands, one hyaline and another opaque, corresponded to winter and summer growth, respectively. According to the analysis of otoliths edge, birthday was established on 1st July. Within the age range observed, that comprised 3-18 year old specimens, age groups 7, 8 and 9 were the most frequently identified in both sexes. Growth parameters estimates showed significant differences between them.
Se presenta un análisis del crecimiento y una estimación de la edad de la merluza austral (Merluccius australis) del Mar Argentino (Atlántico SO) realizados utilizando otolitos sagittae provenientes de campañas de investigación y del muestreo realizado por observadores. El único anillo de crecimiento anual que se observó, formado por dos bandas, una hialina y otra opaca, correspondió al crecimiento de invierno y verano, respectivamente. De acuerdo con el análisis de borde, la fecha de cumpleaños se fijó el 1º de julio. Dentro del rango de edad observado, que abarcó especímenes de entre 3 y 18 años, las edades 7, 8 y 9 fueron las que se identificaron con mayor frecuencia en ambos sexos. La estimación de los parámetros de crecimiento permitió observar diferencias significativas entre ellos.
Journal
Revista de Investigación y Desarrollo Pesquero
Volume
20
URI
; http://hdl.handle.net/1834/4223
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Revista de Investigación y Desarrollo Pesquero

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