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Comparative growth in relation with the age assessed by skeletochronology in two mullet fishes of genus Liza

Published online by Cambridge University Press:  02 September 2010

D. Patón
Affiliation:
Unidad de Producción Animal, Departamento de Zootecnia, Facultad de Veterinaria, Universidad de Extremadura, 10080 Cáceres, Spain
L. Cardona
Affiliation:
Divisió de Cièncias Experimentals i Matemàtiques, Departament de Biologia Animal, Universitat de Barcelona, 08028 Barcelona, Spain
E. Gisbert
Affiliation:
Divisió de Cièncias Experimentals i Matemàtiques, Departament de Biologia Animal, Universitat de Barcelona, 08028 Barcelona, Spain
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Abstract

We propose a new method for determining age in mullet fishes taking the thoracic spines as material of analysis. The relations length-age and tueight-age were evaluated by von Bertalanffy and logarithmic regressions. Both methods closely agreed with the observed data but the von Bertalanffy's model showed the best R2 values in both species. Two parameters related to growth speed; the K coefficient of von Bertalanffy's model and the slope of logarithmic regression, were higher in Liza ramada than in Liza saliens. However, our results show that mullet have both high rates of size-growth and weight-production, in comparison with other marine fishes.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1994

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