Scientia Marina, Vol 66, No 1 (2002)

Determination of age and growth of the striped seabream Lithognathus mormyrus (Sparidae), in the Canary archipelago by otolith readings and backcalculation


https://doi.org/10.3989/scimar.2002.66n127

José G. Pajuelo
Departamento de Biología, Universidad de Las Palmas de Gran Canaria, Spain

José M. Lorenzo
Departamento de Biología, Universidad de Las Palmas de Gran Canaria, Spain

María Méndez
Departamento de Biología, Universidad de Las Palmas de Gran Canaria, Spain

Josep Coca
Departamento de Biología, Universidad de Las Palmas de Gran Canaria, Spain

Antonio G. Ramos
Departamento de Biología, Universidad de Las Palmas de Gran Canaria, Spain

Abstract


The age and growth of the striped seabream Lithognathus mormyrus caught off the Canary Islands (central-east Atlantic) from January to December 1999 were studied. A total of 496 individuals, ranging in size between 113 and 350 mm total length, were examined. Otoliths clearly showed the ring pattern common to teleost fishes. One year´s growth was made up of one opaque and one translucent ring. The opaque ring was deposited during the summer months and the translucent one during the winter months. Fish aged 0-8 years old were found. The von Bertalanffy growth parameters for all fish were: L?=427 mm, k=0.19 year-1, and t0=1.46 year. The otolith readings for estimating age and growth were confirmed by using the backcalculation method.

Keywords


Lithognathus mormyrus; age; growth; otolith readings; backcalculation; Canary Islands

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