Abstract

In this study it was considered in a preliminary way the age and the growth of the yellowtail (Ocyurus chrysurus, Bloch 1791) in the Island of Holbox, Quintana Roo during the period March-May of the 2002. The yellowtail is a characteristic tropical fish of the reef areas, belonging to the family Lutjanidae, this species is found distributed from Florida to Brazil being more abundant in the Gulf of Mexico. A total of 871 organism captured by the handmade fleet of community of Holbox were obtained, using the hook and line like fishing art. For the estimate of the age and the populational parameters they used the lenght frequencies of the three worked months. It was observed that the biggest capture incidence is among the sizes 255 and 275 mm FL, with a stocking of 265 mm FL. The populational parameters obtained through the software FiSAT were for ELEFAN Loo= 500.50, k= 0.33 and to= -0.19 and by means of Shepherd's Loo= 520.05, k= 0.30 and to= -0.22. The intervals of lenght frequency were also used to determine the relationship between lenght and weight with an= 659 organisms; the result of the regression was W= 0.00004334FL2.8105. The curve of growth was carried out for the von Bertalanffy equation where Lt= 500.5 (1-e-0.33(t+0.19)) for ELEFAN and Lt= 520.05 (1-e-0.30(t+0.22)) for Shepherd's. The knowledge of the populational parameters is of supreme importance to guarantee an appropiate handling of this resource, as well as its conservation for the future generations.

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