Abstract
Sphyraena chrysotaenia is currently an important component of the eastern Mediterranean inshore fisheries. In Tunisia it was recorded for the first time in the Gulf of Gabes in 2002 where it is now an important fished species. This study estimates age and calculates growth of this species from the coast of Gulf of Gabes (southeast of Tunisia) based on otolith analysis. Annual periodicity of alternating zones was confirmed, in which one translucent and one opaque zone were observed to deposit each year. These results allowed us the estimation of the approximate age to the appearance of each “stop growth increment.” The age estimated was 5 years old for both sexes. The means of back calculations of total length-at-age were satisfactorily used to von Bertalanffy growth model L t = 283.2 (1 − e−0.3199(t+ 1.716) ). Differences in the growth rhythms were observed between the sexes. The asymptotic lengths were 285.1 and 258.8 mm, respectively, for females and males. The length-weight relationship for both sexes of S. chrysotaenia is Wt = 0.0048 LT 3.0696 .
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