Etude de quelques paramètres de la biométrie, de la croissance et de l’histologie d’un Thonidé mineur ; la thonine : Euthynnus alletteratus (Rafinesque, 1810), pêché dans la baie de Mostaganem.

Abstract

This initial workhelped to bringelements of information on someparameters of biometrics, growth and exploitation of d’Euthynnus alletterratuscaputured in the Bay of Mostaganem. The studyisbased on a set of 53 individuals with a total weight of Kg, 39 females and 14 males ; Sampled in the Bay of Mostaganem during 4 months, betweenoctober2017and january 2018. The sex ratio shows the dominance of females73, 58. The vertebralaverageis . The calculatedrelationshipsreveal a minimal allometrybetween total length and forklength and alsobetweenheighandweight.Thismeansthat the total lengthgrowsslowerthan the forklength and that the total weight (Wt) growslessquicklythan the size(Lt). The growthparameters of Von Bertalanffyweredetermined by studying size structures and using FISAT II software (version 1.2.0), a software recommended by FAO. The asymptoticlength (L∞) of the d’Euthynnus alletterratusis cm ; the growth coefficient (K),whichdetermines the fish’s speed to approach the asymptoticlength , is high, itis The histologicalstudyallowed us to study the microscopicanatomy of the targetorgans (the liver, the gonadsthe heartRedmeat and white meat)