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Growth of the blue mackerel Scomber scombrus in Tunisia using the otolith microstructure

Published online by Cambridge University Press:  28 May 2012

Chédia Jabeur ,
Kacem Mahmoudi ,
Widien Khoufi  and
Eric Morize
Chédia Jabeur*
Affiliation:
Faculté de Pharmacie, Laboratoire d'Analyse, Traitement et Valorisation des Polluants de l'Environnement et des produits, Rue Avicenne, 5019 Monastir, Tunisie
Kacem Mahmoudi
Affiliation:
High Institute of Biotechnology of Monastir
Widien Khoufi
Affiliation:
National Institute of Marine Sciences and Technologies
Eric Morize
Affiliation:
IRD/LEMAR, Institute for Research and Development, Brest, France
*
Correspondence should be addressed to: C. Jabeur, Faculté de Pharmacie, Laboratoire d'Analyse, Traitement et Valorisation des Polluants de l'Environnement et des produits, Rue Avicenne, 5019 Monastir, Tunisie email: [email protected]
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Abstract

This paper studies the age and the growth of male and female of the Tunisian blue mackerel Scomber scombrus during 2004–2006. The age was determined by interpreting and counting daily increments on the otoliths sagitta of 320 individuals sampled from landings caught by different gears specially by purse seine. The parameters of the Von Bertalanffy growth curve were estimated for sexes combined: Lf = 31.46(1 − e−0.228 (t+3.034)) (L∞ = 31.46 cm, k = 0.228 per year, t0 = −3.034 years); for male Lf = 27.43(1 − e−0.422 (t+1.747)) (L∞ = 27.43 cm, k = 0.422 per year, t0 = −1.747 years) and for female Lf = 31.70(1 − e−0.227 (t+2.196)) (L∞ = 31.70 cm, k = 0.227 per year, t0 = −2.916 years) for the whole study period. The difference between the growth of male and female is not significant. The relationship between length and weight shows a length growth faster than of the weight with parameters of the equation Wt = a*Lb; a = 9.89*10−5 and b = 2.37 for the sexes combined.

Keywords

agegrowthmackerelTunisiaScomber scombrusmicrostructure
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Special Issue 2: Fish and Fisheries , March 2013 , pp. 351 - 355
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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