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L'anchois ( engraulis encrasicolus) des cotes nord de la Tunisie : reproduction et exploitation

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Author
Gaamour, A.
Khemiri, S.
Mili, S.
Ben Abdallah, L.
Date
2004

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Alternative Title
Anchovy (engraulis encrasicolus) in the north coast of Tunisia
الأنشوة بالسواحل الشمالية لتونس: التكاثر والإستغلال
Abstract
The reproduction parameters necessary for stock management and catch analysis of anchovy in the North region of Tunisia were studied. The global sex-ratio is close to 1, special caution should be taken using this parameter as it is size dependant. Mean reproduction period extends from April to October. However within this period individuals of population have different spawning and maturation. The size at first sexual maturity Lm50 is about 7.3cm. In the North region of Tunisia, the anchovy landings are lower than the exploitable biomass, therefore the anchovy is an under-exploitable species in this region
Le present travail porte sur l'etude, chez l'anchois Engraulis encrasicolus de la region Nord de la Tunisie, des parametres de reproduction necessaires a la gestion des stocks ainsi qu'a l'analyse des debarquements. Le sex-ratio global est voisin de 1, cette valeur est a prendre avec precaution car ce parametre varie en fonction de la taille des individus. L'anchois se reproduit en moyenne d'avril a octobre, les individus de la population sont decales dans leur maturation et emissions. La taille de premiere maturite sexuelle Lm50 est de 7,3cm. Les debarquements d'anchois dans la region Nord de la Tunisie sont inferieurs a la biomasse exploitable. L'anchois est donc une espece sous exploitee dans la region Nord de la Tunisie.
يهتم هذا العمل بدراسة معطيات التكاثر، الضرورية لحسن التصرّف في لسمك الأنشوة بالسواحل التونسية بالنسبة لجملة العينات يتساوى عدد الإناث والذكور مع العلم أنّ نسبة كل جنس تتغير حسب طول السمكة. يتكاثر سمك الأنشوة خلال الفترة الممتدة من أفريل إلى أكتوبر مع وجود إختلال بين الأفراد. يبلغ سمك الأنشوة نضجه الجنسي الأول لطول يناهز 7.3 صم. يفوق المخزون المتاح إستغلاله من سمك الأنشوة الكميات المنزلة بمواني الصيد البحري. تبعا لذلك فإنّ سمك الأنشوة بالشمال التونسي دون الإستغلال الأمثل.المخزون، وبتحليل إنتاج الصيد البحري
Journal
Bulletin de l'Institut National des Sciences et technologies de la Mer (INSTM)
Volume
31
Publisher or University
INSTM
URI
http://hdl.handle.net/1834/4236
Collections
Articles - Bulletin
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