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Variation de l’accumulation du lindane chez les alevins de Liza ramada.

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Author
Masmoudi, W.
Romdhane, M.S.
Kheriji, S.
El Cafsi, M.
Date
2001

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Alternative Title
تقييم كميات مبيد اللندان المركزة في جسم صغار سمك البوري
Variation of the accumulation of the lindane with Liza ramada fry.
Abstract
Pendant la saison printanière de recrutement maximale (avril/mai2000) des alevins de Liza ramada , nous avons effectué 4 campagnes de pêche au niveau de l’embouchure de canal « Khélij ». Les alevins de cette espèce ainsi collectés ont été repartis en trois classes de taille (classe I :19,4  1,3 mm ; classe II : 45,5  5,3 mm et classe III : 63,2  6,3mm) dans le but d’y analyser les résidus du lindane (  HCH ), un pesticide organochloré. Nos résultats ont révélé des concentrations de ce résidu chutant de 57,42  12,49 à 12,67  3,27 ng/ g de graisse en passant de la classe I à la classe III. Cette diminution est probablement due à une amélioration avec l’âge des capacités métaboliques de l’espèce vis à vis du contaminant. D’un autre côté, Liza ramada semble épuiser ses réserves lipidiques pour acquérir l’énergie nécessaire à sa croissance.
:لقد تم اصطياد صغار سمك البوري( بيتوم , Liza ramada) خلال فترة تواجد بوادي الخليج بمنطقة رواد. و تناولت دراستنا تحليل و تقييم كميات مبيد اللندان المركزة في جسم الأسماك وذلك حسب مختلف الأحجام. تبين لنا من خلال النتائج أن كميات اللندان تنخفض تدريجيا من 57,42 إلى 12,67 نغ/غ من المادة الدهنية مع زيادة طول السمك. هذا الانخفاض يمكن تفسيره بتحسن قدرة هذا النوع من السمك على التخلص من المادة الملوثة مع نسبة النمو.ومن ناحية أخرى نفترض حسب نتائجنا أن صغار هذه الأسماك تستهلك مدخراتها الدهنية قصد التزود بالطاقة الأساسية للنمو.
During the recruitment season, Liza ramada fry were captured from “Khélij” Wadi outlet. The samples divided into three different size groups (class I :19,4  1,3 mm ; class II : 45,5  5,3 mm and class III : 63,2  6,3mm) were analysed for organochlorines pesticides residues. Results point out a significant reduction of lindane ( HCH) residues levels : Their concentration pass from 57,42 to 12,67 ng/g fat weight with the increase of the fry size. This reduction is probably due to an improvement with the age of the metabolic capacities of species towards the contaminant. Of another side Liza ramada seems to impoverish its fat reserves to acquire energy necessary to its growth.
Journal
Bulletin de l Institut national des sciences et technologies de la Mer
Volume
28
Publisher or University
INSTM
URI
http://hdl.handle.net/1834/3706
Collections
Articles - Bulletin de l'INSTM

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