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Les escargots terrestres du genre Helix Linnaeus (1758), consideres comme bioindicateurs de pollution terrestre, sont souvent utilises pour verifier la toxicite des metaux lourds. A cet egard, 2 lots d’echantillons aleatoires d’escargots Helix aspersa ont ete collectes au niveau de 2 sites dans la region Sud d’Annaba durant l’automne 2009. La premiere Sidi Amar est consideree comme hautement polluee en raison de sa proximite du complexe siderurgique d’El Hadjar. La seconde Drean , une commune agricole, principalement connue pour son tabac, ses oranges et ses vignes et situee a 20 Km de la premiere, est moins polluee. Les variables morphometriques : Diametres et Hauteurs de la coquille, Poids Total de l’escargot, Poids de la coquille vide et Poids de la masse viscerale ont ete mesures sur l’ensemble des echantillons. Les donnees recueillies montrent des differences remarquables pour tous ces parametres avec une croissance plus accentuee au niveau de Drean . L’echantillon de Drean cumule un poids moyen de 10.87 g tandis que celui de Sidi Amar n’en cumule que 7.7 g. De plus, l’application du Test t de Student montre des differences hautement significatives entre les variables morphometriques des individus provenant des 2 sites Sidi Amar et Drean (p< 0.001). La proximite du site Sidi Amar d’une source de pollution siderurgique est un facteur limitant la croissance d’ Helix aspersa . Mots cles: Helix aspersa - Bio indicateur - Biometrie - Croissance - Glutathion - Pollution - Annaba. Land snails Helix Linnaeus (1758), known as bioindicators of soil pollution, are often used to verify toxicity of heavy metals. In this regard, two random samples of 100 Helix aspersa each were collected from two sampling sites in the Southern area of Annaba during autumn 2009. The first one Sidi Amar is regarded as a highly polluted area by El Hadjar steel factory. The second sampling area called Drean , 20 km far from the first one, is considered as a slightly polluted area. Morphometric parameters; Diameter and Height of Shell as well as Total Body Weight, Shell and Visceral mass were measured from all sampled snails. The sample of Drean accumulates an average weight of 10.87 g while that of Sidi Amar accumulates 7.7 g. Data revealed remarkable differences between these parameters with a more accentuated growth in Drean station. Indeed, applied t Student test on morphometric parameters showed highly significant differences between the two stations Sidi Amar and Drean (p< 0.001). The proximity of steel pollution industry is a factor limiting the growth of Helix aspersa in the area of Sidi Amar . Keywords: Helix aspersa - Bio indicator – Biometry – Growth – Glutathione - Pollution - Annaba.

synthèse

Biométrie et Dosage du Glutathion Chez Helix Aspersa Müller ( Gastropoda ; Helicidae ) en Zones Agricole et Urbaine Polluée dans la Region d’El-Hadjar ( Annaba , Algérie )