BIO MARKERS RESPONSE IN THE SNAIL CORNU ASPERSUM (GASTROPODA, HELICIDAE) USED AS BIO INDICATOR OF SOIL POLLUTION IN EXTREME NORTHEAST OF ALGERIAYousra Bairi, Karima Sifi* and Samira Kilani-Morakchi
Our study aims to use the snail Cornu aspersum as bio indicator species to bio monitoring soil quality in northeast of Algeria through measurement of the seasonal activities of three bio markers, glutathione Stransferase, acetylcholinesterase and metallothioneins. C. as per sum were collected seasonally during the year 2016, at four sites located in the extreme northeast of Algeria. El Hadjar, site exposed to industrial wastes; the sites of El Tarf and Bouteldja subjected to urban and agricultural pollution; and El Kala, located in a protected park, chosen as a witness site. An inhibition of acetylcholinesterase and an increase of both glutathione S-transferase and metallothioneins were observed in samples collected from El Hadjar, El Tarf and Bouteldja as compared to El Kala. In addition, a significant seasonal effect was observed in spring and summer as compared to autumn and winter. This work reveal that C. as per sum can be used as a suitable bio indicator species for bio monitoring soil quality in northeast of Algeria who was related to sources of exposition to pollution.