ASSESSMENT OF ACUTE TOXICITY AND HISTOPATHOLOGY OF THE ENDOSULFAN IN ERIOCHEIR HEPUENSIS DAI, 1991 (CRUSTACEA: BRACHYURA: GRAPSOIDEA: VARUNIDAE)AMAAL GH. YASSERA, NADA M. AL- BAGHDADIA AND MURTADA D. NASERAAbstract Endosulfan is widely used in agricultural activities and overfishing in the south of Iraq, impacting negatively on the ecology and species that live in the regionâs waters. The acute toxicity of endosulfan, an organochlorine insecticide, to the edible crab Eriocheir hepuensis (Dai) was investigated in this work. 96h LC50 value of endosulfan on crab was 55.15 μg/l. With increasing toxicant concentration and exposure time, the exposed crab displayed restlessness, escape behavior, increased scaphognathite activity. The sublethal exposure studies were done for up one week and two weeks at 1/8 of LC50 96 h for histopathological analysis. The most histopathological alterations were hyperplasia (HY), lamellar collapse (CL), and after two weeks exposure was rupture of pilaster cells (RCP). |