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Research Journal of Environmental Sciences

Year: 2011 | Volume: 5 | Issue: 11 | Page No.: 827-835
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Authors

Mahdi Banaee

Kamal Ahmadi

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Research Article

Sub-lethal Toxicity Impacts of Endosulfan on Some Biochemical Parameters of the Freshwater Crayfish (Astacus leptodactylus)

Mahdi Banaee and Kamal Ahmadi
Endosulfan, an organochlorine pesticide in surface waters of Iran near agriculture farms such as Anzli Lagoon has been reported by some authors. The present research aimed to evaluate the effect of sub-lethal concentrations of endosulfan on some biochemical parameters. After determining 96 h LC50 of endosulfan, eighty one freshwater crayfish, Astacus leptodactylus were subdivided into three groups and were exposed to 0.0, 32.5 and 65 μg L-1 of endosulfan. Biochemical parameters such as protein, succinate dehydrogenase (SDH), lactate dehydrogenase (LDH), acid phosphatase (AcP) and alkaline phosphatase (ALP) activities in muscle tissue of crayfish after 15 and 30 days. The significant decrease in protein levels was observed in treated crayfish when compared with the control group (p<0.05). The SDH activity showed a significant decreased (p<0.05) in the crayfish exposed to 65 μg L-1 and both concentrations of endosulfan on 15 and 30 days, respectively. A significant increase (p<0.05) was observed in LDH activity of crayfish exposed to 32.5 and 65 μg L-1 of endosulfan after 15 and 30 days, respectively. After 30 days, a significant increase in the levels of ALP and AcP activities was observed in the treated crayfish by 65 μg L-1 of endosulfan (p<0.05). In conclusion, exposure to endosulfan at sub-lethal concentrations induced biochemical alterations in crayfish. These biochemical parameters offer a rapid and sensitive means of monitoring towards the impact of pesticides on aquatic biota and ultimately whole of the ecosystem.
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