Response of Four Local Freshwater Fish Species to The Toxicity of Thiocarbamate Insecticide Cartap (Suntap 50 SP)

Md. Nazmul Haque, Md. Jahidul Islam, Bikash Chandra Sarker, Subrota Kumer Pramanik, Mst. Nasrin Zahan and Tanjiba Mahajebin

International Journal of Science and Business, 2018, vol. 2, issue 3, 432-442

Abstract: An investigation was conducted at Agricultural Chemistry Laboratory, Hajee Mohammad Danesh Science and Technology University, Dinajpur during November 2016 to April 2017 to study the response of four local freshwater fish species (Stinging catfish, Spotted snakehead, Climbing perch and Tangra) to the toxicity of a neurotoxic insecticide thiocarbamate Cartap (Suntap 50 SP). Results indicated that the limit of probit was increased with the increment of Cartap concentration and time of exposure for all the fish species. The lethal concentration (LC50) of Cartap was 2.94 ppm in Stinging catfish, 2.26 ppm in Spotted snakehead, 3.48 ppm in Climbing perch and 2.69 ppm in Tangra, respectively with the 95% confidence limit. The results reveal that the Cartap was more toxic to Spotted snakehead and less toxic to climbing perch as compared to the other two species. Water quality parameter such as pH, temperature, electrical conductivity and total dissolved solid of the experimental aquatic conditions were increased but the dissolved oxygen of that was reduced with the increment of Cartap concentration and exposure of time which also affected the fish behaviors negatively. Therefore, in field condition, if water level is 3 cm then the total amount of water 312500 litres is needed for 1 hector of land approximately and 800 ppm insecticide is dissolved in this field. Although its concentration is lower than exact dose it will be seriously hamper the aquatic organism.

Keywords: Neurotoxic; Cartap; Toxicity; LC50; Water quality (search for similar items in EconPapers)
Date: 2018
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