eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-01-29 3 2 393 394 5309 article Alok Varma 1 Sanjay Telang 1 Geeta Saxena 1 Chandana Basu 1 Seema Dixit 1 Department of Zoology, Goverment Science and Commerce College, Benazir, Bhopal - 462 001 (India) Pesticides influence various physiological and biochemical parameters of fishes (Mckim et al. 1970, Rajik et al. 1983). In the present study, certain observations on blood – haemoglobin percentage(Hb %) , total erythrocyte count (TEC) and total leucocyte count (TLC) have been made. These parameters were observed in normal as well as dichlorovos (organophosphate pesticide) are treated Heteropneustes fossilis. It was noted that by increasing the dose of dichlorovos, significant fall in TEC and Hb % values, while the values of TLC increased gradually compared with control. https://www.biotech-asia.org/vol3no2/haematological-study-of-dichlorovos-induced-heteropneustes-fossilis/ Haematological study; TEC; TLC; Hb % ; Heteropneustes fossils