Kaushal Kumar & Arun Kumar*
University Department of Zoology, B.N.M.University, Madhepura, Bihar, India
Received : 22nd April, 2020 ; Revised : 19th May, 2020
Abstract– To study the effect of an organothiophosphate insecticide phenthoate on different haematological parameters in the striped dwarf catfish Mystus vittatus, an attempt has been made in the present work. A decrease in RBC count, Hb content and PCV as compared to control was seen on treatment of sub-lethal concentration of phenthoate (96 hrs). In lower concentration of phenthoate the TLC showed rising trend in comparison to control but in higher concentration presented an opposite trend i.e. decline in TLC. However Lymphocyte and Monocyte showed significant increase in their percentage. Dose dependent effects were seen. The reasons for such changes have been discussed in detail.