University Department of Zoology, B.N.M. University, Madhepura, Bihar, India
Received : 05th January, 2023 ; Revised : 05th February, 2023
Abstract– In the agricultural area (Paddy), it has been discovered that many pests have developed resistance to the usual pesticides, such as deltamethrin (a pyrethroid), which are typically used to treat the crops to make them insect-free. However, the pond also serves as an excellent refuge for fish that live at the bottom of the water column, Heteropneustes fossilis (Bloch), which are frequently subjected to chemicals used to eradicate insects. After 30 and 40 days of exposure, there was a dramatic peak in opercular beat as well as a gradual increasing trend of 20 to 30%, all of which contributed to a significant mortality rate. Using accepted techniques, the current experiment was conducted to determine how deltamethrin affected the hematopoietic variables in the Asian stinging catfish Heteropneustes fossilis. Fish were treated for 96 hours to a sub-lethal dose of deltamethrin. The blood was drawn from both control and experimental fish, and the haematological parameters total leucocyte count, total erythrocyte count and haemoglobin percentage was measured. The findings showed that while total leucocyte count somewhat increased in experimental fish, total erythrocyte count, haemoglobin percentage, dramatically dropped. As a result of exposure to deltamethrin, the study found that Asian stinging catfish Heteropneustes fossilis blood underwent noticeable modifications.
Key words: Deltamethrin, Heteropneustes fossilis, hematopoietic variables, chemicals