Toxicity and behavioural changes in Tilapia mossambica exposed to neemta 2100
Mahira Parveen* and Fraz Ahmad
*Department of Zoology Govt. P.G. Collage, Bina 470113 (India) mahira_pp@yahoo.co.in
ABSTRACT
The present study was aimed to determine the lethal concentrations for neemta 2100 to fish Tilapia mossambica for prolonged periods. The LC50 values were determined as 0.007 ppm for 15 days and 0.005 ppm for 30 days. At this concentration gradual decline in opercular movement, lethargic behaviour and thick mucous secretion were observed during experiment. It is observed that neemta 2100 has toxic properties even in small amount. Active principle, Azadirachta indica, Pesticide