Studies on the effect of different pesticides and their combinations at 48 and 96 hour exposure on water (Moisture), protein content and calorific values in a fresh water teleostean fish, Mystus vittatus (Bloch) has been made. The treatment of Kelthane (an organochlorine), Metacid 50 (an organophosphate pesticide) and Dithane M-45 (a carbamate pesticide) increased the water content in M. vittatus, though the effect was more pronounced at 96 hr exposure as compared to 48 hrs exposure. The treatment of pesticides brought significant decrease in protein content and calorific values (k/cal/g), the maximum decrease was observed after the treatment of Metacid at 8.0 ppm after 96 hrs exposure. The details have been discussed in this paper.
The calorific values (Total and K. cal/g dry weight), moisture, protein and ash content in relation to sex and body weight were studied in Macrognathus aculeatum (Bloch). With unit increase in body weight the total calorific values, moisture, protein and ash content increased by powers of 0.720, 0.969, 0.876 and 1.376 respectively. The females showed higher calorific value (4.320 K.cal/g) than that of males (4.052 K.cal/g).