Table 1.

Concentration-response relationship of African Catfish, Clarias gariepinus exposed to Chloropyrifos.

Concentration μg/l	Log of conc.	24 h	%	48 h	%	72 h	%	96 h	%
32	1.50	2	13.3	6	40	7	46.7	7	46.7
40	1.60	2	13.3	7	46.7	7	46.7	9	60
48	1.68	10	66.7	10	66.7	12	80	13	86.7
56	1.75	13	86.7	13	86.7	15	100	15	100