Haematological Response of African Catfish (Clarias gariepinus Burchell 1822) Fingerlings Exposed to Different Concentrations of Tobacco (Nicotiana tobaccum) Leaf Dust

Table 1

Mean values (±SE) of water quality parameters for the different concentrations of tobacco (N. tobaccum) leaf dust during the 120-hour exposure period.

Parameter	Treatment (mg L^−1)
	0.00	1.25	1.5	1.75	2.00	2.25
Temperature (°C)	22.3±0.0^a	22.4±0.2^a	22.4±0.01^a	22.4±0.1^a	22.4±0.2^a	22.4±0.1^a
Dissolved oxygen (mg L^−1)	8.7±0.1^a	8.1±0.3^b	6.9±0.3^c	5.5±1.1^d	5.1±0.0^e	4.3±2.2^f
pH	6.8±0.0^a	6.5±0.1^b	6.2±0.0^c	5.8±0.2^d	5.4±0.1^e	5.0±0.0^f
Conductivity (µS cm^−1)	102.8±1.2^a	137.2±2.4^b	143.1±2.4^c	148.6±2.3^d	152.4±1.4^e	158.3±1.2^f
Total alkalinity (mg L^−1)	73.8±0.0^a	91.1±0.4^b	102.5±2.1^c	112.5±1.2^d	129.8±0.7^e	137.9±1.4^f

Values in the same row with the same superscripts are not significantly different (𝑃>0.05). SE: standard error of the mean.