Table 3.
Effect of Lethal and Sub-lethal concentrations of copper sulphate on the metabolic rate (mg O2/g/h) Esomus danricus at the end of 24h, 48h, 72h and 96h.
| Conc. of Cuso4.5H2o | Period of Exposure | Metabolic Rate mg O2/g/h | % Change | ‘t’ value | Result | |
|---|---|---|---|---|---|---|
|
| ||||||
| Control X̄ ± SD | Experiment X̄ ± SD | |||||
| 5.5 mg/L | 24 h | 2.87 ± 0.24 | 2.46 ± 0.08 | −14.28 | 3.6155 | P<0.01 |
| 48 h | 2.42 ± 0.03 | −15.67 | 4.2571 | P<0.01 | ||
| 72 h | 2.04 ± 0.12 | −28.91 | 7.0452 | P<0.001 | ||
| 96 h | 1.72 ± 0.02 | −40.07 | 10.9305 | P<0.001 | ||
|
| ||||||
| 0.55 mg/L | 24 h | 2.87± 0.24 | 2.08 ± 0.14 | −2.44 | 0.5686 | P>0.05 |
| 48 h | 2.76 ± 0.22 | −3.83 | 0.7607 | P>0.05 | ||
| 72 h | 2.45 ± 0.07 | −14.63 | 3.8321 | P<0.05 | ||
| 96 h | 2.16 ± 0.05 | −24.74 | 6.6003 | P<0.001 | ||