Table 6. Change of dissolved oxygen (DO) concentrations under the 5 ppm clove oil in river puffer, Takifugu obscurus and tiger puffer, T. rubripes at a simulated transport experiment*.
| Elapsed time (hours) | DO (mg/L) | |||
|---|---|---|---|---|
| River puffer | Tiger puffer | |||
| Control | 5 ppm | Control | 5 ppm | |
| Pre-experiment | 7.5±0.32a | 7.5±0.32a | 7.5±0.32a | 7.5±0.32a |
| 1 | 6.4±0.26b | 6.9±0.24a | 6.5±0.23a | 6.7±0.25a |
| 2 | 6.1±0.23a | 6.2±0.19a | 5.9±0.22a | 6.1±0.20a |
| 3 | 4.9±0.24b | 5.4±0.21a | 5.0±0.24a | 5.2±0.22a |
| 4 | 4.2±0.17b | 4.6±0.22a | 4.1±0.20b | 4.8±0.23a |
| 5 | 3.7±0.18b | 4.1±0.16a | 3.7±0.21b | 4.1±0.19a |
| 6 | 3.3±0.20b | 3.7±0.14a | 3.5±0.19b | 3.9±0.18a |
*
The values are means of triplicate groups (n=50).
Different small letters indicate significant differences for the different clove oil dose at same elapsed transporting time (p<0.05).