Table 2.
Hypoxia tolerance of pre-settlement and post-settlement larvae and juveniles of C. atripectoralis and P. amboinensis, and of resident larvae and juveniles of A. polyacanthus. ([O2]crit is the lowest water [O2] where the routine MO2 can be maintained, while [O2]out is the [O2] where the fishes showed signs of agitation and were taken out of the respirometer. Values are means±s.d. from 6 to 11 fishes. *p<0.05; **p<0.01; ***p<0.001 (Wilcoxon test) compared to the conspecific pre-settlement larvae (or small larvae of A. polyacanthus.)
| [O2]crit | [O2]out | ||||
|---|---|---|---|---|---|
| routine MO2 | |||||
| species | mass (mg) | (mg kg−1 h−1) | (% air saturation) | ||
| C. atripectoralis pre-settlement | 18.7±1.5 | 2286±520 | 45.0±8.9 | 17.1±2.8 | |
| C. atripectoralis post-settlement | 23.4±2.6*** | 1526±257*** | 34.5±3.4** | 19.4±3.8 | |
| C. atripectoralis juveniles | 71.5±18.5*** | 1577±156*** | 25.4±3.0*** | 12.7±2.5** | |
| P. amboinensis pre-settlement | 32.7±4.8 | 2201±405 | 43.3±5.6 | 14.8±3.2 | |
| P. amboinensis post-settlement | 59.0±18.0* | 1621±263** | 32.1±4.3** | 12.9±4.5 | |
| P. amboinensis juveniles | 102.3±20.2*** | 1145±83*** | 31.4±1.6*** | 14.1±2.9 | |
| A. polyacanthus small larvae | 14.8±2.9 | 2553±673 | 28.3±2.5 | 16.0±1.6 | |
| A. polyacanthus large larvae | 44.8±15.5*** | 2072±304 | 31.2±4.2 | 14.8±2.3 | |
| A. polyacanthus juveniles | 134.4±21.9*** | 1561±185*** | 28.7±6.5 | 12.4±2.9 | |