Table 2
Extreme chemical parameter values of larval culture in flow-through (FT) and recirculating systems (RS) at larval densities of 50 (control), 150 and 300 larvae mL−1. Measurement were carried out on days 3 and 15, except stated otherwise in brackets. The measurements were done for a mixture of outflow seawater from the four replicates of each rearing unit.
| Experiment | Day | O2%Sat. | pH | N-NH4 | N-NO2 | N-NO3 |
|---|---|---|---|---|---|---|
| RS50 | 3 | 98 | 8.01 | 0.32 | 0.0 | 0.0 |
| 15 | 92 | 7.89 | 1.18 (day 11) | 0.01 | 0.0 | |
| RS150 | 3 | 99 | 8.1 | 0.66 | 0.01 (day 4) | 0.0 (day 4) |
| 15 | 72 | 7.6 | 1.88 | 0.23 (day 7) | 0.7 | |
| RS300 | 3 | 98 | 8.01 | 0.56 (day 5) | 0.01 (day 4) | 0.0 (day 4) |
| 15 | 68 | 7.56 | 2.14 (day 7) | 0.21 (day 9) | 0.4 (day 11) | |
| FT50 | 3 | 102 | 7.98 | 0.38 | 0.00 | 0.00 |
| 15 | 92 | 7.98 | 0.96 | 0.03 | 0.00 | |
| FT150 | 3 | 99 | 8 | 0.38 | 0.00 | 0.00 |
| 15 | 87 | 7.91 | 0.98 | 0.03 | 0.00 | |
| FT300 | 3 | 99 | 7.98 | 0.48 | 0.00 | 0.00 |
| 15 | 82 | 7.89 | 0.98 | 0.10 | 0.00 |
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