| Water parameters |
P1 |
P2 |
P3 |
| Water temperature (°C) |
29.9 ± 1.7 |
29.9 ± 1.7 |
29.7 ± 1.9 |
| pH |
8.04 ± 0.23a |
7.96 ± 0.25a |
7.78 ± 0.31b |
| DO (mg L-1) |
6.06 ± 0.42a |
5.99 ± 0.52a |
5.69 ± 0.52b |
| Salinity (ppt) |
12.87 ± 5.34 |
12.74 ± 5.32 |
12.89 ± 5.19 |
| NO2-N (µg L-l) |
16.35 ± 5.83 |
15.91 ± 5.62 |
16.11 ± 6.63 |
| NO3-N (µg L-l) |
93.12 ± 15.41 |
92.66 ± 11.14 |
92.97 ± 8.94 |
| NH4-N (µg L-l) |
30.96 ± 5.61b |
31.19 ± 7.91b |
34.89 ± 6.27a |
| PO4-P (µg L-l) |
32.07 ± 13.43 |
31.91 ± 11.98 |
31.89 ± 12.74 |
| Phytoplankton (numbers/L-1×103) |
15.38 ± 1.62a |
15.12 ± 1.94b |
14.95 ± 1.73c |
| Zooplankton (numbers/L-1×103) |
3.05 ± 0.25a |
2.91 ± 0.23b |
2.83 ± 0.17c |
|
| Means bearing different superscripts indicate statistically significant differences in a row (p < 0.05); Values are expressed as mean ± SE (n=10 for each impoundments every month). |
| Table 1: Water quality parameters of three extensive brackish water farming
impoundments used for grey mullet feeding ecology study. |
