Table 1 Physico-chemical parameters, annual mean standard deviation, and total range values from NyF and CVA streams (Patagonia, Argentina)
From: Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
| NyF | CVA | |||
|---|---|---|---|---|
| Physical parameters | Mean ± SD | Range | Mean ± SD | Range |
| Water temperature (°C) | 10.4 ± 2.7 | 7.6 to 13.6 | 6.5 ± 2.4 | 4.0 to 9.4 |
| Wet width (m) | 21.1 ± 3.1 | 17.5 to 25.0 | 7.2 ± 2.9 | 4.6 to 11.0 |
| Depth (m) | 0.2 ± 0.1 | 0.19 to 0.32 | 0.2 ± 0.0 | 0.20 to 0.28 |
| Water velocity (ms−1) | 0.8 ± 0.2 | 0.68 to 1.0 | 1.1 ± 0.2 | 0.93 to 1.15 |
| Discharge (m3 s−1) | 4.6 ± 2.4 | 2.71 to 8.0 | 1.9 ± 0.9 | 0.92 to 3.08 |
| Substrate composition (%) | ||||
| Boulder | 20 | 15 | ||
| Cobble | 25 | 30 | ||
| Pebble | 10 | 15 | ||
| Gravel | 30 | 25 | ||
| Sand | 15 | 15 | ||
| Chemical parameters | Mean ± SD | Range | Mean ± SD | Range |
| Conductivity (μS cm−1) | 114.0 ± 2.7 | 112.0 to 118.0 | 50.0 ± 14.0 | 38.0 to 63.0 |
| Dissolved oxygen (mg l−1) | 8.8 ± 1.6 | 7.7 to 11.1 | 11.1 ± 1.7 | 9.7 to 13.0 |
| pH | 7.6 ± 0.4 | 7.2 to 7.9 | 7.3 ± 0.1 | 7.1 to 7.4 |
| Turbidity (TNU) | 4.2 ± 3.9 | 2.0 to 10.0 | 10.0 ± 15.0 | 0 to 27.0 |
| Ammonium (μg L−1) | 1.05 ± 0.5 | 0.6 to 1.6 | 0.86 ± 0.7 | 0 to 1.7 |
| Nitrate + nitrite nitrogen (μg L−1) | 0.18 ± 0.2 | 0.1 to 0.3 | 0.17 ± 0.2 | 0 to 0.3 |
| Soluble reactive phosphate (μg L−1) | 0.37 ± 0.0 | 0.3 to 0.4 | 0.53 ± 0.2 | 0.2 to 0.7 |
| Total suspended solids (mg L−1) | 2.74 ± 0.8 | 1.7 to 3.6 | 2.38 ± 1.8 | 0.7 to 4.4 |