Open Access
Table 1
Physicochemical and chemical parameters and habitat characteristics of the A. astacus collection site in Mesapios River, Euboea Island.
| Parameters (Units) | Min–Max | Mean |
|---|---|---|
| pH | 6.88–7.89 | 7.57 |
| Water temperature (°C) | 13.1–26.47 | 17.42 |
| Conductivity (µS/cm) | 503–591 | 550 |
| TDS (mg/l) | 134–282 | 269 |
| Salinity (ppt) | 0.22–0.29 | 0.265 |
| Turbitity (NTU) | 0.28–2.72 | 1.67 |
| D.O. (%) | 73.5–115.4 | 96 |
| D.O. (mg/l) | 7.11–11.7 | 9.56 |
| BOD (mg/l) | 0 | 0 |
| Cl (mg/l) | 17.9–20.94 | 19.42 |
| Si (mg/l) | 5.51–6.07 | 5.79 |
| N-NO2 (mg/l) | 0.001–0.002 | 0.0015 |
| N-NO3 (mg/l) | 1.27–2.02 | 1.64 |
| N-NH4 (mg/l) | 0.009–0.013 | 0.011 |
| DIN (mg/l) | 1.28–2.03 | 1.66 |
| TN (mg/l) | 1.42–2.16 | 1.79 |
| P-PO4 (mg/l) | 0.001–0.003 | 0.002 |
| TP (mg/l) | 0.003–0.005 | 0.004 |
| Cobbles and pebbles (16–256 mm) (%) | 50 | |
| Gravel and sand (2–64 mm) (%) | 30 | |
| Mud (0.0625–2 mm) (%) | 10 | |
| Silt and clay (<0.0625 mm) (%) | 10 | |
| Aquatic vegetation (%) | 40 | |
| Canopy cover (%) | 80 | |
| Physicochemical quality | Good–High | Good |
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