Open Access
Table 1
Morphologic characteristics of the sampling sites, and number of specimens belonging to the different genetic groups according to the q values: native Mediterranean (q ≥ 0.998), hybrid/introgressed (0.002 < q < 0.998), alien Atlantic (q ≤ 0.002).
| Sampling site | Basin | Watershed area (km2) | Distance from the source (km) | Average slope (%) | Altitude (m a.s.l.) | Average width (m) | Average depth (cm) | Mediterranean group (n° specimen) | Hybrid group (n° specimen) | Atlantic group (n° specimen) |
|---|---|---|---|---|---|---|---|---|---|---|
| Acquasanta | Chienti | 7.09 | 2.65 | 17.02 | 800 | 4.7 | 15.8 | – | 12 | – |
| Ambro | Tenna | 18.23 | 5.18 | 11.04 | 684 | 3.5 | 25.2 | 27 | 16 | – |
| Campodonico | Potenza | 32.04 | 8.53 | 8.53 | 491 | 3.7 | 16.0 | – | 15 | – |
| Cesano | Cesano | 12.06 | 5.37 | 5.37 | 471 | 3.8 | 17.9 | – | 1 | 63 |
| Cinisco | Cesano | 9.04 | 5.42 | 5.42 | 447 | 3.1 | 13.4 | – | – | 10 |
| Nera | Tiber | 164.94 | 33.04 | 4.27 | 495 | 7.0 | 26.0 | 3 | 16 | – |
| San Leonardo | Tenna | – | 1.01 | 20.69 | 1008 | 2.5 | 20.0 | 39 | – | – |
| Tenna 1 | Tenna | 21.78 | 2.27 | 2.27 | 920 | 3.0 | 13.8 | 2 | – | – |
| Tenna 2 | Tenna | 22.60 | 2.99 | 2.99 | 830 | 4.4 | 15.0 | 3 | 12 | – |
| Torsa | Tiber | 12.38 | 4.91 | 4.91 | 568 | 3.1 | 17.4 | 34 | 5 | – |
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