Table 2
Mean frequencies ± SD of fish species in FLOLIZ and control stations (DCS, NCS) and pairwise comparisons with a Conover-Iman test between station type for night (A) and daytime (B) sampling over the whole sampling period (2019–2022). (NS = No significant/*** for P-value < 0.001/ ** for P-value < 0.01/ * for P-value < 0.05).
| A | NIGHT (Fish traps) | ||||
|---|---|---|---|---|---|
| Species | Stage | DCS | NCS | FLOLIZ | P-value |
| (scientific name) | |||||
| Bleak | Juvenile | 0.032 ± 0.094 | 0.046 ± 0.149 | 0.015 ± 0.111 | NS |
| (Alburnus alburnus) | |||||
| Adult | – | – | – | – | |
| Blenny | Juvenile | 0.15 ± 0.272 | 0.222 ± 0.341 | 0.352 ± 0.457 | NS |
| (Salaria fluviatilis) | |||||
| Adult | 0.126 ± 0.273 | 0.071 ± 0.178 | 0.016 ± 0.078 | NCS/FLOLIZ* | |
| DCS/FLOLIZ* | |||||
| Pike | Juvenile | 0.022 ± 0.113 | 0.028 ± 0.152 | 0.019 ± 0.137 | NS |
| (Esox lucius) | |||||
| Chub | Juvenile | 0.083 ± 0.223 | 0.087 ± 0.234 | 0 ± 0 | NCS/FLOLIZ** |
| (Squalius cephalus) | DCS/FLOLIZ** | ||||
| Adult | – | – | – | – | |
| Roach | Juvenile | 0.054 ± 0.16 | 0.017 ± 0.075 | 0.018 ± 0.081 | NS |
| (Rutilus rutilus) | |||||
| Adult | 0 ± 0 | 0.012 ± 0.086 | 0 ± 0 | NS | |
| Gudgeon | Juvenile | 0.063 ± 0.202 | 0.05 ± 0.156 | 0 ± 0 | NCS/FLOLIZ* |
| (Gobio gobio) | DCS/FLOLIZ** | ||||
| Adult | 0.031 ± 0.113 | 0.013 ± 0.092 | 0.009 ± 0.069 | NS | |
| Perch | Juvenile | 0.176 ± 0.317 | 0.186 ± 0.287 | 0.053 ± 0.203 | NCS/FLOLIZ*** |
| (Perca fluviatilis) | DCS/FLOLIZ** | ||||
| Adult | 0.091 ± 0.223 | 0.055 ± 0.162 | 0.136 ± 0.322 | NS | |
| Nase | Juvenile | 0.001 ± 0.009 | 0.007 ± 0.033 | 0.005 ± 0.034 | NS |
| (Chondrostoma toxostoma) | |||||
| B | DAYTIME (Visual census) | ||||
| Species | Stage | DCS | NCS | FLOLIZ | P-value |
| (scientific name) | |||||
| Bleak | Juvenile | 0.111 ± 0.251 | 0.096 ± 0.217 | 0.022 ± 0.089 | NS |
| (Alburnus alburnus) | |||||
| Adult | 0.035 ± 0.164 | 0.012 ± 0.077 | 0.043 ± 0.174 | NS | |
| Blenny | Juvenile | 0.199 ± 0.315 | 0.254 ± 0.368 | 0.363 ± 0.409 | NS |
| (Salaria fluviatilis) | |||||
| Adult | 0.166 ± 0.301 | 0.287 ± 0.379 | 0.305 ± 0.371 | NS | |
| Pike | Juvenile | 0.026 ± 0.155 | 0.034 ± 0.121 | 0.083 ± 0.25 | NS |
| (Esox lucius) | |||||
| Chub | Juvenile | 0.006 ± 0.031 | 0.014 ± 0.046 | 0.003 ± 0.016 | NS |
| (Squalius cephalus) | |||||
| Adult | 0.011 ± 0.049 | 0.008 ± 0.037 | 0 ± 0 | NS | |
| Roach | Juvenile | 0.043 ± 0.145 | 0.045 ± 0.187 | 0.027 ± 0.089 | NS |
| (Rutilus rutilus) | |||||
| Adult | – | – | – | – | |
| Gudgeon | Juvenile | 0.086 ± 0.189 | 0.019 ± 0.086 | 0 ± 0 | DCS/NC*** |
| (Gobio gobio) | DCS/FLOLIZ*** | ||||
| Adult | 0.028 ± 0.101 | 0.026 ± 0.10 | 0 ± 0 | NS | |
| Perch | Juvenile | 0.103 ± 0.266 | 0.095 ± 0.240 | 0.024 ± 0.073 | NS |
| (Perca fluviatilis) | |||||
| Adult | 0.016 ± 0.066 | 0.017 ± 0.088 | 0.05 ± 0.101 | NCS/FLOLIZ ** | |
| DCS/FLOLIZ ** | |||||
| Nase | Juvenile | 0.003 ± 0.019 | 0 ± 0 | 0.031 ± 0.099 | NCS/FLOLIZ ** |
| (Chondrostoma toxostoma) | DCS/FLOLIZ * | ||||
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