Table 2

Settings of the electrofishers (associated with waveform codes) during application of the Eel Abundance Index (EAI) and Salmonid Abundance Index (SAI-2015 and SAI-2017) protocols, with the radius of attraction (RADAC) its associated power density. For the RADAC, four measurements were taken. Values in brackets: standard error.

Protocol Waveforms code Engine Cathode dimensions Anode dimensions Waveforms Frequency (Hz) Pulse width (ms) Peak voltage at the anode (V) RADAC (cm) Power density (μW.cm−3)
EAI PDC-0Hz Hans Grassl® ELT60II GI Honda GXV50 (1300 W) Length: 150 cm, width: 2.5 cm, thickness: 0.3 cm diameter: 35 cm ; gauge : 0.6 cm DC n/a n/a 228 174 (1) 1.45
PEC-20Hz Imeo® Volta (80 W) Length: 120 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 1.6 cm PEC 20 2.25 139 187 (1) 1.45
PDC-20Hz Smith Root® LR-24 (400 W) Length: 110 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 0.6 cm PDC 20 12.5 153 172 (2) 1.45
PDC-400Hz Dream Electronique® Martin-Pêcheur (240 W) Length: 110 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 1.6 cm PDC 400 0.48 194 184 (8) 1.45
SAI-2015 PDC-0Hz Hans Grassl® ELT60II GI Honda GXV50 (1300 W) Length: 150 cm, width: 2.5 cm, thickness: 0.3 cm diameter: 35 cm ; gauge : 0.6 cm DC n/a n/a 215 150 (0) 1.84
PEC-40Hz Imeo® Volta (80 W) Length: 120 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 1.6 cm PEC 40 2.25 139 154 (5) 1.84
PDC-40Hz Smith Root® LR-24 (400 W) Length: 110 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 0.6 cm PDC 40 6.25 153 148 (2) 1.84
PDC-100Hz Dream Electronique® Martin-Pêcheur (240 W) 4 braids (length: 85 cm, width: 1 cm, tickness: 0,3 cm) diameter: 35 cm ; gauge : 1.6 cm PDC 100 0.40 160 160 (5) 1.84
SAI-2017 PDC-0Hz Hans Grassl® ELT60II GI Honda GXV50 (1300 W) Length: 150 cm, width: 2.5 cm, thickness: 0.3 cm diameter: 35 cm ; gauge : 0.6 cm DC n/a n/a 190 174 (5) 2.07
PDC-50Hz Smith Root® LR-24 (400 W) Length: 110 cm, diameter: 0.5 cm diameter: 35 cm ; gauge : 0.6 cm PDC 50 25 178 188 (7) 2.07
PDC-100Hz Dream Electronique® Martin-Pêcheur (240 W) 4 braids (length: 85 cm, width: 1 cm, tickness: 0,3 cm) diameter: 35 cm ; gauge : 1.6 cm PDC 100 10.70 213 204 (6) 2.07
PDC-400Hz Dream Electronique® Martin-Pêcheur (240 W) 4 braids (length: 85 cm, width: 1 cm, tickness: 0,3 cm) diameter: 35 cm ; gauge : 1.6 cm PDC 400 12.70 213 192 (6) 2.07

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