Increasing the Effectiveness of Electrofishing Boats in Low Conductivity Waters

The anode and cathode arrangements on an electrofishing boat using pulsed D.C. output were manipulated to increase the effective area of the electric field. Voltage gradient (volts/cm) measurements were taken at various distances and depths at 90 and 180 degrees in relation to the long axis of the electrofishing boat. The objective of the study was to improve the efficiency of the electrofisher in low conductivity waters. The maximum distance and depth of field increased an average of 71% and 72%, respectively, for the 2 sample sites when comparing the initial configuration (IS-cm anode droppers and a 30-cm side dropper array as the cathode) to the final configuration (30-cm anode droppers and the boat hull with paint removed as the cathode).

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