Electrofishing

Electrofishing is a fishing technique that uses direct current electricity flowing between a submerged cathode and anode.

[1] Electrofishing is a common scientific survey method used to sample fish populations to determine abundance, density and species composition.

When performed correctly, electrofishing results in no permanent harm to the fish, which return to their natural mobility state in as little as two minutes after being caught.

[1] Electrofishing relies on two electrodes which deliver direct current at high-voltage from the anode to the cathode through the water.

Teams of at least two people are recommended for an effective electrofishing crew: one to operate the anode, and the other to catch the stunned fish with a dip net.

There are a number of safety features built into newer backpack models, such as audible speakers that sound when the unit is operating, tilt-switches that incapacitate the electrofisher if the backpack is tilted more than 45 degrees, and quick-release straps to enable the user to quickly remove the electrofisher in the event of some emergency.

Often the barge can be left stationary on the shore and longer cathodes and anodes allow the crew to sample large areas.

The typical dangers of electrocution, such as electrically induced unconsciousness and the paralysis of the heart and lungs,[10] are compounded by the risk of drowning, which may result from the aforementioned hazards.