You may have heard of fly-fishing or spearfishing, but electrofishing? Electrofishing is a common way of fishing that is used by fisheries biologists. They use electrofishing to sample the fish populations in freshwater. Electrofishing is by using electricity to catch fish. Electrofishing boats or small backpack shockers create the electricity.
The biologists shock the fish before they are caught. They are shocked so they are easier to catch without harming the fish with hooks. Biologist use the method of electrofishing to determine
The different types of pulses depend of the size and nature of the catch. In order for electrofishing to be effective it has to be influenced by technical, logistical, biological, and environmental factors. The stronger the electric field and pulse the bigger the fish will be able to be caught.
There are three types of electrofishers.
Backpack electrofishers are gas or battery powered. These work by employing a transformer to pulse the current before it’s delivered into the water. They also have safety features like speakers that make sounds when the unit is operating, quick-release straps, and tilt-switches if the backpack is tilted more than 45 degrees.
Boat electrofishing is when the boat itself is a cathode with the anodes mounted on the bow. The boat makes the fish swim towards the bow and are caught with a dip net.
Another method is available but not prevalent is by illegally diverting electricity from overhead electric lines. This is dangerous and can cause electrocution.