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@sashaharperr4: dont miss it😭👇
sashaharperr4
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Saturday 10 October 2026 02:45:32 GMT
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Electrofishing uses an electric field, emitted from a pulser, to temporarily stun fish. The fish can then be collected via dip net for identification. Data collected from electrofishing can be used to determine abundance, density, species composition, and health of fish populations. This tool uses direct current electricity flowing between electrodes, one of which is an anode. When the proper amount of current is applied to the water, fish are drawn toward the anode through involuntary muscle movements. Upon reaching the anode, fish are stunned. Batteries supply the electrical current in backpack units. The anode is located at the end of a long pole held by the operator and the cathode is a cable that trails behind the operator. In larger streams and rivers, the method is similar, with a generator helping to provide electrical current on a floating raft or boat instead of a battery in a backpack. When electrofishing from a boat, the anodes are mounted on two booms off the bow of the boat. For some boats, metal wires dangling in the water at the front of the boat are also anodes. The boat itself is the other electrode, the cathode. The stunned fish are drawn toward the anodes, where they are caught with a net. When electrofishing is performed correctly, the fish are temporarily stunned, allowing biologists to collect them using dip nets. Fish recover fully in a matter of minutes, sometimes in seconds, and are returned to the water quickly. Recovery time varies with species, water temperature, and amount of current used. Biologists are careful to use the least amount of current possible to ensure fish are stunned but not harmed. If scientists are electrofishing from a boat, fish are collected and held in a tank until they are released. (Video Credit: @Kentucky Afield) #History #Science #education #learn #invention #entertainment #news #interesting #Tech #facts #story #fyp #viral #explore
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