How is voltage adjusted during electrofishing?

Adjusting the voltage during electrofishing is a crucial aspect of effectively capturing fish without causing harm. The correct choice, which involves modifying output settings on the electrofisher, reflects the operational capability of the electrofishing equipment. Each electrofishing device is equipped with controls that allow operators to set the voltage according to the specific needs of the environment and target species. Different fish species and sizes respond differently to electrical currents, so being able to calibrate the output ensures that the electrofishing process is both effective for capturing fish and safe for those that may be released back into the water.

In contrast, changing fishing techniques, adjusting the size of the net, or varying the time spent fishing do not directly influence the voltage. These methods may affect the overall efficiency of the fishing process or provide different strategies for capturing fish, but do not provide the means to alter the electrical parameters used to induce a catch. Adjusting the electrofisher's output settings is essential for maintaining the right balance between effectiveness and fish welfare.