What should be done to minimize the risk of injuries to fish during electrofishing?

Using a large anode ring is an effective method to minimize the risk of injuries to fish during electrofishing. A larger anode increases the surface area through which the electric field is applied, distributing the electrical current more evenly. This helps to reduce the intensity of the current experienced by each individual fish, which minimizes stress and potential physical harm to them.

In electrofishing, it is crucial to manage the electrical field's strength and distribution to ensure that fish are immobilized without sustaining injuries. A larger anode ring allows for a gentler electrical field, thereby improving fish safety and enabling more effective captures without causing trauma.

While other options may suggest methods related to voltage, location, or exposure duration, they could inadvertently increase the risk of injury or stress to fish. For instance, using the highest possible voltage can cause excessive harm, and focusing only on shallow areas might not always be feasible or necessary. Similarly, keeping the anode stable for longer exposure could increase stress and potential injury risk. Thus, opting for a larger anode ring strikes a balance between effective capture and fish welfare.