It shall be unlawful for any person to use any firearm, battery, generator or other similar device or any dynamite, explosives, or destructive substances, including poisons, walnut hulls, and lime, for the purpose of catching, killing, taking, or harming fish. The possession of any of the foregoing devices or substances, except firearms, in any boat on the fresh waters of this state shall be deemed prima-facie evidence of guilt under this Code section; provided, however, this provision shall not apply to batteries used to operate motors or lights.