A person hunting with firearms in Game Zone 9 from the first of May through August thirty-first of each year is guilty of a misdemeanor and, upon conviction, must be fined in an amount not to exceed one hundred dollars or imprisoned for a term not to exceed thirty days. If during any year the opening of the season for the hunting of doves is scheduled to begin prior to September first, the period during which hunting with firearms is prohibited under this section must be adjusted for that year to conform.