The California Fish and Game Commission declined on Wednesday to take action on a petition by environmentalists and animal-rights activists to discontinue duck hunting at the state-run Tomales Bay Ecological Reserve. During a public hearing in Santa Rosa, officials heard from dozens of residents and received petitions from recreational hunters as well as residents opposed to the existing waterfowl-hunting regulations in some 500 acres of tidal flats and salt marshes. Residents who support the ban,…