New Wyoming fishing regulations take effect beginning in January. Wyoming anglers generally will be allowed to keep six trout of any size in lakes and rivers around the state but will only be allowed to keep three trout from a river or stream, with only one of the three trout being over 16 inches. There will be exceptions to the general limit in certain waters around the state. The new regulation will allow anglers to keep up to 16 brook trout of any size. The old regulation specified only six brook trout could be over 8 inches.