Oshkosh, Wis., Xov. 31.- Sportsmen are agitated over the discovery that the efiforts of the fishermen have been diverted from the netting of fish to the netting of ducks, and that their opcrations threaten tho extermination or driving away of ducks from thU vicinity. One fisherman is said to have caught 500 ducks in a day. The ducks dive for food, get entangled in a net and drown. They are then barreled and shipped to Green Bay and Chicago. Oíd nets aro used, so that if the nets are captured by the game warde ns the loss will be small.