On the hunt for carp in the St. Croix River

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Osceola, WI, USA — With the Minnesota Department of Natural Resources' electroshock boat nearby, commercial fisherman lower nets into the waters on the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. The commercial fisherman were working with the DNR to try and locate silver carp in the St. Croix River. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — George Richtman watches the waters of the St. Croix River as he bangs a metal weight on he and his partner's boat near Osceola, Wis. Tuesday, Aug. 23, 2011. Richtman creates the noise to drive fish toward the nets they set. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — Minnesota Department of Natural Resources fisheries specialist Joel Stiras, left, and fisheries intern Andrew Carlson use electroshock fishing methods to look for Asian carp species in the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. The electroshock stuns the fish and enables the DNR team to net and examine the species. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — George Richtman pulls nets from the backwaters of the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — Tim Adams, right, and George Richtman collect common carp from their nets on the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. Adams, who is a commercial fisherman in Wabasha, Minn., was working with the DNR to try and locate the silver carp in the St. Croix River. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — Tim Adams frees a northern pike from his nets on the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. Some of the game fish caught in Adams' nets Tuesday were kept by the DNR for use at the Minnesota State Fair display. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — George Richtman passes a buoy as he gathers netting on the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. (MPR Photo/Jeffrey Thompson) link to this photo

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Osceola, WI, USA — George Richtman raises the anchor on the end of the net lines before moving onto another location on the St. Croix River near Osceola, Wis. Tuesday, Aug. 23, 2011. (MPR Photo/Jeffrey Thompson) link to this photo