Via Wikipedia: Fish traps were constructed in the late 1890s on the nearby mouth of the Stikine River and in the Zimovia Strait. These contributed to the growth of the fishing and fish canning industries in Wrangell, which provided much of the economic life for the town before the rise of logging in the 1950s. The fish traps caused severe damage to the Stikine River salmon runs, reducing the number of fish that managed to spawn and causing a decline in salmon runs and fishing in the region. After statehood, the new government decommissioned all fish traps in Alaska. The fishing industry remained strong, and continues to be the primary occupation of many residents.