The Confederated Salish and Kootenai Tribes have caught more than 5,200 lake trout with gill nets as they try to remove 100,000 of the non-native fish from Flathead Lake.
The use of gill nets has been a point of contention with state officials concerned the tribe would inadvertently catch threatened bull trout.
Lake trout are outcompeting the native bull trout populations in Flathead Lake.
Tribal fisheries biologist Barry Hansen says the plan calls for removing 25,000 lake trout through the general recreational harvest, 45,000 through the Mack Days fishing contest and between 20,000 and 30,000 fish through gill netting.
The tribes caught 5,232 lake trout the last two weeks of April. One bull trout was caught in the nets and released.
Another 2,487 lake whitefish caught were donated to food banks.