Video S2 - Gillnetting Invasive Lake Trout

Video S2. Gillnetting suppression of invasive lake trout in Yellowstone Lake. Apex predatory lake trout, discovered in 1994, invaded Yellowstone Lake and caused a precipitous decrease in abundance of native cutthroat trout. Lake trout are a deep-water dwelling, cold-adapted (< 10°C) predatory species that do not serve as an ecological substitute for cutthroat trout in Yellowstone Lake. Gillnetting suppression efforts were initiated in 1995 and were increased to an effort level achieved in 2012 that led to a reduction in lake trout biomass. Contracted and U.S. National Park Service crews using specialized boats and equipment process > 2,500 km of gillnets annually. Several hundred thousand lake trout carcasses are deposited to deep (> 65 m) regions of the lake. Research is ongoing to document potential affects of carcass deposition on the ecology of Yellowstone Lake.