Confronting a Lake Trout Invasion of Yellowstone Lake: An Interim Scientific Assessment


Confronting a Lake Trout Invasion of Yellowstone Lake

Hickey Brothers Fisheries, LLC, personnel set the lead line for a trap net near Breeze Point in Yellowstone Lake.

Following the confirmation of the presence of nonnative lake trout (Salvelinus namaycush) in Yellowstone Lake during the summer of 1994, the National Park Service (NPS) first sought expert scientific guidance and immediately launched a major suppression program to curtail potential negative consequences to the native Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) and the Yellowstone Lake ecosystem. In August 2008, the NPS again convened a scientific review panel to evaluate the suppression program and provide direction for future suppression and recovery activities. A report of the findings and recommendations of the panel was released in October 2009.

By 2011, the NPS had implemented several of the panel's recommendations and developed a new plan for native fish conservation. Given new information from contracted fishing, lake trout population modeling, three additional years of suppression effort, and proposed actions in a native fish conservation plan, the NPS sought further critical scientific review of the program. This report summarizes recommendations developed during a June 2011 review of the Yellowstone lake trout suppression and cutthroat trout restoration programs.

Read the full report

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