1. U.S. Geological Survey; Northern Rocky Mountain Science Center; Glacier National Park; West Glacier MT USA
2. Flathead Lake Biological Station; University of Montana; Polson MT USA
3. U.S. Geological Survey; Montana Cooperative Fishery Research Unit; Montana State University; Bozeman MT USA
4. National Park Service; Glacier National Park; West Glacier MT USA
5. Department of Ecology; Montana State University; Bozeman MT USA