1. Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Dr., Saskatoon, Saskatchewan S7N 5B4, Canada
2. Raincoast Conservation Foundation, Box 86, Denny Island, British Columbia V0T 1B0, Canada
3. Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
4. Environmental Studies Department, 405 ISB, University of California, 1156 High St., Santa Cruz, California 95064, USA
5. Faculty of Environmental Design, University of Calgary, 2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada
6. Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Dr., Saskatoon, Saskatchewan S7N 5B4, Canada
7. Department of Evolutionary Biology, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden