1. Department of Entomology, Stroud Water Research Center, Avondale, PA 19311, USA
2. Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
3. Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Institute of Environmental Science, Carleton University, Ottawa, ON K1S 5B6, Canada
4. Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, Scotland AB24 2TZ, UK
5. Department of Biology, Willamette University, Salem, OR 97301, USA