1. Department of Environmental Conservation; University of Massachusetts; Amherst; MA; USA
2. U.S. Geological Survey/Biological Resources Division; S.O. Conte Anadromous Fish Research Center; Turners Falls; MA; USA
3. UC Cooperative Extension; Santa Rosa; CA; USA
4. Department of Biology, Faculty of Forestry & Environmental Management; Canadian Rivers Institute, University of New Brunswick; Fredericton; NB; Canada