1. US Geological Survey, Western Fisheries Research Center, Seattle, WA 98115, USA
2. Prince William Sound Science Center, Cordova, AK 99574, USA
3. Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, USA
4. US Geological Survey, Western Fisheries Research Center, Marrowstone Marine Field Station, Nordland, WA 98358, USA
5. National Park Service, Olympic National Park, Port Angeles, WA 98362, USA
6. US Geological Survey, National Wildlife Health Center, Madison, WI 53711, USA