1. Marine Mammal Laboratory NOAA‐NMFS Alaska Fisheries Science Center Seattle Washington USA
2. Department of Biology University of Washington Life Sciences Building, Box 351800 Seattle Washington USA
3. Warnell School of Forestry and Natural Resources University of Georgia 180 E. Green St. Athens Georgia USA
4. U.S. Geological Survey Washington Cooperative Fish and Wildlife Research Unit School of Environmental and Forest Sciences & School of Aquatic and Fishery Sciences University of Washington Box 355020 Seattle Washington USA
5. Quantitative Ecology and Resource Management University of Washington Seattle Washington USA
6. School of Environmental and Forest Sciences University of Washington Seattle Washington USA
7. Washington Cooperative Fish and Wildlife Research Unit School of Aquatic and Fishery Sciences University of Washington Seattle Washington USA