Recent observations of humpback whales in the Gulf of Alaska: carrying capacity or a cause for concern?

John Richard Moran, NMFS/NOAA, Alaska Fisheries Science Center, Juneau, AK, United States, Christine M Gabriele, Glacier Bay National Park and Preserve, Humpback Whale Monitoring Program, Gustavus, AK, United States, Janet L Neilson, Glacier Bay National Park & Preserve, Humpback Whale Monitoring Program, Gustavus, AK, United States, Kate Savage, NOAA Fisheries, Protected Resources Division, Juneau, AK, United States and Janice M Straley, University of Alaska Southeast, Sitka Campus, Sitka, AK, United States