Revised estimates of abundance and migratory destination for North Pacific humpback whales in both summer feeding and winter areas
Paul R. Wade, Terrance J. Quinn II, Jay Barlow, C. Scott Baker, Alexander M. Burdin, John Calambokidis, Phillip J. Clapham, Erin A. Falcone et al.
The first comprehensive photo-identification study of humpback whales throughout the North Pacific occurred in 2004-2006 during the SPLASH project (Structure of Populations, Levels of Abundance and Status of Humpbacks). Photo-identification data were collected for three years (2004-06) in winter areas and for two years (2005-06) in summer areas. Total abundance for the entire North Pacific was estimated by Barlow et al. (2011) to be 21,808 (CV=0.04). Here we estimate abundance within all sampled winter and summer areas in the North Pacific, as well as estimate migration rates between these areas. The revised version adds the parameter estimates for the 5th scenario.