Population Dynamics and Demography of Humpback Whales in Glacier Bay and Icy Strait, Alaska

Humpback whale populations in Glacier Bay and Icy Strait, Alaska, have shown significant growth over 25 years, with estimates rising from a low of approximately 50 individuals in 1986 to nearly 181 by 2009. This study, utilizing standardized sight-resight data collected since 1985 and robust capture-recapture models, revealed an annual population growth rate of about 4.4%. Key findings also include a high annual survival rate of 94.8% and notable temporary emigration patterns, with around 10.6% of whales temporarily leaving the study area each year. These insights underscore the resilience and recovery of this endangered species within a marine protected area, highlighting the importance of long-term monitoring efforts.

Saracco, J. F., Gabriele, C. M., & Neilson, J. L. (2013). Population Dynamics and Demography of Humpback Whales in Glacier Bay and Icy Strait, Alaska. Northwestern Naturalist, 94(3), 187. https://doi.org/10.1898/12-34.1