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Updated g(0) estimate for western North Pacific Brydeâ€™s whales and its application to previous abundance estimates
Takashi Hakamada, Koji Matsuoka and Tomio Miyashita
International Whaling Commission
An updated g(0) estimate for Brydeâ€™s whale is made and applied to previous abundance estimates that considered g(0)=1. The g(0) estimates was obtained by applying mark-recapture distance sampling methods (MRDS) to sighting data from Independent Observer (IO) mode conducted during the IWC-POWER surveys in 2015 and 2016. Following suggestions from the Intersessional workshop on North Pacific Brydeâ€™s whale Implementation Review, weighted harmonic mean of the g(0) estimates under good and bad Beaufort sea was obtained, by sub-areas.