Updated stock abundance indices for shortfin mako (Isurus oxyrinchus) estimated by Japanese longline observer data in the North Pacific Ocean
Citation
Kanaiwa M, Semba Y, Kai M (2021) Updated stock abundance indices for shortfin mako (Isurus oxyrinchus) estimated by Japanese longline observer data in the North Pacific Ocean. In: ISC 2021 1st Shark Working Group Workshop. ISC/21/SHARKWG-1/08, Online
Abstract
In this paper, the updated standardized CPUEs between 2011 and 2019 estimated using the observer data set of Japanese longline operated in North Pacific Ocean were provided. The same statistical model with previous analysis was used. The estimated annual CPUE showed a flat trend between 2011 and 2016 and slightly decreased after 2016.