Review of indicator-based analysis of North Pacific shortfin mako conducted in 2021

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This working paper shortly reviews an indicator-based analysis of North Pacific shortfin mako conducted in 2021. Although annual catch, annual abundance indices and length frequency data were provided in the indicator-based analysis in 2021, only abundance index was focused on in this review because abundance index is a useful material to examine the trends in the abundance which is of the most importance to check the stock status. One future issue is raised to enhance the usefulness of indicator-based analyses.