plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
Additional Contribution of Information about Fish Market Price to theStock Assessment of Korea Chub Mackerel Scomber japonicus underthe Availability of Population Index Data
유행하·현상윤*
국립부경대학교 해양생물학과
Accurate fish stock assessments depend on data availability. One of the most frequently used assessment models when data are limited is surplus production model (SPM) because it requires time-series data on only two types of information: (i) fishery catch and (ii) an index of population size (e.g., survey index or catch-per-unit-effort (CPUE)). Compared with length- and age-composition data, which are required for more sophisticated stock assessments, market price data are relatively easy to obtain. In this study, we tested whether or not the price information would improve fish stock assessment further in the situation where, both fishery catch and population size index were used. We illustrated our analysis with Korean chub mackerel Scomber japonicus, because the associated data such as fishery catch, CPUE, and market price were available. One of the main findings was the price information did not contribute to fish stock assessment further, given that data on fishery catch and CPUE were already used.
Bayesian estimation, Data-limited assessment, Market price, State-space production model, Korean chub mackerel