Abstract
Before implementing resource management measures, it is essential to establish the goals of fisheries resource management by assessing the current biomass status and the level of fishing effort. This study aims to compare surplus production models, i.e., process-error and state-space models, based on how they fit the observed data. The effects of the Sandfish Stock Rebuilding Plan are analyzed using a bioeconomic model. The analytical results show that the least error is between the estimated and observed catch per unit effort using the state-space model. Therefore, the analysis results obtained using the state-space model are considered as the most reliable. The total allowable catch for Korean sandfish is set at 2196 tons per year. However, if we increase the current management regulation standard for available annual catch by 50%, the sandfish resource could be depleted. Furthermore, NPV decreased to 172,599 thousand won after ten years, in 2029. Therefore, a recommendation of this study is that when management policies for sandfish stock prioritize recovery, this would facilitate fisheries rebuilding.
Highlights
The need for the management and recovery of fisheries resources has dramatically increased, owing to the declining catch rates by offshore fisheries in Korea
The analysis focuses on the Eastern Danish fishery, which is managed with total allowable catch (TAC) and catches the most considerable amount of sandfish
The state-space model is derived using the WinBUGS (Bayesian inference using Gibbs sampling) program, which specializes in Bayesian inference using Gibbs sampling [23,24]
Summary
The need for the management and recovery of fisheries resources has dramatically increased, owing to the declining catch rates by offshore fisheries in Korea. To manage and protect fisheries resources, seasonal closures, the regulation of size/weight and habitat, as well as total allowable catch (TAC) are currently implemented in Korea. The Korean Fish Stock Rebuilding Plan (KFSRP), launched in. 2006, is a comprehensive fisheries management policy aimed at rebuilding and managing the diminishing fisheries resources. Starting with four fish species in 2006, the Korean. Ministry of Oceans and Fisheries is currently managing 19 fish species. The results of the pilot projects have shown that the KFSRP could contribute toward increasing the stock of selected species. To ensure stable and sustainable business production, effective means of recovering fisheries resources should be established, implemented, and evaluated [1,2,3]
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