한국수산과학회

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kfas, vol. 54, no. 5, pp.769-781, October, 2021
DOI. https://doi.org/10.5657/KFAS.2021.0769

A Bayesian State-space Production Assessment Model for Common Squid
Todarodes pacificus Stock Caught by Multiple Fisheries in Korean Waters
한국 해역의 살오징어(Todarodes pacificus) 개체군 자원평가를 위한
베이지안 상태공간 잉여생산량 모델의 적용

안동영·김규한1·강희중2·현상윤*
부경대학교 해양생물학과, 1웰링턴 빅토리아대학교 수학 통계학부, 2국립수산과학원 연근해자원과

Given data about the annual fishery yield of the common squid Todarodes pacificus, and the catch-per-unit-effort
(CPUE) data from multiple fisheries from 2000-2018, we applied a Bayesian state - space assessment model for
the squid population. One of our objectives was to do a stock assessment, simultaneously incorporating CPUE data
from the following three fisheries, (i) large trawl, (ii) jigger, and (iii) large purse seine, which comprised on average a
year about 65% of all fisheries, allowing possible correlations to be reflected. Other objectives were to consider both
observation and process errors and to apply objective priors of parameters. The estimated annual exploitable biomass
was in the range of 3.50×105 to 1.22×106 MT, the estimated intrinsic growth rate was 1.02, and the estimated carrying
capacity was 1,151,259 MT. Comparison with available results from stock assessment of independently analyzed
single fisheries revealed a large difference from the estimated values, suggesting that stock assessment based on
multiple fisheries should be performed.

Keyword : Todarodes pacificus, Multiple fisheries, Bayesian state space Schaefer model, TMB

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