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모의실험을 통한 남해 멸치(Engraulis japonicus)의 어획조건에 따른 가입당 생산 분석

Simulation-based Yield-per-recruit Analysis of Pacific Anchovy Engraulis japonicus in the Korea Strait with Varying Fisheries Regulations

정석근|고성길|이경환
한국수산과학회 (The Korean Society of Fisheries and Aquatic Science)|2017.08|한국수산과학회지 (Korean Journal of Fisheries and Aquatic Sciences)|제50권 제4호|pp. 437-446|DOI https://doi.org/10.5657/KFAS.2017.0437

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키워드

Engraulis japonicusStock assessmentPacific anchovyYield-per-recruit analysis
주제분류수산학

초록

To evaluate the consequences of possible fisheries regulations of anchovy Engraulis japonicus in the Korea Strait, we developed and applied a simulation-based yield-per-recruit (Y/R) model that considered temperature-dependent growth and size-dependent mortality, covering the egg to adult stages. We projected changes in commercial yield and egg production of anchovy with respect to varying biological reference points of 1) the instantaneous fishing mortality, 2) the minimum fork length of anchovy allowed to catch for protecting smaller anchovy (Lc,min), and 3) the maximum fork length allowed to catch for protecting bigger anchovy (Lc,max). Our Y/R model showed that the anchovy yield will be maximized at ca. 1.4×106 tons when Lc,min ranges between 42-60 mm or at ca. 0.8×106 tons when Lc,max ranges from 88-160 mm. At Lc,min=30 mm, the present minimum length of catch, our simulations indicated that the anchovy yield can reach a maximum of 1.2×106 tons in the long-term when the present fishing effort, which annually yields ca. 0.2×106 tons of anchovy, can be increased by a factor of 28. We expect that our simulation-based Y/R model can be applied to other commercially-important small pelagic species in which the traditional Beverton-Holt Y/R model is difficult to apply.

Abstract

To evaluate the consequences of possible fisheries regulations of anchovy Engraulis japonicus in the Korea Strait, we developed and applied a simulation-based yield-per-recruit (Y/R) model that considered temperature-dependent growth and size-dependent mortality, covering the egg to adult stages. We projected changes in commercial yield and egg production of anchovy with respect to varying biological reference points of 1) the instantaneous fishing mortality, 2) the minimum fork length of anchovy allowed to catch for protecting smaller anchovy (Lc,min), and 3) the maximum fork length allowed to catch for protecting bigger anchovy (Lc,max). Our Y/R model showed that the anchovy yield will be maximized at ca. 1.4×106 tons when Lc,min ranges between 42-60 mm or at ca. 0.8×106 tons when Lc,max ranges from 88-160 mm. At Lc,min=30 mm, the present minimum length of catch, our simulations indicated that the anchovy yield can reach a maximum of 1.2×106 tons in the long-term when the present fishing effort, which annually yields ca. 0.2×106 tons of anchovy, can be increased by a factor of 28. We expect that our simulation-based Y/R model can be applied to other commercially-important small pelagic species in which the traditional Beverton-Holt Y/R model is difficult to apply.

참고문헌 (43)

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