체장기반 수산자원평가모델에 적용되는 체장-체중 관계의 연도별 변동성의 중요성
Importance of Considering Year-to-year Variability in Length-weight Relationship in a Size-based Fish Stock Assessment
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초록
This study is an extension of our previous model for a size-based fish stock assessment. In the previous model, we applied an allometric length-weight relationship (W=α ·Lβ ) to convert lengths of fish to weights, and estimated those parameters α and β, using data about lengths and weights aggregated over years. In this study, we focused on whether consideration of temporal (e.g., year-to-year) variability in those estimates (i.e., ^ α and ^ β ) would contributive. After calculating year-specific estimates (i.e., year-specific pairs of ^ α and ^ β ) by applying data about lengths and weights separated by year, we evaluated the contribution of those year-specific pairs of ^ α and ^ β to the performance of the size-based stock assessment model. The model with such year-to-year variability being considered (lower AIC) outperformed that with the variability being ignored (higher AIC). We illustrated this study using data on Korean chub mackerel Scomber japonicus from 2005-2017.
Abstract
This study is an extension of our previous model for a size-based fish stock assessment. In the previous model, we applied an allometric length-weight relationship (W=α ·Lβ ) to convert lengths of fish to weights, and estimated those parameters α and β, using data about lengths and weights aggregated over years. In this study, we focused on whether consideration of temporal (e.g., year-to-year) variability in those estimates (i.e., ^ α and ^ β ) would contributive. After calculating year-specific estimates (i.e., year-specific pairs of ^ α and ^ β ) by applying data about lengths and weights separated by year, we evaluated the contribution of those year-specific pairs of ^ α and ^ β to the performance of the size-based stock assessment model. The model with such year-to-year variability being considered (lower AIC) outperformed that with the variability being ignored (higher AIC). We illustrated this study using data on Korean chub mackerel Scomber japonicus from 2005-2017.
참고문헌 (15)
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