Journal of National Fisheries University

PISSN : 0370-9361

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Journal of National Fisheries University Volume 57 Issue 1
published_at 2008-10

Growth model for willowy flounder Tanakius kitaharai from western Sea of Japan during period of stock increase

資源増大期における日本海西部海域産ヤナギムシガレイの成長モデル
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Descriptions
Revised growth models are proposed for willowy flounder Tanakius kitaharai from western Sea of Japan, the population of which has been increasing in recent years. Annual rings of blind side sagittal otoliths were analysed and back-calculated length (TL : mm) equations derived from the otolith radii (R : mm); TL=3.3+110・R (males), TL=3.3+113・R (females) and TL=3.3+112・R (males and females). Von Bertalanffy growth models, L_t=249{1-e^{-0.272(t+0.181)}} (males), L_t=418{1-e^{-0.168(t+0.432)}} (females) and L_t=482{1-e^{-0.130(t+0.368)}} (males and females) fitted well to age-length relationships, using the non-linear least squares method. Each length at a given age was markedly greater than that reported from the same region in the 1960’s.


Creator Keywords
otolith
Tanakius kitaharai
von Bertalanffy growth model
willowy flounder