周防灘産マコガレイの年令と成長

概要

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Studies of age and growth of japanese flounder Limanda yokohamae in Su ?? -Nada of Seto Inland Sea were done about ten years ago. However, in recent years, CPUE of this stock is con-sidered to be on the decrease. Therefore, there is a possibility that age and growth of this species have changed in present time. Using 4, 636 otoliths of japanese flounder, it was made clear that hyaline zone was formed once a year as an indication of full age from May to middle of December-March. Based on this result, standard body length and body weight in each full age were established until six years of age for both sexes of japanese flounder in Su ?? -Nada. The growth of japanese flounder in Sendai Bay was better than in Su ?? -Nada. Furthermore, comparing the results that were reported on age and growth of this species in 1974 in Buzen-Kai, in spite of depletion of stock condition, the growth of this species has not become better yet.
日本水産學會の論文