周防灘産イシガレイの年令と成長

概要

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Age and growth are the most important parameters for stock assessment. These parameters of stone flounder Kareius bicoloratus in Buzen-Kai of the western part of Suo-Nada were reported in 1974. However, they were not representative of the growth of this species in Suo-Nada.Using 3, 274 otoliths as materials which were sampled in Suo-Nada during the period of 1970-1974, the criterion of age determination and the growth of stone flounder in this area were clarified in this report.Hyaline zone in otolith of stone flounder in Suo-Nada was formed from the beginning of May to the end of November-the beginning of January once a year.Standazd body length and body weight at each full age for both sexes were established, and moreover, growth curves on standard body length and body weight for both male and female stone flounders were represented by von Bertalanffy growth equation.As compared with the state of growth in 1974, a change of the growth of this species in Suo-Nada was not observed in the present condition.It may be important that the criterion for reading of zones in otolith be unified and it is also necessary to develop an objectively counting method of age zones in it.
日本水産學會の論文