Estimated stock size of Japanese flounder (Paralichthys olivaceus) in Kanagawa prefecture [Japan]
2006
Isshiki, T.(Kanagawa-ken. Fisheries Technology Center, Miura (Japan))
Stock size fluctuation was analyzed using virtual population analysis (VPA) on Japanese flounder, Paralichthys olivaceus, in the coastal sea area of Kanagawa prefecture during 1991-2002. The maximum and minimum stock sizes in number were estimated approximately 288 thousand in l996 and 190 thousand in 2001, respectively. In recent years, the stock size in number had been stable with around 210 thousand. Change in recruitment of 0-years-old showed a similar trend to the total stock size with relatively high abundance in 1991, 1996 and 2001 than usual years. High fishing mortality coefficients were estimated for the over 1-years-old. These results suggested high level of fishing pressure on Japanese flounder in Kanagawa prefecture.
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