Age and growth of flathead flounder Hippoglossoides dubius in the sea of Japan off western Hokkaido [Japan]
2009
Itaya, K.(Hokkaido. Central Fisheries Experiment Station, Yoichi (Japan)) | Takashima, T. | Mitsuhashi, M.
Age and growth of flathead flounder Hippoglossoides dubius in western Hokkaido was investigated. The samples were collected from July to November in 2007 using bottom trawl gears of R.V. Oyashio Maru. Ages were estimated from the number of opaque zones in otoliths, on the basis of the birthday as July 1. The von Bertalanffy growth formula, which were fitted to total length TL (t) or body weight BW (t) at age t, were TL(t)=541(1-esup(-0.13(t+0.94))) for female, TL(t)=326(1-esup(-0.28(t+0.48))) for male, BW(t)=1936(1-esup(-0.11(t+0.86)))**3 for female and BW (t)=319 (1-esup(-0.28(t+0.31)))**3 for male. Flathead flounder in western Hokkaido grows greater than in other area.
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