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北海道木古内湾におけるアイナメHexagrammos otakiiの年齢と成長

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Title: 北海道木古内湾におけるアイナメHexagrammos otakiiの年齢と成長
Other Titles: Age and Growth of Fat Greenling Hexagrammos otakii in Kikonai Bay, Hokkaido
Authors: 関河, 武史1 Browse this author
高橋, 豊美2 Browse this author
髙津, 哲也3 Browse this author →KAKEN DB
Authors(alt): Sekigawa, Takeshi1
Takahashi, Toyomi2
Takatsu, Tetsuya3
Keywords: Hexagrammos otakii
Age
Growth
Otolith
Issue Date: 2002
Publisher: 日本水産増殖学会
Journal Title: 水産増殖
Journal Title(alt): Aquaculture Science
Volume: 50
Issue: 4
Start Page: 395
End Page: 400
Abstract: Age and growth of fat greenling Hexagrammos otakii collected from Kikonai Bay, Hokkaido were examined. Observation of otolith margin verified that annuli (outer margins of the opaque zone) were chiefly produced between August and September. It was found that the surface method tended to underestimate the age of fat greenling older than 6 years, comparing with the cross section method. Growth of fat greenling was expressed by the von Bertalanffy asymptotic growth function as SLt=435.0 (1-exp^[-0.234(t+1.387)]) for males and SLt=564.6 (1-exp^[-0.138(t+1.927)]) for females, where SLt is the standard length (mm) at estimated age t (years). A significant difference was found in parameters of growth equation between both sexes. It seems that the growth rate of fat greenling in this study area is relative low, because of low temperature during the winter.
北海道木古内湾から採集したアイナメの年齢と成長の関係を調べた。耳石の不透明帯外縁は主に8月から9月に形成される年周輪であることを確認した。横断面薄片法との読み取りの比較から,表面観察法は6歳以上の個体に対して年齢を過少評価しがちであることが判った。t(歳)時の体長をSLt (mm)とすると,成長式は雄でSLt=435.0(1-exp^[-0.234(t+1.387)]),雌でSLt=564.6(1-exp^[-0.138(t+1.927)])と表され,雌雄差が認められた。本研究水域のアイナメの成長は比較的遅く,その原因として冬季間の低水温の影響が考えられた。
Rights: © 2002 日本水産増殖学会
Type: article
URI: http://hdl.handle.net/2115/38491
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 豊美

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