千葉県館山湾におけるアイゴSiganus fuscescensの年齢と成長

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タイトル別名
  • Age and Growth of Rabbitfish <I>Siganus fuscescens</I> in Tateyama Bay, Japan
  • 千葉県館山湾におけるアイゴ <I>Siganus fuscescens</I> の年齢と成長
  • チバケン タテヤマワン ニ オケル アイゴ Siganus fuscescens ノ ネンレイ ト セイチョウ

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抄録

To understand the life history of rabbitfish, Siganus fuscescens, we examined the age and growth by thoroughly observing otolith sections of the fish caught during 2005 to 2007 in Tateyama Bay, Japan. Standard length (SL) of the rabbitfish (n=1781) caught by set net fisheries ranged from 83 to 357 mm, and that of additional sample (n=5) caught using hand net in Oct. 2007 ranged from 35 to 43 mm. Almost all large sized fish over 300 mm in SL were female. Seasonal change in the proportion of aggregation of grooves at the otolith margin showed that this structure was formed once a year from July to Sep. The maximum ages of male and female were estimated to be 13 and 11 years old, respectively. The von Bertalanffy growth equations were significantly different between male and female, and estimated as follows: SLt = 275 (1-exp(-0.605 (t-0.361))), for male and SLt = 298 (1-exp(-0.537 (t-0.348))), for female, where SLt is the SL (mm) at t (year). Growth curves displayed minute gain of SL after age 3 for both sexes. The growth pattern of the rabbitfish is the growth stagnant coincident with sexual maturation.

収録刊行物

  • 水産増殖

    水産増殖 57 (3), 417-422, 2009

    日本水産増殖学会

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