東シナ海産アカアマダイの成長と成熟の再検討  [in Japanese] Re-examination of growth and maturation of red tilefish Branchiostegus japonicus in the East China Sea  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

東シナ海のアカアマダイ漁業と資源状態は 1990 年代に大きく変わったことから,生物特性も変化している可能性があり,本種の成長と成熟を再検討した。産卵盛期は 9, 10 月,50% 成熟全長は雌雄それぞれ 253 mm, 302 mm であった。成長式は雌雄それぞれ <i>l</i>(<i>t</i>)=375(1−<i>e</i><sup>−0.317(<i>t</i>+0.420)</sup>) と <i>l</i>(<i>t</i>)=520(1−<i>e</i><sup>−0.194(<i>t</i>+0.761)</sup>) と推定された。これらの結果は概ね既往の研究と一致したが,東シナ海内でも海域によって成熟個体の出現などが異なった。今後,資源解析に基づく管理方策及び漁場利用の検討が必要である。<br>

  The catch of red tilefish <i>Branchiostegus japonicus</i> in the East China Sea steeply decreased in the 1990s. Although life history of the red tilefish was studied before the 1970s, the life history traits of the red tilefish will have changed with the decline of population size in the 1990s. We validated the aging method of otolith observation and re-researched the growth and maturation of the fish using monthly samples in 1996-2000. Bertalanffy growth equations of female and male fish were estimated as <i>l</i>(<i>t</i>)=375(1−<i>e</i><sup>−0.317(<i>t</i>+0.420)</sup>) and <i>l</i>(<i>t</i>)=520(1−<i>e</i><sup>−0.194(<i>t</i>+0.761)</sup>), respectively. Fifty percent maturation sizes in total length were 302 mm and 253 mm for males and females, respectively. The spawning season was from May to December with a peak of September to October, and the main spawning season varied among fishing grounds. Obvious changes in age and growth, spawning period, and maturation characteristics were not detected after the steep decline in the 1990s. Based on the life history traits obtained in this study, fisheries management strategies should be re-examined focusing on the variation in spawning season among fishing grounds.<br>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 77(2), 188-198, 2011-03-15

    The Japanese Society of Fisheries Science

References:  30

Cited by:  2

Codes

  • NII Article ID (NAID)
    10029124222
  • NII NACSIS-CAT ID (NCID)
    AN00193422
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00215392
  • NDL Article ID
    11100176
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-345
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
Page Top