東シナ海北部のタチウオ体長組成からの年齢組成の推定

DOI 日本農学文献記事索引 Web Site 被引用文献2件

書誌事項

タイトル別名
  • Age structure estimation from size data for hirtail in the nortern East China Sea.
  • 東シナ海北部のタチウオ体長組成からの年齢組成の推定〔英文〕
  • ヒガシシナカイ ホクブ ノ タチウオ タイチョウ ソセイ カラ ノ ネンレイ

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抄録

The estimation of age structure for hadrtail Trichiurus haumera (Forskål) inhabiting the north-ern East China Sea has been tried using size-frequency data over the years. Since most of size-frequency distributions of samples are not clearly polymodal, an improved least-squares method for analysing such data was used. The method does not require initial values of fish number for each age group for starting computation and only requires a possible range for mean size and standard deviation, which can be determined according to biological information. The result of this study shows that the dominant age group in the catches of hairtail is age 1. The effectiveness of this method was compared with the linear approximation and the Marquardt's methods pub-lished by other authors. It is verified that this method could be applicable to non-polymodal frequency distribution for which the last two methods may provide rather poor results.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 54 (10), 1703-1710, 1988

    公益社団法人 日本水産学会

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