標識再捕の年齢情報を用いた放流魚の体長組成の年齢分解法 A Method for Estimating Age Composition of Released Fish Using Information from Tag Recoveries

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The authors consider a method to estimate the age composition of released fish which are recaptured and landed at fish markets, by use of the mean lengths and SDs of tagged fish, the ages of which are precisely known. Since 1988, brand tagged flounder have been released in Miyako Bay simultaneously with those without tags and these data are used to examine the practicality of the method. For the first step of the procedure, the total number of fish by age is estimated employing a normal length distribution by use of the mean lengths and SDs of tagged fish which are <i>h</i> and younger are groups, and then the number of fish by age is calculated for each length class. For the second step, the number of fish older than age <i>h</i> is estimated as the residual number of <i>h</i> and younger age for each length class. The difference between this method and conventional methods is that a normal distribution for the length frequency of fish older than the <i>h</i> age group is not assumed. The cumulative estimated length frequency of age groups fit well the original length frequency and this suggests the method is applicable.

収録刊行物

  • 日本水産学会誌  

    日本水産学会誌 64(3), 462-468, 1998-05-15 

    日本水産學會

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各種コード

  • NII論文ID(NAID)
    10004853543
  • NII書誌ID(NCID)
    AN00193422
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00215392
  • NDL 記事登録ID
    4482242
  • NDL 雑誌分類
    ZR26(科学技術--農林水産--水産)
  • NDL 請求記号
    Z18-345
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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