ティラピア2種Oreochromis mossambicus, O.niloticusとその雑種から成る混群内での釣られ易さの固体差 Individual Catchability in the Mixed Group of Tilapia Species Oreochromis mossambicus, O.niloticus, and Their Hybrids

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Mixed groups of two different species of tilapia <i>Oreochromis mossambicus, O. niloticus</i>, and their hybrids obtained from a river in Ibusuki city, Kagoshima pref. Japan were kept in two concrete tanks and evaluated for their vulnerability to angling. After capture-recapture angling tests, electrophoretic analysis was applied to all specimens to examine the effect of the degree of introgrssion of <i>O. mossambicus</i> and <i>O. niloticus</i> on the individual catchability. The most vulnerable group (three times hooked repeatedly) was composed mainly of <i>O. niloticus</i> and the least vulnerable one (three times unhooked repeatedly) was composed mainly of <i>O. mossambicus</i>. In the hybrids of these species, however, the most vulnerable specimens did not necessarily include more alleles orginally from <i>O. niloticus</i> than those from <i>O. mossambicus</i>, and there was no correlation between the degree of introgression and the catchability. This result implies that the individual catchability in hybrids is mostly determined by a posteriori rather than a priori.

収録刊行物

  • 日本水産学会誌  

    日本水産学会誌 63(2), 166-170, 1997-03-15 

    日本水産學會

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各種コード

  • NII論文ID(NAID)
    10004850700
  • 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
    4173456
  • 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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