室内飼育におけるクロダカワニナの成長と産仔数 Growth and Number of Newborns in Semisulcospira kurodai (Prosobranchia : Pleuroceridae) Reared in the Laboratory

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Growth and number of newborns in Semisulcospira kurodai reared during 48-52 months under the laboratory conditions were studied. The newborns, which were produced in July 1988 and August 1989, grew up to 10.3mm in mean shell diameter by the age of 1, 11.0mm by the age of 2, 11.5-11.8mm by the age of 3, and 12.0mm by the age of 4. The maximum size of S. kurodai is 13.3mm in shell diameter, 52.0mm in shell height, 7.7g in wet weight with shell at the age of 4. The production of newborns has begun in snails grown up over 9mm in mean shell diameter at the 8-10th months after the birth. Birth of newborns occurred at a water temperature between 12℃ and 24℃. Large number of newborns were produced at a water temperature over 20℃. Number of newborns produced during a month per female is estimated 10-20 individuals at water temperature between 20℃ and 24℃. Large number of newborns during a year were produced by mature females larger than 10mm in mean shell diameter at 1-3 ages. Mean number of newborns produced during a year per female at 1-3 ages is estimated 62-79 individuals.

収録刊行物

  • 貝類学雑誌Venus : the Japanese journal of malacology   [巻号一覧]

    貝類学雑誌Venus : the Japanese journal of malacology 54(2), 123-132, 1995-07-31  [この号の目次]

    日本貝類学会

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各種コード

  • NII論文ID(NAID)
    110004765170
  • NII書誌ID(NCID)
    AN00410236
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00423580
  • NDL 記事登録ID
    3630165
  • NDL 刊行物分類
    RA48(生態--動物)
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z18-27
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS 
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