鯨胎兒に關する統計的研究

DOI

書誌事項

タイトル別名
  • Statistical Studies of the Whale Foetuses
  • II. Humpback Whale in the Antarctic
  • II.南氷洋座頭鯨

抄録

The present account is chiefly based on “International Whaling Statistics, ” Vol. 6 (1935), Vol. 7 (1936), Vol. 8 (1937) and Vol. 10 (1937), edited by the Committee for Whaling Statistics appointed by the Norwegian Government, Oslo. Some materials from four Japanese floating-factories (1937/1938) were also accounted.<br> 1. Of 1, 131 humpback foetuses 629 or 55•6% were males. This percentage value is more or less larger than those of blue whale 51•1% or fine whale 51•4%. 2. The percentage of the twin-pregnancies to the normal ones (0•42%) is smaller than those of blue whale 0•5% or fin whale 0•8%. The poly-pregnancies above triple were not found. 3. The rate of foetal growth from 2 to 7 solar months of pregnancy can be expressed by the equation'l=ktn, where l is the body length of foetus of t months old, and n and k are constants, of which n=1•5. (In blue whale n=1•9. In fin whale n=1•7)

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390001206417575296
  • NII論文ID
    130000917654
  • DOI
    10.2331/suisan.7.72
  • ISSN
    1349998X
    00215392
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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