Accumulation of tritium in aquatic organisms through a food chain with three trophic levels.

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著者

    • 小松 賢志 KOMATSU KENSHI
    • 東北大学医学部放射線基礎医学教室 Department of Radiation Research, Tohoku University School of Medicine
    • 樋口 昌孝 HIGUCHI MASATAKA
    • 東北大学医学部放射性同位元素中央実験室 Laboratory for Radioisotopic Research, Tohoku University School of Medicine

抄録

Accumulation of tritium in aquatic organisms was estimated through a model food chain such as;<BR> tritiated water (THO) → diatoms → brine shrimps → Japanese killifish.<BR> Tritium accumulations in each organism as organic bound form are expressed as the R value which is defined as the ratio of tritium specific activity in lyophilized organisms (μCi/gH) to that in water (μCi/gH). The maximum R values were 0.5 in diatoms, <I>Chaetoceros gracilis</I>, 0.5 in brine shrimps, <I>Artamia salina</I>, and 0.32 in Japanese killifish, <I>Oryzias latipes</I> under the growing condition where tritium accumulation took place from tritiated water without tritiated diets. Brine shrimps and Japanese killifish, which grew from larvae to adult in tritiated sea water with feeding on tritiated diets (model food chain), had the R value at 0.70 and 0.67 respectively, indicating that more tritium accumulation in consumer populations with tritiated diets than those without tritiated diets. In addition, the R values of each organ of Japanese killifish, of DNA and the nucleotides purified rfom brine shrimps growing under the condition with or without our model food chain were measured to estimate the tritium distribution in the body or various components of the organism. These results did not indicate the seeking characteristic of tritium to some specific organs of compounds.

収録刊行物

  • Journal of Radiation Research

    Journal of Radiation Research 22(2), 226-241, 1981

    Journal of Radiation Research 編集委員会

各種コード

  • NII論文ID(NAID)
    110002325792
  • NII書誌ID(NCID)
    AA00705792
  • 本文言語コード
    ENG
  • ISSN
    0449-3060
  • データ提供元
    NII-ELS  J-STAGE  NDL-Digital 
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