A Monitoring System of Feeding Rate in Daphnia Magna for Toxicity Test

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The monitoring system for feeding rate of <I>Daphnia magna</I> as fluorescent intensity of <I>Chlorella vulgaris</I> was constructed to evaluate toxicities. When 30 daphnids were added to water samples and run the system, the change of the feeding rate by time was measured accuracy. This method revealed that when the toxicants which were potassium dichromate, lead (II) nitrate, Triton X-100, and Benthiocarb were high concentration, the feeding rate decreased compare to the control after 180 minutes exposure. The feeding rate tended to increase linearly after 60 minutes exposure to all toxicants. With low concentrations of toxicants, lead (II) nitrate, Triton X-100, and Benthiocarb, the feeding rate difference 60 minutes exposure and 180 minutes exposure were larger than control. Thus, it was shown that the feeding rate didn't always decrease when toxicants coexisted in low concentration. This method had higher sensitivity than that of acute immobilization test on some toxicants. From these results, it was shown that this system can measure the change of feeding rate. Although it is necessary to improve the sensitivity, conditions, and construction of the system, the toxicity test based on this theory will be used effectively.

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  • 環境化学 : journal of environmental chemistry

    環境化学 : journal of environmental chemistry 16(3), 369-379, 2006-09-24

    Japan Society for Environmental Chemistry

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各種コード

  • NII論文ID(NAID)
    10018783773
  • NII書誌ID(NCID)
    AN10547099
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09172408
  • NDL 記事登録ID
    8528168
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学) // ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z16-2322
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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