シオミズツボワムシの増殖に与える非解離アンモニアの影響

• 于 建平

  長崎大学水産学部 Department of Fisheries, Faculty of Agriculture, University of Tokyo

• 平山 和次

  長崎大学水産学部

書誌事項

タイトル別名

• Study on the unexpected sudden decrease and suppressed growth of the rotifer population in mass culture - I The effect of un-ionized ammonia on the population growth of the rotifer in mass culture.
• シオミズツボワムシの増殖に与える非解離アンモニアの影響〔英文〕
• シオミズツボワムシ ノ ゾウショク ニ アタエル ヒ カイリ アンモニア ノ
• The effect of un-ionized Ammonia on the population growth of the rotifer in mass culture* 1, 2
• The effect of un-ionized ammonia on the population growth of the rotifer in mass culture
• The effects of un-ionized ammonia on the population growth of the rotifer in mass culture

抄録

In mass culture tanks for the rotifer Brachionus plicatilis, the concentrations of inorganic. nitrogen compounds, pH, water temperature and specific gravity were measured daily at the Aqua-culture Research Laboratory of Nagasaki Prefectural Institute of Fisheries from April to July, 1984. The rotifer density decreased with an increased concentration of un-ionized ammonia nitrogen (NH₃-N). The highest concentration of NH₃-N observed was 3.6ppm. The rotifer densities above 150 rods./ml were observed, only when the pH ranged from 7.3-7.8. Acute toxicity test of NH₃-N to rotifers showed that 24h LC₅₀ value was 17.0ppm at 23°C. Chronic toxicity test showed that concentrations of NH₃-N at which the population growth and the reproduction reduced by 50% of the controls were 13.2 and 7.8ppm, respectively. The concentrations at which the intrinsic rate of population growth and the net reproduction rate were reduced by l% of those of the control, were adopted as the “no-effect” concentration of NH₃-N. They were estimated as 2.1 and 2.4ppm, respectively.<br> The results from mass culture and toxicity tests showed that higher concentration of NH₃-Nmight be one of restrictive factors affecting the increase of the rotifer.

収録刊行物

• 日本水産学会誌

  日本水産学会誌 52 (9), 1509-1513, 1986

  公益社団法人 日本水産学会

キーワード

• Aquatic Science

詳細情報

• CRID: 1390282681389549440
• NII論文ID: 130001542833
• NII書誌ID: AN00193422
• DOI: 10.2331/suisan.52.1509
• COI: 1:CAS:528:DyaL28XmtVCgurk%3D
• ISSN: 1349998X
• ISSN: 00215392
• ISSN: http://id.crossref.org/issn/00215392
• NDL書誌ID: 3110141
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030332971
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3110141
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可