Effect of Sudden Drop of Dissolved Oxygen on Population Growth and Feeding in the Rotifer Brachionus plicatilis

• KOISO Masahiko

  Notojima Station, National Center for Stock Enhancement, FRA

• HINO Akinori

  Graduate School of Agricultural and Life Sciences, The University of Tokyo

Bibliographic Information

Other Title

• シオミズツボワムシの増殖および摂餌に対する溶存酸素濃度の急激な低下の影響
• シオミズツボワムシ ノ ゾウショク オヨビ セツジ ニ タイスル ヨウゾン サンソ ノウド ノ キュウゲキ ナ テイカ ノ エイキョウ

Abstract

The effect of sudden drop of dissolved oxygen (DO) level was evaluated in the culture of the rotifer Byachionus plicatilis. We examined daily growth rate, food consumption, egg rate, separated-egg rate and size distribution of lorica length when the rotifer was moved to five oxygen levels (6.8, 4.8, 1.3, 0.7 and 0.3 mg/l) . The food consumption of the rotifer moved to 4.6 mg/l and 1.3 mg/l DO decreased to 54% and 24% of control (6.8 mg/l) within first three hours. However, the food consumption was recovered after next three hours and DO had no effect on daily growth rate and the food consumption after 24 hours. On the other hand, the food consumption of the rotifer moved to 0.7 mg/l and 0.3 mg/l DO decreased to 38% and 20% of control and daily growth rate and egg rate drastically decreased after 24 hours. Especially, in 0.3 mg/l DO, the rotifer showed negative daily growth rate and drastic increase in separated-egg rate. Further, the population over 260μm decreased to approximately half of control. These results suggest that 1) the food consumption of the rotifer decreases temporarily when DO dropped suddenly, even if the difference is small; 2) in extremely low DO near 1 mg/l, population growth and food consumption are greatly affected by even a slight change in DO level.

Journal

• Aquaculture Science

  Aquaculture Science 54 (1), 37-41, 2006

  Japanese Society for Aquaculture Science

Keywords

• <I>Brachionus plicatilis</I>
• Dissolved oxygen
• Food consumption
• Daily growth rate

Details

• CRID: 1390001204715809536
• NII Article ID: 10017970303
• NII Book ID: AN00124667
• DOI: 10.11233/aquaculturesci1953.54.37
• ISSN: 21850194
• ISSN: 03714217
• NDL BIB ID: 7889827
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030723753
• Web Site: http://id.ndl.go.jp/bib/7889827
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7889827
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed