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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
Address:College of Life Sciences, Sichuan University, No.29, Wangjiang Road, Chengdu, Sichuan Province, 610064, China
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Your Position :Home->Past Journals Catalog->2011 Vol.30 No.2

Effects of pH on the Oxygen Consumption Rate and Ammonia Excretion Rate in Juvenile Megalobrama pellegrini
Author of the article:LI Dai-jin1, HUANG Hui1, TAN De-qing2*
Author's Workplace: (1. Department of Fisheries, Rongchang Campus of Southwest University, Rongchang, Chongqing 402460, China; 2. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 40072, China)
Key Words:pH; oxygen consumption rate; asphyxial point; juvenile Megalobrama pellegrini
Abstract:The effect of different pH (5.5, 6, 6.5, 7.0, 7.5, 8.0 and 8.5) on oxygen consumption rate in juvenile Megalobrama pellegrini was measured in a sealed respiratory chamber. The results showed that the oxygen consumption rate (OCR) changed significantly during 24 hours, OCR during the daytime was higher than that at night, and higher in the afternoon than in the morning, but there was no significant difference during night time. The average OCR at different pH was 0.7135 mg/(g·h). The maximum average OCR was 0.8665 mg/(g·h) at pH 7.5, while the minimum average OCR was 0.5397 mg/(g·h) at pH5.5. The asphyxial point (AP) of juvenile Megalobrama pellegrini was 1.3920, 1.3067, 1.1547, 1.0683, 1.0933, 1.1733, and 1.2331 mg/L at pH 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, and 8.5, respectively. The average AP was 1.2008 mg/L.
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