Tolerance to Low Concentrations of Dissolved Oxygen of Corbicula japonica.
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概要
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The tolerance of<I>Corbicula japonica</I>to low concentrations of dissolved oxygen (DO) was examined in laboratory experiments using individuals collected from Lake Shinji, Japan. Tolerance varied with water temperature. In anoxic conditions, <I>C. japonica</I>survived for more than 17 days at 10°C and 20°C, while all individuals at 30°C died with in 10 days. The tolerance to anoxia seemed no difference between juveniles and adults. Oxygen consumption of<I> C. japonica</I>was higher at 30°C than 20°C. Even after conditions became anoxic due to respiration, all individuals maintained at 20°C survived more than 50 days. Individuals maintained at 30°C, however, died with in 8 days. The minimum oxygen requirement at 28°C with in a 30-day period was between 1.0 mg/<I>l</I> and 1.5 mg/<I>l</I>.
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