ISSN:
1749-7345
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Tolerance of snakehead Channa striatus to ammonia was tested at three pH levels (8.0, 9.0. and 10.0) in experimental tanks. At pH 8.0, ammonia LC50 estimates for snakehead at 24, 48, 72, and 96 h were 〉205.7, 〉203.5, 152.6, and 107.3 mg total ammonianitrogen (TAN)/L (or 〉10.3, 〉10.2, 7.6, and 5.4 mg NH3-N/L), respectively. At pH 9.0, ammonia LC50 estimates at 24, 48, 72, and 96 h were 〉52.4, 62.8, 56.1, 43.4 mg TAN/L (or 〉18.0, 21.6, 19.3, and 14.9 mg NH3-N/L), respectively. At pH 10.0, ammonia LC50 estimates at 24, 48, 72, and 96 h were 25.7, 21.6, 20.3, and 18.7 mg TAN/L (or 21.6, 18.1, 17.1, and 15.7 mg NH3-N/L). respectively. Our data indicate that the tolerance of snakehead to ammonia was associated with pH. Thus, we recommend that snakehead should not be subjected to prolonged exposures of NH3-N concentration more than 0.54 ma at pH 8.0, more than 1.49 mg/L at pH 9.0, or more than 1.57 mg/L at pH 10.0.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1749-7345.1997.tb00965.x
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