Effects of intermittent chlorination on rainbow trout and yellow perch

Journal Article · Sun May 01 00:00:00 EDT 1977 · Trans. Am. Fish. Soc.; (United States)

DOI:https://doi.org/10.1577/1548-8659(1977)106<278:TEOICO>2.0.CO;2· OSTI ID:7282037

Brooks, A S; Seegert, G L

Rainbow trout, Salmo gairdneri, and yellow perch, Perca flavescens, were exposed to residual chlorine for single 30-minute and triple 5-minute doses. Tests were conducted at 10, 15, and 20 C with both species plus 25 and 30 C for the perch. Single exposure 30-minute LC50 values for the perch ranged from 0.70 mg/liter at 30 C to 8.0 mg/liter at 10 C. Triple 5-minute exposure LC50 values for the perch were 22.6 and 9.0 mg/liter at 10 and 20 C, respectively. Rainbow trout 30-minute LC50 values were 0.99 and 0.94 mg/liter at 10 and 15 C, respectively. Two groups of trout tested at 20 C yielded 30-minute LC50 values of 0.60 and 0.43 mg/liter. Triple exposure 5-minute LC50 values for the trout were 2.87 mg/liter at 10 C and 1.65 mg/liter at 20 C. Mortality occurred immediately after exposure to chlorine in the 30-minute perch tests at 10 and 15 C, but was delayed 2 to 12 hours at the higher temperatures. This pattern was reversed in the 5-minute triple exposure tests. Rainbow trout exhibited rapid mortality in all tests except the 10 C triple exposure series where mortality was delayed 12 to 24 hours. For both species, concentrations resulting in no mortality were approximately one-half the LC50 value.

• Research Organization: Univ. of Wisconsin, Milwaukee
• OSTI ID: 7282037
• Journal Information: Trans. Am. Fish. Soc.; (United States), Vol. 106:3
• Country of Publication: United States
• Language: English

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