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Base additions to flowing acidic water: Effects on smolts of Atlantic salmon (Salmo salar L.)

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Abstract

Acidic, Al-rich soft water (pH=5.1, Ca=1.0 mg L−1 and labile Al=160 μg Al L−1) was treated by addition of soda (Na 2Co3) and lime slurry (CaCO3). Seven different water qualities of each type of treatment, covering the pH-range 5.1 to 8.2, were prepared in a flow-through system. Smolts of Atlantic salmon (Salmo salar L.) were used as test fish. In both types of treatment, mortality occurred at all pH-levels below 6.05. Above pH 6.05 no mortality occurred using lime slurry. Using soda, 10 % mortality occurred within 48 hr at pH above 7 due to the toxicity of aluminate at low levels of Ca. Plasma chloride levels indicated no physiological stress in the pH-range 6.45 to 7.0.

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Author notes

  1. O. K. Skogheim, B. O. Rosseland & F. Kroglund

    Present address: Norsk Biotech A/S, Krossen N-4301, P.O.Box 788, Sandnes, Norway

  2. E. Hoell

    Present address: NORCEM A/S, N-3950, Brevik, Norway

Authors and Affiliations

  1. Fish Research Division, Directorate for Nature and Management, Tungasletta 2, 7000, Trondheim, Norway

    O. K. Skogheim, B. O. Rosseland, E. Hoell & F. Kroglund

Authors
  1. O. K. Skogheim
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  2. B. O. Rosseland
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  3. E. Hoell
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  4. F. Kroglund
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Skogheim, O.K., Rosseland, B.O., Hoell, E. et al. Base additions to flowing acidic water: Effects on smolts of Atlantic salmon (Salmo salar L.). Water Air Soil Pollut 30, 587–592 (1986). https://doi.org/10.1007/BF00303321

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  • DOI: https://doi.org/10.1007/BF00303321

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