Controlled exposure of brown trout to humic water limed to different pH and inorganic aluminium concentrations
2006 (English)In: Verhandlungen / Internationale Vereinigung für Theoretische und Angewandte Limnologie, ISSN 0368-0770, Vol. 29, 1548-1552 p.Article in journal (Refereed) Published
Fish that accumulated more than 800 μg Al/g dw gill and 900 μg Fe/g dw gill died at pH 4.6 but survived at higher pH. Fish experienced severe physiological responses when gill-Al exceeded 600 μg Al/g. Fish having less than 200 μg Al/g had a satisfactory health status based on the variables monitored. The observation of between-strain variation response suggests that some variation in the dose-response model must considered or that stream specific water quality guidelines needs to be developed.The fish responses and gill-Al can be translated to water quality criteria. Acceptable water quality over a 7-day period for 11-cm yearlings was obtained in water having < 60 μg Ali/L. Following liming, this level was achieved within 15 min at a pH target of 6.0,within 140 min at a pH target of 5.5 (see companionpaper, TEIEN et al. 2005). However care should betaken when applying these criteria to streams, as they will not protect more sensitive life stages at reproductionand hatching.
Place, publisher, year, edition, pages
Stuttgart, 2006. Vol. 29, 1548-1552 p.
Brown trout; humic water, exposure, pH; inorganic Al
Research subject Applied Environmental Science
IdentifiersURN: urn:nbn:se:su:diva-80528OAI: oai:DiVA.org:su-80528DiVA: diva2:556264
The International Association of Theoretical and Applied Limnology (SIL) Congress in Lahti (8-14 August 2004)