Survival of crucian carp,Carassius carassius,exposed to a high low-molecular weight inorganic aluminium challenge |
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Authors: | Antonio B S Poléo Sigurd A Øxnevad Kjartan Østbye Ronny A Andersen Deborah H Oughton Leif A Vøllestad |
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Affiliation: | (1) Division of General Physiology, University of Oslo, P.O. Box 1066, N-0316 Blindern, Oslo, Norway;(2) Division of Zoology, University of Oslo, P.O. Box 1066, N-0316 Blindern, Oslo, Norway;(3) ISEM, Agricultural University of Norway, P.O. Box 26, N-1432 Ås-NLH, Norway |
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Abstract: | Crucian carp were exposed to three combinations of pH and inorganic aluminium concentrations for 25 days. Mortality, plasma chloride and haematocrit, and gill aluminium content were investigated. No mortality was observed in any of the three exposures. Crucian carp survived acidic Al-rich water (pH 5.17) with a high concentration of low-molecular weight inorganic Al species (242 µgl–1) for 25 days. These fish had lowered plasma chloride levels and high amounts of aluminium on their gills compared to fish exposed to acidic Al-poor water (pH 5.16 and 12 µgl–1 Ali) and control water (pH 6.29 and 4 µgl–1 Ali). Haematocrit was the same in all three exposures. Because aluminium was not acutely toxic to the anoxia tolerant crucian carp, the present results give support to the hypothesis that Al polymerization with subsequent hypoxia is of high importance for the mechanism of acute Al toxicity to fish. |
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Keywords: | Crucian carp Carassius carassius Al toxicity surface waters acidification |
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