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- Title
Fish kill caused by aluminium and iron contamination in a natural pond used for fish rearing: a case report.
- Authors
SLANINOVA, A.; MACHOVA, J.; SVOBODOVA, Z.
- Abstract
Contamination of Pansky Pond, in March 2013, with 119 mg/l aluminium, and 87 mg/l iron by acidic (pH 3.17) inflow from a nearby quarry caused fish die-off, while exhibiting symptoms of suffocation. Transformation of soluble forms of aluminium and iron into insoluble forms occurred on fish gill where the content of aluminium and iron was 100-fold and 12-fold, respectively, that found in control fish in an unaffected pond. In addition to insoluble aluminium and iron, gills showed presence of iron bacteria. Histopathology was characterised by expression of reactive processes and regressive alterations resulting in gill tissue necrosis. Impairment of the excretory function of gills was reflected in significantly (P < 0.01) higher concentrations of ammonia in the blood plasma of exposed fish compared to the control. Damage to parenchymatous tissues (kidney, liver, spleen) of the exposed fish was manifested as dystrophic alterations, higher aluminium and iron content, and enhanced activity of transaminases in blood plasma compared to the control.
- Subjects
FISH kills; FISH farming; WATER pollution; FISH ponds; METAL content of water; IRON bacteria; HISTOPATHOLOGY; GILL physiology
- Publication
Veterinární Medicína, 2014, Vol 59, Issue 11, p573
- ISSN
0375-8427
- Publication type
Article
- DOI
10.17221/7821-vetmed