Tracing of haematotoxic agents in water with the aid ...
|Title||Tracing of haematotoxic agents in water with the aid of captive fish: a study with captive adult Atlantic salmon Salmo salar in the river Don Aberdeenshire, Scotland|
|Author(s)||N. Everall, C. Mitchell, D. Groman, J. Johnston|
|Journal||Diseases of aquatic organisms|
|Abstract||The riverine location of haematotoxic discharges was determined by exposing adult captive Atlantic salmon to River Don water in situ. Experiments were conducted using a control group and 4 test groups at different distances downstream from a paper mill and field drain discharges. Significant changes in whole blood haemoglobin, plasma cholesterol and bilirubin in salmon from polluted sites indicated the induction of a marked bilirubinaemia in test fish. The most marked pathology occurred in salmon exposed at a site below all the major effluent inputs into the river and suggested additive/synergistic effects between discharges. Pathophysiological changes in captive test fish from the polluted area closely resembled those recorded in wild Don salmon suffering from a non-infectious hyperbilirubinaemia. The effluent cause of the pigmented syndrome in wild Don salmon appeared to be located between the reference site and a point 15 km downstream in the River Don..|
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