'Parasites and fungus' killed Qld catfish

PARASITES and fungus are the likely causes of a mass catfish kill-off in the Brisbane River.

About 8000 fork-tailed catfish were found in September floating in the Brisbane River, near Lowood, west of Brisbane, with some as far upstream as Lockyer Creek.

No other fish species were found among the dead.

The Department of Environment said field inspections and laboratory testing of the catfish and water quality found that white spot disease and a freshwater fungus are the likely causes to the fishes' deaths.

Executive Director Andrew Connor said the fish showed damage to the gills and skin which is consistent with symptoms of white spot disease.

White spot disease is known to cause high mortality in catfish.

Laboratory testing also excluded pesticides and toxic algae from involvement in the fish kill.

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