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Authorities are investigating the cause behind a fish kill in South Australia’s Riverland.
Millions of dead carp were seen floating on the water at Lake Bonney over the weekend.
The lake in Barmera, about a three-hour drive from Adelaide, is a popular tourist attraction for people visiting the SA stretch of the River Murray.
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The Department of Primary Industries and Regions (PIRSA) said samples had been collected from the site and would be sent for testing.
“Fish kills can be brought on by a variety of causes, including changes to environmental factors such as temperature, salinity, or acidity levels, or through the introduction of disease or pollutants,“ a department spokesperson said.
South Australia experienced its worst flood conditions in decades late last year and early this year after high rainfall events upstream.
A number of towns connected to the River Murray in South Australia experienced fish kills as a result.
Experts said the carp were breeding rampantly in the river’s floodwaters and dying when they were flushed into the seawater.
In NSW, a fish kill in March covered parts of Menindee weir.
The NSW Department of Primary Industries (DPI) said floods and a heatwave had affected water quality and oxygen levels.
The Department of Primary Industries and Regions are investigating the fish kill in Barmera. Credit: Daniel Truscott/South Aussie with Cossie
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