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Blue/Green Algae Spotted In The Oroua River

Horizons Regional Council

Friday 11 January, 2012

Blue/Green Algae Spotted In The Oroua River

Horizons Regional Council is advising people to take care around the Oroua River near Feilding this weekend following the discovery of blue/green algae in the area.

Toxins produced by the algae, also known as cyanobacteria, have been known to cause animal deaths and can cause skin irritation in humans. Dogs and young children are particularly susceptible.

Horizons water quality spokesperson Barry Gilliland says it is not yet known whether this particular strain of cyanobacteria is toxic but preliminary testing is underway. Previous sampling has detected no toxic algae in the Oroua River.
“The slimy, black algae can bloom very quickly in warmer weather and will appear as a shiny black mat on the rocks. Warning signs will be going up today as a precautionary measure and if you see it, it is best to stay away,” Mr Gilliland said.

“If you are concerned your dog may have eaten the algae it is recommended you contact your veterinarian immediately,” he said.

Blue/green algae is present in most of the Region’s rivers all year round and in favourable conditions such as during periods of warm water temperature and low flow, grows quickly and may out compete other algae species if the conditions are right.

For more information about cyanobacteria please visit Horizons website www.horizons.govt.nz.

Horizons Regional Council | 24 hr freephone 0508 800 800 | www.horizons.govt.nz


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