Fishing has been halted at Corby Boating Lake after some of the lake’s roach were found to be affected by a naturally-occurring disease called white spot.
A spokesman for Corby Council said the ban would last “a couple of weeks” and that the authority has been working in partnership with the Environment Agency since some of the lake’s fish were found dead at the end of last week.
The Environment Agency has now issued the results of their investigations.
A spokesman for the agency said: “Once we heard about this incident, we acted quickly to identify the cause.
“We can now rule out pollution and confirm that only one species of fish is affected.
“The roach have picked up a naturally-occurring and common disease called white spot.
“We believe this has happened because it’s coming up to spawning season, so the fishes’ natural immunity is lower than normal.
“While sad to see, there is nothing untoward going on in the water and this is not something that will spread to other wildlife. We will continue to monitor the situation with our partners at Corby Council.”
Corby Council say they will continue to work with the Environment Agency over the next couple of weeks to monitor the situation.
A spokesman added: “We would like to thank customers for their understanding and patience during this time.”