Fish die-off investigated

Otago Fish & Game 
...
Otago Fish & Game Council field officer Jack Harland measures oxygen levels near a dead fish floating in lower Silverstream last week. PHOTO: OTAGO FISH & GAME COUNCIL
An investigation has been launched after hundreds of eels and trout "perished" in the lower Silverstream on the Taieri due to the impact of flooding earlier this month, the Otago Fish & Game Council says.

Council chief executive Ian Hadland, of Dunedin, said rotting grass and vegetation lying beneath ponded floodwater was known to decrease water oxygen levels as it broke down.

"There are dead and decomposing fish everywhere and dead worms all over the stream bottom — it’s a tragic sight."

A stench of rotting fish and vegetation emanated from a section of Silverstream, near Riverside Rd.

"It’s in a bad state — man alive."

The conditions, combined with heat, were the "perfect recipe" for creating an environment without oxygen to form, Mr Hadland said.

Oxygen levels in the lower Silverstream remained "very low" last week. The levels were "borderline lethal for fish".

An Otago Regional Council spokesman said water samples had been taken to rule out other causes for the deaths of the fish species.

Analysis of the samples in a laboratory continued this week, he said.

 

Add a Comment

 

drivesouth-pow-classic-2.png

 

Advertisement

postanote_header_620_x_80.png

postanote_620_x_25.jpg

Our journalists are your neighbours

We are the South's eyes and ears in crucial council meetings, at court hearings, on the sidelines of sporting events and on the frontline of breaking news.

As our region faces uncharted waters in the wake of a global pandemic, Otago Daily Times continues to bring you local stories that matter.

We employ local journalists and photographers to tell your stories, as other outlets cut local coverage in favour of stories told out of Auckland, Wellington and Christchurch.

You can help us continue to bring you local news you can trust by becoming a supporter.

Become a Supporter