11.5 C
Byron Shire
June 15, 2024

Low oxygen confirmed as source of Tweed fish kill

Latest News

Housing waiting lists jump over 100 per cent for Northern Rivers

Crisis response needed from NSW state government as listings for priority housing increase over 100 per cent in multiple Northern Rivers regions.

Other News

Maive takes on illiteracy in the Northern Rivers

Lismore student Maive McKenzie will be a World Literacy Foundation Youth Ambassador for 2024 and will serve as a local advocate, aiming to increase education and community awareness about the importance of reading and writing and to lift literacy rates in Northern Rivers.  

New Australian Marbles Champion

After a five-year hiatus the battle for the title of Australian Marbles Champion again took place as part of the Old & Gold Festival held in Brunswick Heads last Saturday.

Jagun Alliance – rebuilding Indigenous knowledge

Sustainability is intrinsic to Aboriginal cultural frameworks, all ways of being, knowing and doing. It’s about being in the right relationship with Country, and all the endemic species being in the right relationships, in the kinship Country for Country, Jagun.

Stick to the sand – Tweed Councillors reject Kingscliff DA to change fill on floodplain

Tweed Council has insisted that a Turnock St development use court-ordered sand to protect rainforest, and a rare snail, rejecting the developer’s attempt to vary the conditions.

Broken Head Quarry development plan rears its head once again

Long-dormant plans to turn the former Broken Head Quarry site into a residential development have lumbered out of the bush like a bewildered dinosaur.

Local runners impress at national championships

Byron Bay Runners are producing some of the best track runners in the country, with five of our senior squad athletes finishing in the top ten in their events at Athletics Australia’s recent national championships held in Adelaide, back in April.

Vintage Lakes at Banora Point, showing red azolla on the surface of the lake. While harmless in moderate amounts a carpet of the plant can cause rob the water of oxygen. Photo Tweed Shire Council
Vintage Lakes at Banora Point, showing red azolla on the surface of the lake. While harmless in moderate amounts a carpet of the plant can rob the water of oxygen. Photo Tweed Shire Council

Tweed Shire Council says regular testing has ruled out pesticides, sewerage overflows and algal blooms as causes for a fish kill at the downstream end of Vintage Lakes on April 1.

Council said the tests confirmed low dissolved oxygen was the cause of hundreds of dead bull mullet, which was restricted to the Port Drive and Traminer Court end of the lakes.

Roads and stormwater manager Danny Rose said the lake, which is a stormwater system was subject to regular run-off from the surrounding area, which made managing the water quality and noxious weeds difficult.

‘The vegetation that can be seen on the surface of the lake is predominantly native Red Azolla, a water fern, which is not targeted for weed removal and on its own is not responsible for the fish kill,’ Mr Rose said.

‘The reasons for deoxygenation in this part of the lake could include extended warm weather increasing water temperatures in the lake, a lack of significant rain over summer to flush the drainage system and the decomposition of vegetation in the lake following significant growth since weed harvesting in late November.

‘It is rare for these factors to coincide and a fish kill has not happened here since 2005,’ he said.

‘The best result would be a large rainfall in the catchment to flush the lake.’

All remaining dead fish were removed and taken to landfill on Wednesday and Thursday this week, and Council will continue to monitor the situation.


Support The Echo

Keeping the community together and the community voice loud and clear is what The Echo is about. More than ever we need your help to keep this voice alive and thriving in the community.

Like all businesses we are struggling to keep food on the table of all our local and hard working journalists, artists, sales, delivery and drudges who keep the news coming out to you both in the newspaper and online. If you can spare a few dollars a week – or maybe more – we would appreciate all the support you are able to give to keep the voice of independent, local journalism alive.

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Editorial – Should Mullum’s water remain locally sourced?

The push by members of Council’s Water and Sewer Advisory Committee (WSAC) to retain Mullum’s local water supply is heating up...

Relocalising to find the life we all dream of

Everywhere we look we see signs of economic downturn, environmental destruction and social breakdown. It’s easy to wonder how we can ever improve our lives and those of our kids.

Mullet fishers destroy dunes and native plants at Gawandii Beach, Shaws Bay

Locals and Tuckombil Landcare have expressed concerns over damage to the dunes at Gawandii Beach at Shaws Bay by fisher people who are accessing the beach for the mullet harvesting season. 

Flood-prone land subdivision DA on exhibition

A proposal by developer Callum Sked to subdivide flood-prone land near the Mullumbimby Showground is now on public exhibition on Council’s website until June 25.