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Most recent fish kill points to an unhealthy river

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Rocky Mouth Creek
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Most recent fish kill points to an unhealthy river

 

By Samantha Elley

One Woodburn farmer has raised the alarm of a recent fish kill that occurred at Rocky Mouth Creek a few weeks ago.

Wanting to stay anonymous, he said the death of more than 100 mullet, carp and herring happened just before the most recent rain event.

“It was definitely in the hundreds,” he said.

“Up until that kill, the fish out the front of my place would keep me awake at night, as they swirl around.”

His concern was the timing of the closing and opening of the flood gates in Rocky Mouth Creek.

“The gates were closed, but there was an outlet for the fish to get through. Why were all fish killed above the weir and not below?” he said.

He indicated that the outlet for the fish could not accommodate them as they tried to move through the river system.

A NSW DPI spokesperson confirmed the fish kill.

“On 3 April 2024, NSW DPI received a report of a fish death event at Rocky Mouth Creek, near Woodburn affecting just over 100 fish,” they said.

“DPI Fisheries Officers have attended the site and attributed the cause of the event to a drop in Dissolved Oxygen (DO) due to a hypoxic blackwater event from a breakdown in organic material.”

Fish kills are defined as a sudden mass mortality of wild fish, according to DPI’s website and are more likely to occur in summer or when there are sudden changes in temperature.

Since October last year there have been five reported fish kills, including the one at Woodburn and another at Ballina on January 13 where thousands of mullet died in the Richmond River to a hypoxic blackwater event.

A hypoxic blackwater event is where organic material, such as leaf litter and woody debris, is washed into the river and its rapid decay consumes dissolved oxygen from the water. The lack of dissolved oxygen in the water can lead to fish kills.

The issue of fish kills is a complex one, according to a spokesperson from Rous County Council.

“Historically, the floodplain has been intensively drained and floodgated for flood mitigation and to allow agriculture to expand,” they said.

“Rous has now inherited responsibility for a large network of historical drainage infrastructure, including the Rocky Mouth Creek floodgates.”

The spokesperson said the floodgate’s primary role is to mitigate the impact of floods on properties upstream, so this is when they are lowered.

“However, when the floodgates aren’t needed for flood mitigation, with the support of surrounding landowners, they can be raised up to allow water to flow up and down the creek, which improves the condition of the waterway,” they said.

“Keeping the floodgates open doesn’t prevent blackwater from being created (as this happens) upstream in low lying areas where grass and other vegetation is flooded and rots.”

Rous County Council has confirmed in a study done by the state government called Coastal Floodplain Prioritisation Study of the Richmond River, that for meaningful improvements to occur in blackwater creation within Rocky Mouth Creek, low lying areas need to be returned to natural swamp and wetland and artificial drainage systems removed.

Floodplain officer Chrisy Clay said the flood mitigation assets owned by Rous County Council are largely historical.

“There was a lot of flood mitigation assets put in place in the 1950s and 60s following the 1954 flood,” she said.

“The late 1800s, early 1900s we had a lot of assets already in place.

“They’re there to reduce the impact of floods…this has been essential for the establishment and expansion of agriculture and the rural settlement of the flood plain.

“Unfortunately, what we didn’t know at the time is that there would be unintended environmental consequences from those works.”

Ms Clay said the very fundamental characteristic of the flood plain has now changed and there isn’t an aspect that hasn’t been altered.

“The hydrology has been completely altered,” she said.

“And that has completely altered the vegetation types, the biodiversity and ecosystems we have there.

“They’ve also impacted on water quality both on the drainage system and in the estuary itself.”

Vegetation types such as reeds and rushes and wetland plants would have been suited to inundation.

“But now we’ve changed them by draining them and the main vegetation type is dryland pasture which starts to decompose and rots during inundation,” said Ms Clay.

She said the worst fish kills she has seen was firstly in 2001 at Wardell.

“The entire estuary had no dissolved oxygen left in it…and nothing can live in that,” she said.

“We had all levels of the food web…die en masse. Fish, crustaceans, oysters, sea grass, prawns…they all died.”

Then in 2008 there was another major fish kill in the Richmond River estuary.

Ms Clay said there was an unfortunate cycle of water quality issues in the area.

“This is why the Richmond River’s been classified as the  most degraded and worst in NSW,” she said.

“Tackling issue of black water is…complicated.

“The science says that how we rectify that is reducing the drainage of these areas.

“Unfortunately, the only mechanism we have for change is through the goodwill of landowners.”

Ms Clay said the changes that need to occur are likely to have a negative impact on their land in regards to agriculture and land value.

“It’s very difficult to garner support we need to have occur from good will alone,” she said.

 

For more Richmond Valley news, click here.

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Vigilance Urged to Combat Invasive Giant Devil’s Fig

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Vigilance Urged to Combat Invasive Giant Devil’s Fig

 

By Robert Heyward

North Coast landholders are being called upon to stay vigilant against the spread of Giant Devil’s Fig (Solanum chrysotrichum), a highly invasive woody weed that poses a significant threat to agriculture and natural ecosystems. This problematic species is prevalent in grazing lands, waterways, forests, roadsides, parks, and gardens, particularly in the coastal regions of northern and central New South Wales.

Ashley Donges, Regional Weed Coordinator for North Coast Local Land Services, highlighted the critical role of community involvement in controlling this invasive plant.

“Preventing the spread of Giant Devil’s Fig is crucial for safeguarding our agricultural productivity and protecting native ecosystems,” Donges said. “We urge all residents and landowners to actively identify and manage this weed to minimise its impact.”

Giant Devil’s Fig competes with desirable pasture species, leading to reduced agricultural productivity and increased costs. The plant contains toxins that can harm livestock if ingested in large quantities, and its sharp prickles can cause injuries to both humans and animals, as well as hinder access to water sources for livestock. In natural landscapes, the weed forms dense thickets that outcompete native vegetation, further degrading the environment.

“Our goal is to equip the community with the knowledge and tools needed to combat Giant Devil’s Fig effectively,” Donges continued. “By working together, we can mitigate its impact and protect our valuable natural resources.”

Under the NSW Biosecurity Act, all residents have a General Biosecurity Duty to prevent, eliminate, or minimise the biosecurity risk posed by Giant Devil’s Fig.

The weed can be identified as a shrub or small tree up to four meters tall, with prickly stems and hairy leaves when young. It produces small, white star-shaped flowers in clusters from autumn to spring, followed by round berries that turn yellow or orange-yellow.

For detailed identification and control methods, residents are encouraged to visit the NSW WeedWise website.

There is a Giant Devil’s Fig Exclusion Zone covering the local government areas of Bellingen, Clarence Valley, Coffs Harbour, Kempsey, Lord Howe Island, Nambucca Valley, and Port Macquarie-Hastings. In these areas, residents must notify their local council if the weed is found and eradicate it immediately. A Containment Zone covering Ballina, Byron, Kyogle, Lismore, Richmond Valley, and Tweed local government areas requires residents to prevent the plant’s spread, reduce its impact, and report sightings to Rous County Council.

For technical advice and assistance, residents can contact their local council’s weeds officer or consult resources available on the NSW WeedWise website

 

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NSW Aquaculture Industry Sets $300 Million Target for 2030

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NSW Aquaculture Industry Sets $300 Million Target for 2030

 

By Ian Rogers

The Minns Labor Government has pledged to collaborate closely with the aquaculture industry to double the farm gate value of New South Wales’ aquaculture sector to $300 million by 2030. This ambitious goal will be pursued through innovative research, ongoing investment in breeding programs, and a strong commitment to enhancing water quality.

The announcement was made in conjunction with the launch of the NSW Aquaculture Vision Statement during the national Oyster Industry Conference held in Port Macquarie, attended by over 300 delegates from across Australia and internationally. The Vision Statement outlines a comprehensive strategy for the development of the state’s aquaculture industries, focusing on seafood production, bioproducts development, and climate change adaptation.

Key initiatives to achieve the $300 million target include:

  • Risk Management: Implementing a breeding program for the oyster industry, alongside exploring alternative species.
  • Innovative Research: Conducting cutting-edge research at DPIRD research stations and in collaboration with industry partners.
  • Expanding Marine Aquaculture: Identifying and opening new areas for marine aquaculture, including mussels, oysters, and algae.
  • Environmental Benefits: Promoting the environmental advantages of aquaculture, such as the nutrient uptake capabilities of algae, oysters, and mussels, which contribute to water quality improvement.
  • Streamlining Biosecurity: Simplifying aquatic biosecurity regulations to enhance access to interstate spat supply.
  • Water Quality Enhancement: Protecting and improving water quality, a critical factor for sustainable aquaculture.
  • Aboriginal Participation: Creating opportunities for Aboriginal communities to engage in aquaculture businesses.

The government, in partnership with the industry, will develop a detailed roadmap to guide the implementation of these initiatives, all aimed at reaching the $300 million goal by 2030.

The oyster sector, the cornerstone of NSW’s aquaculture industry, has seen rapid growth, with a 30 percent increase in farm gate value in 2022/23, reaching $78 million. This sector also contributes over $30 million to the state’s economy, providing thousands of jobs across production, wholesale, processing, retail, and agri-tourism. The industry’s commitment to water quality monitoring and marine environment protection remains a source of pride.

To support the industry’s vision, the Minns Government has announced a $3 million investment in upgrades at the Port Stephens Fisheries Institute. These enhancements will improve breeding and research facilities for shellfish, including oysters and finfish, fostering innovation in seafood production.

Additionally, financial support has been extended to aquaculture and commercial fishing businesses affected by natural disasters and aquatic diseases, such as the White Spot prawn virus and QX disease in Sydney Rock Oysters.

Minister for Agriculture and Regional NSW, Tara Moriarty, acknowledged the challenges faced by oyster farmers in recent years due to storms, floods, and climate impacts. Despite these obstacles, the increasing productivity of the industry reflects its resilience and the dedication of those who work in it. She emphasized that the NSW Aquaculture Vision Statement is a product of the collaborative efforts of oyster farmers, the aquaculture industry, and the government, all working towards a future where NSW-grown oysters are enjoyed both nationally and globally. The government’s investment in research and infrastructure aims to drive sustainable growth, resource development, and innovation within the industry.

Brandon Armstrong, Chair of the NSW Farmers Oyster Committee, expressed optimism about the future, highlighting the industry’s embrace of new opportunities and innovations. He noted that the recent conference served as an important platform for industry stakeholders to connect, share knowledge, and learn from one another, particularly as the Mid Coast region continues to recover from recent hardships.

 

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Free webinar for farmers to learn how RIC loans can help rebuild and recover from severe business disruption

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Free webinar for farmers to learn how RIC loans can help rebuild and recover from severe business disruption

 

Australian Government farm business lender, RIC (Regional Investment Corporation) is hosting a free webinar on 18 September 2024 for farmers, advisers and agriculture industry representatives to learn more about how RIC’s low-cost Farm Investment Loan can help support farm businesses to rebuild and recover after severe business disruption.

RIC Chief Executive Officer, John Howard, said RIC’s Farm Investment Loan is aimed at supporting farmers who have experienced significant financial downturn, as a result of an unforeseen disruption or cumulative impacts to their business.

“Our Farm Investment Loan recognises that unexpected business shocks outside a farmer’s control can play havoc with financial plans. With a low variable interest rate and interest-only terms for the first five years, RIC loans can provide some financial relief to help farmers get back on their feet,” Mr Howard said.

“To be eligible for a Farm Investment Loan, farmers need to show their underlying business is solid, but that they need help to recover following an event that has financially impacted their business, like drought or other natural disasters, or even a biosecurity event.

“More than 100 people from across the country have already registered to learn more from our specialist Agri Lending Manager and one of our customers who will share their experience,” Mr Howard said. Queenslander cattle grazier Rachael Lehmann is pleased to join the webinar to help other farmers learn more about how she and her husband Dane benefited from a RIC Loan. She will share how their low-interest loan supported their recovery and helped improve their business after experiencing drought and successive natural disasters.

The RIC Farm Investment Loan enabled them to refinance part of their existing commercial debt to RIC’s concessional variable interest rate. This allowed the business to improve cash flow, enabling them to recover faster and move forward. “The change in interest rate is quite a substantial amount of money for us, so it has taken the pressure off. It just meant that we were going to have the opportunity to get ahead.

“It’s a huge step up for us and it will have amazing onflow effects for our cost of production and that’s very exciting,” Rachael said.

The Farm Investment Loan provides up to $2 million over a 10-year term with the first five years interest only followed by principal and interest for the remaining five years. The current variable interest rate is 5.18 per cent and there are no fees to apply, make extra repayments, or for early loan repayments.

The free webinar is on 18 September 2024 from 12pm-1pm AEST, to register visit. For more on the Farm Investment Loan visit here. Read more about Rachael and Dane Lehmann’s story here.

 

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