30 results
Industry

The feasibility of a financial safety-net: Investigating financial mechanisms to protect oyster growers from disease outbreaks

Project number: 2023-070
Project Status:
Completed
Budget expenditure: $100,000.00
Principal Investigator: Andy Myers
Organisation: NSW Farmers' Association
Project start/end date: 1 Feb 2024 - 5 Dec 2024
Contact:
FRDC

Need

The oyster industry have long recognised their exposure to the unpredictable nature of the environment. Considerable time, effort and resources have been invested in risk mitigation activities. Examples such as Selective Breeding Programs, Quality Assurance Programs, Environmental Management Systems and innovations in growing techniques and animal husbandry are all designed to improve the attritubes of stock and to mitigate the likelihood & severity of a disturbance. It has been identified however, that there has been minimal investment in last resort options that support growers through worst-case scenarios.

While state & federal disaster arrangements are well established to support primary producers following declared natural disasters, the same mechanisms do not exist for disease outbreaks. Attempts to establish an aquatic deed (officially known as the aquatic EADRA - Emergency Aquatic Disease Response Arangement) have so far failed, and traditional stock insurance (such as that available to cattle producers, or ranched tuna) is not readily available to oyster farmers.

This situation has escalted following the Qx outbreak in Port Stephens, NSW. Despite suffering catastophic losses, oyster farmers in this estuary have received little support, beyond fee waivers and assistance associated with flooding events in the region. In 2019, the estuary hosted ~45 oyster farming businesses with an annual GVP of well-over $10m. Almost all of these businesses are now operating part-time, and even the most productive and profitable of growers have needed to find off-farm work to supplement their income. With considerable infrastructure in the water, farmers are unable to walk away from leases, as tipping fees alone are estimated to exceed $5m.

Understandably growers around the state have been rocked by the outbreak, the associated response and lack of financial support, and as a result have been reassessing their own exposure to risk. One thing that has also become clear, is that industry needs to take charge of their own future and look at measures to support their recovery, reestablishment or dignified exit following disease incursions.

This application seeks funding support for NSW Farmers to drive this process. This will involve the development and administration of a tender and contracting process to deliver an options document exploring the advantages and drawbacks of various financial support mechanisms current available and their appropraiteness for implementation in the oyster industry. This will include the investigation of solutions that are estbalished in other states, and other agricultural sectors. It is anticipated that recommedations put forward will be broadly split into 1) mechanisms that can be implemented at the farm/enterprise level, 2) mechanisms that may be implemented at the state/sector-wide level.

The options paper will provide valuable information which may inform the actions of fishing & aquaculture sectors around the country.

Objectives

1. By October 2024, obtain insights into potential financial support mechanisms, and their suitability for implementation in the NSW oyster industry.
Industry

Establishing a Sydney Rock Oyster aquaculture industry in the Gippsland Lakes in partnership with the Gunaikurnai Land and Waters Aboriginal Corporation (GLaWAC)

Project number: 2022-210
Project Status:
Current
Budget expenditure: $400,000.00
Principal Investigator: Craig Ingram
Organisation: Victorian Fisheries Authority (VFA) Queenscliff
Project start/end date: 1 Dec 2024 - 2 Dec 2027
Contact:
FRDC

Need

The Gunaikurnai Land and Waters Aboriginal Corporation (GLaWAC) is exploring aquaculture development opportunities on country and in partnership with the VFA have commenced a small pilot trial of Sydney Rock oyster aquaculture in the Gippsland Lakes in October 2022, the preliminary results from the first 12 months of the trial have been very positive, the partners would like to move the project to the next stage to prove commercialisation.

The Victorian Government and GLaWAC are looking for on-country opportunities that show positive commercial potential for the Gunaikurnai one of the main aims of the trial is for GLaWAC to be in a position to make an informed business decisions at its conclusion on the best business development model and how to move the project to full commercialisation, this is most likely with an existing aquaculture business as a business partner.

SRO were chosen for this project as they are native and endemic in the Gippsland Lakes and have an established market and growing systems. Other species that were considered were Native flat oyster (Ostrea angasi) and the introduced species Pacific oyster (Crassostrea gigas) which are both present in the Gippsland Lakes only Native flat oyster (Ostrea angasi) have been approved for aquaculture production in Victoria. While Native flat oysters (Ostrea angasi) would be an option in the Gippsland Lakes the lack of proven markets and established growing systems was considered high risk, However, Pacific oyster (Crassostrea gigas) have not been approved for aquaculture in Victoria as they are not native and they are considered a invasive species which ruled them out as an option as they would not meet the bush food ethics and direction of Gunaikurnai people, the recognised native title holders of the Gippsland Lakes area.
With the success of the first year of the pilot trial, GLaWAC and the VFA have agreed to move the project to stage 2, which will establish semi-commercial scale plots to investigate the full commercial potential of SRO aquaculture in Eastern Victoria. This stage 2 trial will also provide employment, training and skills development for the Gunaikurnai people.

The trial will involve the establishment of approximately 1 hectare of oyster aquaculture infrastructure across seven replicated trial sites in the Gippsland Lakes (in the general area of the existing pilot trial) and will investigate and compare production in different oyster culture systems.

The project has involved extensive consultation with the seafood industry and aquaculture sector and the pilot project has been strongly supported by the Oyster industry and seafood industry. The pilot project also involved cross sector and community consultation with key stakeholders and the broader community.

Successfully developing a SRO aquaculture industry in eastern Victoria will benefit GLaWAC and the Gunaikurnai people, the broader seafood and aquaculture sectors, and local businesses including transport, tourism, hospitality and other support industries.
The project is of regional and national importance as it meets four of the priority areas of the National Fisheries Plan
• First Nations employment in the sector Key initiatives: 4.2, 7.1
• Sustainable development of the aquaculture sector Key initiatives: 2.6
• Employment, participation and health in the fishing, aquaculture, and seafood sectors Key initiatives: 7.1, 7.2, 7.3, 7.4
• Climate change and adaptation - shifting and shared stocks Key initiatives: 6.2, 6.3, 6.4

There is significant interest across Australia from first nations people to become involved in viable aquaculture ventures. This project aims to develop a new aquaculture industry using an established and marketable product in an area of Australia that is on the current margins of commercial SRO production.
Climate change is already increasing east coast water temperatures and extending the southern range of a number of species. These changes are likely to increase the potential for SRO aquaculture production in Eastern Victoria.

This project also aims to investigate the potential of a viable new first nations aquaculture industry on the Gippsland Lakes. The initial pilot project on which this application is based has shown that the growth and survival of SRO is commercially viable and as the Gippsland Lakes is a large waterway with no aquaculture industry, there is significant potential for a large commercial development based on SRO production in the area to support a regional aquaculture industry and local employment.

Objectives

1. Establish an Indigenous aquaculture industry with GLaWAC on the Gippsland Lakes
2. Improve skills, capacity and knowledge in the aquaculture and marine industries within the Gunaikurnai people
3. Investigate commercial viability of SRO in Eastern Victoria.
4. Develop processes and pathways for new aquaculture projects to Gain shellfish quality assurance.
5. Investigating the impact if any of oyster aquaculture on seagrass in southeast coast estuaries .
6. Investigate different oyster growing systems and subtility to Eastern Victoria
7. Developing a business plan for the commercialisation of the project

Safeguarding our Sydney Rock Oyster industry against QX disease

Project number: 2022-191
Project Status:
Current
Budget expenditure: $200,000.00
Principal Investigator: Cheryl Jenkins
Organisation: Department of Primary Industries and Regional Development (NSW)
Project start/end date: 7 Dec 2023 - 6 Nov 2025
Contact:
FRDC

Need

Outbreaks of QX disease in Port Stephens in 2022 and 2023 mark the continued spread of this disease into Sydney rock oyster (SRO)-producing estuaries in NSW and QLD over the last 50 years. In severe years, QX can cause up to 90% mortalities in affected stock, therefore this disease poses a major threat to an industry that is of substantial economic, historic and cultural value.
Despite the apparent presence of the causative agent (M. sydneyi) in nearly all estuaries undertaking SRO production, disease only occurs in some, and biosecurity protocols further complicate SRO farming as stocks from high-risk estuaries cannot be moved into estuaries that have a lower QX disease risk profile.

Reasons behind the expression of QX disease in some estuaries but not others currently remain unknown. In France, a related parasite, M. refringens, was originally thought to be a widespread cause of marteiliosis in the European flat oyster (Ostrea edulis) as well as mussels belonging to the genus Mytilus. M. refringens O (oyster) type and M (mussel) type, which were originally described due their differential pathogenicities in the respective hosts, have more recently been found to constitute separate species, with M type being renamed as Marteilia pararefringens. A similar situation may exist in Australia with M. sydneyi constituting more than one species and with the more pathogenic strains being responsible for QX disease outbreaks. Historically these questions could not be meaningfully answered due a lack of genetic information about M. sydneyi; however NSW DPI has recently undertaken a genome sequencing project on M. sydneyi that can facilitate strain comparison. Therefore, one aim of this project is to characterise Marteilia strains from estuaries where disease occurs, and compare with those from estuaries where disease does not occur, to better inform biosecurity policies. If the M. sydneyi strains are identical across estuaries, then this may enable biosecurity policy to be modified to allow oyster translocations across so called “high” and “low” risk estuaries. However, if strains do differ across high and low risk estuaries, then any biosecurity policy will be aimed at protecting estuaries not currently experiencing QX outbreaks from the introduction of high pathogenicity strains.

QX disease remains as the primary known threat for SRO production. Due to significant knowledge gaps in how this disease is transmitted, the use of selectively bred QX resistant oysters is the main management tool used to enable cultivation to continue in estuaries where the disease is enzootic. QX survival is a quantitative and a responsive trait where applied breeding offers a good solution to increase QX survival with significant economic benefits for industry. QX survival breeding is reliant on field challenges however, this method works well to increase resistance. Best results for improving QX survival are achieved through a combination of breeding and management practices to minimise impacts. It is recommended to use oysters selected for QX survival as a risk management strategy to reduce stock losses before a QX disease outbreak occurs in an estuary. When oysters selected for QX survival are used in estuaries affected by QX, it is important to deploy spat when M. sydneyi infections have ceased and harvest these oysters prior to a second disease exposure. This relies on specific timing of commercial hatchery production and fast oyster growth which is a trait under selection in combination with QX survival. Field exposures that run over two seasons of QX disease are now used to increase survival following consecutive outbreaks. Other diseases or factors that compromise SRO health prior to or during M. sydneyi infections also reduce the effectiveness of breeding.

Increasing genetic gains for QX survival has been the primary objective of the breeding program since its inception. A genomics project is currently underway which aims to identify genetic markers for QX disease resistance to increase genetic progress for this trait. Batches of Richmond River Rock oyster (RRRO) produced by NSW DPI have shown high levels of of QX disease survival. Prior studies on RRROs suggest that genetically they are classified as SROs but they appear to have developed significant resistance, presumably due to years of exposure to QX in the Richmond River estuary where the disease in enzootic. Preliminary experimental evidence suggests that RRROs display enhanced survival when exposed to QX disease, justifying their inclusion in the selective breeding program. Therefore, the second aim of this project is to assess QX survival of current RRRO families across multiple years of QX exposure and compare these results to other QX-resistant families in the breeding program. This information will be used in this project to formulate a breeding plan to create additional families using batches of RRROs that have been assessed for QX survival.

Objectives

1. To use previously generated genomic data from M. sydneyi to develop a multilocus sequence typing scheme for Marteilia strains from SROs
2. To screen samples collected from low-risk estuaries for M. sydneyi using qPCR
3. To compare Marteilia MLST profiles of qPCR positive samples from low-risk estuaries with those from M. sydneyi MLST profiles from high-risk estuaries.
4. To create 10 additional families (in addition to the families produced for the 2023 year class breeding run) that have a parent sourced from the Richmond River
5. To assess the QX survival of the 10 additional 2023 year class families as spat, adults and over two seasons at multiple sites
6. To generate QX spat survival estimated breeding values (EBVs) for families with RRRO parents produced for the YC2022 and 2023 year classes
7. To collect performance data (QX survival and growth) that allows comparison of RRROs and commercial families from the Sydney Rock Oyster breeding program over two consecutive seasons of QX disease.
Industry
PROJECT NUMBER • 2022-087
PROJECT STATUS:
COMPLETED

QX Seminar and RD&E Prioritisation Workshop

The one-day workshop on 22 November 2022 at Nelson Bay, NSW was attended by twelve oyster growers, thirteen researchers and four staff from industry bodies. Twelve presentations were given by researchers, three of which were given by Zoom. Following discussion during the workshop, a list of...
ORGANISATION:
Oysters Australia Ltd
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