Toxigenic vibrio baselines and optimum storage, transport and shelf-life conditions to inform cold supply chains in the north Australian Tropical Rock Oyster industry

Project number: 2020-043
Project Status:
Completed
Budget expenditure: $199,300.00
Principal Investigator: Karen S. Gibb
Organisation: Charles Darwin University (CDU)
Project start/end date: 30 Mar 2021 - 28 Sep 2023
Contact:
FRDC
SPECIES

Need

Internationally, Tropical Rock Oysters have a poor safety reputation with Vibrio at the top of the list. While a pro-active not reactive approach to vibrio food safety is essential for product assurance and branding, effort needs to be proportional to risk. And risk assessment also needs to be informed by real data. There are certainly knowledge gaps for north Australia, but we know seawater contains up to 42 Vibrio spp. including several known toxigenic species in addition to the human pathogens Vibrio parahaemolyticus (Vp) and V. vulnificus (Vv). We know Vp responds to temperature but Vv does not. And we know Vv concentrations in seawater are higher in the wet season compared to the dry, and more shellfish are Vp and Vv positive in the wet season. So if vibrio diversity and abundance in TRO is seasonal (as shown elsewhere), it is likely that Vibrio spp. infections in humans will also follow a seasonal trend which has implications for risk management. A major bottleneck is that we don’t know how vibrios respond to storage and transport temperatures in TRO. We know that the Pacific and Sydney Rocks respond differently so it is not ‘one size fits all’ and it is certain TROs will be different again. In addition to identifying vibrio baselines in TRO and developing tests for toxigenic species, we will identify the best post-harvest storage and transport temperatures and assess TRO shelf life at realistic storage temperatures. This will provide fundamental information to inform cold supply chains that will support farmers, wholesalers and retailers of TROs from north Australia. We can also use this information to prepare an appropriate and regionally relevant vibrio risk profile for TRO in northern Australia to assist initial risk management activities. This information will provide the developing TRO industry with the knowledge needed to ensure an exemplary reputation, thus giving access to premium markets.

Objectives

1. Measure vibrio baseline in Tropical Rock Oysters and develop tests to vibrio species that are toxigenic to oysters and humans
2. Identify optimum storage and transport temperatures to inform post-harvest cold supply chains
3. Assess TRO shelf life at realistic storage temperatures to maximise product quality and inform cold supply chains
4. Use objective 1-3 outcomes to produce a risk profile for vibrio in north Australian TRO that will support the industry as it seeks to deliver a safe, premium product

Final report

Authors: Karen Gibb Anna Padovan Alison Turnbull Stephen Pahl Samantha Nowland Matthew Osborne Justin Seymour
Final Report • 5.48 MB
2020-043-DLD.pdf

Summary

Toxigenic Vibrio baselines and optimum storage, transport and shelf-life conditions to inform cold supply chains in the north Australian Tropical Rock Oyster industry 

Project products

Fact Sheet
2020-043 project materials.pdf

Summary

Project materials produced for 2020-043

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People
Industry
PROJECT NUMBER • 2021-047
PROJECT STATUS:
CURRENT

Harnessing the aquaculture potential of Queensland’s native rock oysters

1. Overall:Provide an assessment of the most regionally appropriate oyster species and associated production protocols capable of improving oyster farm productivity and achieving broad industry expansion within and beyond SEQ.
ORGANISATION:
Department of Agriculture and Fisheries Brisbane
Industry

Shared science and Indigenous knowledge to support fisheries capacity building in Torres Strait

Project number: 2019-124
Project Status:
Completed
Budget expenditure: $20,210.00
Principal Investigator: Leo X. Dutra
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 20 Dec 2020 - 19 Dec 2021
Contact:
FRDC

Need

Traditional inhabitants from Torres Strait partly or fully own fisheries in the region. In addition to owning or
working in fisheries businesses, some individuals are occasionally involved in research and play a key role in sustainably managing living resources in the region, with several i serving as members on Resource Management Groups (RAGs), Working Groups or in reviewing scientific research proposals as part of the TSSAC. It is therefore important to ensure industry members are up to date with recent developments updated information about fisheries from around the world and are prepared to participate and present their work in these international fora.

This proposal seeks to build capacity in the Torres Strait Fisheries Industry through the active engagement of industry members and CSIRO scientists transferring and sharing knowledge to collaboratively prepare and deliver scientific talks for three major international fisheries-related conferences:
• Marine Socio-Ecological Systems Conference (Japan),
• World Fisheries Congress (Adelaide),
• 12th International Conference and Workshop on Lobster Biology & Management (Fremantle)).

This opportunity will also deepen understanding of scientific approaches and exposure to the latest scientific and technological advances and build capacity of Torres Strait Industry Representatives through co-authoring talks with CSIRO researchers and attending international fisheries conferences to facilitate knowledge exchange and networking.

Objectives

1. Provide opportunities to Torres Strait Industry Representatives to learn about latest developments in fisheries research and management and build capacity through co-authoring talks with CSIRO researchers and attending international fishries conferences

Final report

Authors: Leo X.C. Dutra Eva Plaganyi Frank Loban Patrick Mooka Rocky Stephen and Nicole Murphy
Final Report • 2024-05-31 • 3.44 MB
2019-124-DLD.pdf

Summary

This report presents the results of a collaborative science capacity building project involving CSIRO researchers and Torres Strait Islander Fishing Industry representatives. Project participants worked together in the development and delivery of science capacity building programs tailored to each of the individual Torres Strait participants. The program was explicitly about Indigenous knowledge and perspective around fisheries management from western science, where scientists also had the opportunity to learn and discuss ways forward in combining these two knowledge systems. Torres Strait Island Industry representatives had the opportunity to co-write conference abstracts and present at international fisheries conferences, State and Indigenous fora and attend formal training in aquaculture.