Contextualising shellfish food safety in Northern Australia

Project number: 2020-021
Project Status:
Current
Budget expenditure: $147,000.00
Principal Investigator: Sarah C. Ugalde
Organisation: University of Tasmania
Project start/end date: 31 Dec 2020 - 29 Jun 2022
Contact:
FRDC
SPECIES

Need

The emerging edible oyster industry in northern Australia involves Aboriginal communities, industry and governments and is working towards improvements in productions systems, biosecurity and capacity development. Initial volumes produced by this developing industry are likely to be small scale, targeting local markets, however there is significant potential to expand overtime to service the broader Australian and international markets.

To enable industry access to supply these markets there is a need to ensure appropriate food safety. Preliminary shellfish quality assurance assessments have been conducted at oyster farming trials in Western Australia and the Northern Territory. However, there remains a gap in the knowledge of shellfish food safety risks and the most appropriate way to administer a shellfish food safety program in Northern Australia.

Information on the specific food safety risks in tropical Australia to inform the application or contextualise ASQAP in Northern Australia remains a gap. There is also a further need to consider how ASQAP can be applied to a developing industry in a remote context. Tropical Australia has unique challenges of temperature, environment, limited infrastructure and remoteness. The emerging tropical oyster industry requires an assessment of the risks and options to manage the sale of an initial small-scale production of farmed bivalve shellfish produced in Northern Australia.

Objectives

1. Perform an assessment of food safety concerns and associated risks in tropical Australia
2. Provide recommendations on appropriate harvest area classification systems (based on water and/or meat results) and monitoring and risk management protocols for oyster farming in tropical Australian environmental and remote contexts
3. Develop models for shellfish food safety programs in tropical Australian conditions

Related research

Industry
Adoption
Adoption
PROJECT NUMBER • 2022-133
PROJECT STATUS:
COMPLETED

Sponsorship of World Aquaculture 2023

1. Support organisation of World Aquaculture 2023
ORGANISATION:
Associated Advertising and Promotions Pty Ltd

Development of a sustainable scallop (Ylistrum balloti) fisheries enhancement program for Western Australia: Preliminary Feasibility Study

Project number: 2019-068
Project Status:
Current
Budget expenditure: $920,050.00
Principal Investigator: Clayton M. Nelson
Organisation: One Sea Pty Ltd
Project start/end date: 31 Oct 2020 - 30 Apr 2023
Contact:
FRDC

Need

A substantial rise in future demand for seafood is forecast with ocean fishery productivity projected to decline by up to 50% in some fisheries due to ecological disruptions. A key challenge therefore will be maintaining fishery productivity. Shark Bay and the Abrolhos Islands scallop fisheries are prime examples - following the extreme marine heat wave of 2011 lost income from these fisheries is estimated at $53 million GVP, or $155 million including multipliers.

The integration of aquaculture and wild fisheries is becoming increasingly recognised as a tool for enhancing fishery productivity (Taylor et al, 2017). Re-stocking and stock enhancement following recruitment failure could lead to faster fishery recoveries, and also be used to supplement natural recruitment to provide a more consistent and higher yield harvest from year to year. Development of supply chains for scallops into domestic and overseas high-value live markets requires consistent supply. Due to climatic variability and highly variable natural recruitment there is an urgent need to investigate scallop stock enhancement using hatchery-produced juveniles in WA.

A key element for success will be the development of reliable, efficient and scalable seed production systems, which will be based on previous research findings integrated novel, contemporary shellfish production technology. During this project, 16 million cultured scallop spat are planned to be released. The annual yield of scallops from the Rottnest SWF Zone A is 25 to 50 tonnes (whole scallop weight), or approximately 250,000 - 500,000 scallops assuming an average weight of 0.100 kg/whole scallop. This Project aims to release on average 8 million spat each year of the Project (600,000, 1,500,000 and 6,000,000 of 10mm, 5mm and 2mm spat respectively), which could contribute 45,000 hatchery-produced scallops to the catch each year assuming 2.50%, 1.00% and 0.25% of 10mm, 5mm and 2mm spat released respectively were captured, increasing yield by 8.3 – 16.6 % in the annual production, demonstrating the feasibility of scallop stock enhancement.

Objectives

1. Develop and validate genetic tools to determine parentage / origin of scallops and measure genetic diversity
2. Develop hatchery and nursery protocols for consistent production of scallop spat
3. Develop strategies and methodologies for scallop spat deployment and stock enhancement sampling
measurement of seeded scallop spat survivorship
assessment of effect of spat size at deployment on survival rates
duration of growth to market size
determine impact of enhancement