Sea Hardening Pacific Oyster Spat

About the research project

Pacific oyster spat are frequently transferred from hatcheries to sea-based environments for grow-out. Insufficient physiological and environmental conditioning prior can result in elevated mortality and suboptimal performance. Yet, nuances in hatchery techniques for producing optimally performing spat and its effect on grow-out remain unclear. Sea-hardened spat will improve production output and sustainability of offshore oyster farming, contributing to a resilient local industry. This project aims to investigate the biological and operational factors that influence the quality of hatchery produced spat at the time of deployment. Specifically, we will examine the effects of hatchery-based treatments such as dry-out exposure, wash frequency, feed type and ration, culture system, genetic line, and release size on the robustness and survival of spat.

Ensuring spat are adequately prepared prior to transfer is critical for improving survival, enhancing farm efficiency, and reducing early-stage production losses. This project will generate practical, science-based strategies to improve grow-out performance and industry profitability. The outcomes will be of direct benefit to oyster producers and contribute to national and global efforts in sustainable aquaculture.

The objectives of the project are to:

• Identify spat conditioning treatments that optimise survival and growth post-deployment.
• Quantify stress responses and performance metrics such as shell growth, survival, metabolic rate, and condition index.
• Evaluate the commercial relevance and scalability of hatchery interventions in industry settings.
• Work collaboratively with industry partners to validate findings under commercial farming conditions.
• Investigate the physiological mechanisms underpinning improved resilience in conditioned spat.
• Assess the interactions between hatchery treatments and environmental variables in the field.
• Develop a decision-support framework for hatchery managers based on research outcomes.

Alternate location

The project includes periodic fieldwork at commercial oyster hatcheries and farms across Tasmania, accounting for approximately 20% of the candidate's time. The remainder of the research will be conducted at IMAS Taroona, ensuring access to supervision, resources, and facilities. UTAS supervision will be maintained throughout, and the arrangement complies with international student visa requirements.

Primary supervisor

Meet Associate Professor Andrew Trotter

Funding

Applicants will be considered for a Research Training Program (RTP) scholarship or Tasmania Graduate Research Scholarship (TGRS) which, if successful, provides:

• a living allowance stipend funded by University of Tasmania of $34,315 per annum for 3.5 years
• a relocation allowance of up to $2,000
• a tuition fees offset covering the cost of tuition fees for up to four years (domestic applicants only)

A tuition fee offset may be offered to eligible international applicants following competitive assessment 

As part of the application process you may indicate if you do not wish to be considered for scholarship funding.

Other funding opportunities and fees

For further information regarding other scholarships on offer, and the various fees for undertaking a research degree, please visit our Scholarships and fees on research degrees page.

Eligibility

Applicants should review the Higher Degree by Research minimum entry requirements.

Ensure your eligibility for the scholarship round by referring to our Key Dates.

Additional eligibility criteria specific to this project/scholarship:

• Applicants must be able to undertake the project on-campus

Selection criteria

The project is competitively assessed and awarded. Selection is based on academic merit and suitability to the project as determined by the College.

Additional essential selection criteria specific to this project:

• Applicants should hold a strong academic record (e.g., BSc Hons, MSc, or equivalent) in aquaculture, marine biology, ecology, zoology, or a related field.
• Applicants must demonstrate research capability through a thesis, publication record, or equivalent research experience.
• A willingness to participate in regular fieldwork at oyster farms across Tasmania, including under variable weather conditions, is essential.

Additional desirable selection criteria specific to this project:

• Previous research experience in aquaculture, especially in industry environments, is highly desirable.
• Skills or training in nutrition, environmental physiology, or water quality monitoring are advantageous.
• A demonstrated interest in applied marine science, aquaculture innovation, or sustainable seafood production will be viewed favorably, as will a commitment to developing a long-term career in aquaculture or marine ecological research.

Application process

1. Select your project, and check that you meet the eligibility and selection criteria, including citizenship;
2. Contact Associate Professor Andrew Trotter to discuss your suitability and the project's requirements; and
3. In your application:
   • Copy and paste the title of the project from this advertisement into your application. If you don’t correctly do this your application may be rejected.
   • Submit a signed supervisory support form, a CV including contact details of 2 referees and your project research proposal.
4. Apply prior to 1 October 2026.

Full details of the application process can be found under the ' How to apply ' section of the Research Degrees website.

Following the closing date applications will be assessed within the College. Applicants should expect to receive notification of the outcome by email by the advertised outcome date.

Apply nowExplore other projects