103,978 results
Industry
PROJECT NUMBER • 2007-224
PROJECT STATUS:
COMPLETED

Seafood CRC: Increasing the profitability of Penaeus monodon farms via the use of low water exchange, microbial floc production systems at Australian Prawn Farms and at CSIRO

The economic viability of the Australian prawn farming industry is under threat from increased production of farmed prawns in south-east Asia and the substantial decrease in global prawn prices. The Australian industry is experiencing difficulty competing with imports; prawns can be landed...
ORGANISATION:
Australian Prawn Farmers Association (APFA)

Evaluating the Southern Bluefin Tuna cell lines as a platform for testing the effectiveness of antioxidants in preserving flesh quality

Project number: 2007-221
Project Status:
Completed
Budget expenditure: $353,279.00
Principal Investigator: Kathy Schuller
Organisation: Flinders University
Project start/end date: 13 Jul 2007 - 30 Jun 2010
Contact:
FRDC

Need

The vast majority of the Southern Bluefin Tuna (SBT) farmed in South Australia is sold fresh for sashimi production in Japan. Premium prices are obtained for sashimi grade tuna with a high fat content. Unfortunately, fatty fish tissues with their high polyunsaturated fatty acid (PUFA) content are prone to oxidation. This results in poor flesh quality, reduced shelf life and significant trimming of the tuna carcass at the market.

FRDC Project No. 2004/209 investigated the impact of dietary supplements on the flesh quality of farmed SBT. Specifically, it investigated the impact of the dietary antioxidants vitamins C and E and the mineral selenium. Project No. 2004/209 showed that these supplements can extend the shelf life of muscle samples taken from farmed SBT fed diets containing higher than normal concentrations of the antioxidants.

Although Project No. 2004/209 has been very successful, performing diet trials with live SBT is expensive and logistically difficult. It is also time-consuming and the statistical power of the experiments is limited by the fact that it is economically unfeasible to have multiple replicate sea-cages for each dietary treatment. As a result of these constraints, experiments must be repeated over several years to obtain statistically valid results.

Recently, we produced the world’s first SBT cell line and to our knowledge the first cell line for any tuna species. The cell line has the potential to reduce the number of experiments with live SBT and to greatly increase the number of dietary supplements that can be screened in a given period of time. With the cell line, it takes only one week to screen 24 different supplements with 3-4 replicates of each. This compares with years for similar experiments with live SBT.

This project will evaluate the cell line as a platform for testing dietary antioxidant supplements for SBT.

Objectives

1. To adapt existing assays for antioxidant potency from mammalian cell culture systems for use with primary fish cell cultures and immortal fish cell lines.
2. To use the adapted assays with primary fish cell cultures and immortal fish cell lines to screen a broad range of concentrations and combinations of traditional and novel antioxidants for their ability to inhibit lipid oxidation
3. To rank the antioxidants with respect to their antioxidant potency relative to vitamin E, the ‘industry standard’ antioxidant
4. To quantify how the antioxidant concentrations that are effective in primary fish cell cultures and immortal fish cell lines relate to the antioxidant concentrations that need to be added to aquafeeds
5. To undertake a cost benefit analysis of the various antioxidants and antioxidant combinations with respect to their eventual incorporation into feeds
6. To investigate the impact of dietary antioxidants on cellular antioxidants and antioxidant enzymes in primary fish cell cultures and immortal fish cell lines
7. To recommend the best concentrations and combinations of antioxidants to be added to southern bluefin tuna and yellowtail kingfish feeds to maximize fish health and flesh quality

Final report

ISBN: 978-0-646-54976-7
Author: Kathryn Schuller
Industry
Industry

SSA: The Next Generation (2007-2012)

Project number: 2007-203
Project Status:
Completed
Budget expenditure: $4,250,000.00
Principal Investigator: Michelle Christoe
Organisation: Seafood Services Australia Ltd
Project start/end date: 29 Jun 2007 - 1 Jul 2012
Contact:
FRDC

Need

There is a pressing national need to provide industry with services that complement and enhance those provided by peak sectoral bodies. The number and complexity of issues affecting global seafood trade will continue to increase along with the need for more rapid responses. Individual businesses and peak bodies cannot follow development in all of these areas: SSA can.

By focusing on industry development priorities and the adoption of R&D results, SSA can assist the FRDC to meet its 5 year targets and help to meet the expectations of the Australian government (see the National and Rural Research and Development Priorities and the response to the Corish Report).

FRDC investment is required to capitalize and build on SSA’s achievements and to continue to assist industry meet the challenges of sustaining seafood business profitability.

1. The need for stable supply of seafood – Australian seafood producers meet about 40 per cent of domestic demand at present, but if the status quo continues they are predicted to supply less than 25 per cent by 2020. Reducing business costs and increasing production efficiency will help close the supply/demand gap.

2. The need to sustain profitable markets – having the capacity to quickly respond to market signals and expand customer base by increasing demand for product in a broader range of markets.

3. The need to cost effectively deliver quality products to markets – collective approaches to product quality will underpin investment in branding and promotion and improve the capacity of the industry to consistently meet the expectations of premium price markets.

4. The need for access to timely and relevant expertise and knowledge – to be globally competitive Australia’s seafood businesses need access to and the capacity to use the best up to date knowledge and technology to achieve their business objectives.

Objectives

1. To develop environmental and market based processes to ensure supply through chain (Program 1: Security of supply)
2. To develop processes and systems to enable Australian seafood businesses achieve and maintain access to markets (Program 2: Security of markets)
3. To develop industry standards to differentiate Australian seafood products in key markets (Program 3: Product integrity and industry standards)
4. To provide seafood businesses with timely access to relevant knowledge and expertise to assist them to be globally competitive (Program 4: Knowledge brokerage)
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