Freshwater fish attracting structures (FAS): Evaluating a new tool to improve fishing quality and access to fisheries resources in Australian impoundments
Improving survival and quality of crabs and lobsters in transportation from first point of sale to market.
Industry producers and processors have identified that crabs and lobsters suffer quality deterioration
during transportation, which then results in downgrading and consequent price reduction. As lobsters and crabs are highly sought products, losses incurred through current handling chains cause significant waste of this valuable resource. In NSW eastern rock lobster, mud crab and spanner crab resources are fully fished and hence, full revenue return can only be gained by mitigating the wastage occurring.
It is known that quality loss in crustaceans is often caused by stress imposed along the supply chain. To reduce the likelihood of downgrading of product, there is a need to undertake an examination of the handling and transport issues pertinent to various landing ports, distribution chains and market sales points. Identification of specific stress factors and where they occur most severely will enable development of specific mitigation measures for Industry implementation.
The need for the research was noted in the NSW FRAC research priorities, 2016.
Final report
Development of post-harvest handling technologies for the under-utilised cross-jurisdictional Royal Red Prawn fishery
Informing inter-jurisdictional snapper management in eastern Australia
In the recent “Status of Key Australian Fish Stocks Reports 2012” the status of snapper on the east coast was not defined because the stock was given a different status in each jurisdiction based on different assessment approaches and criteria for defining status. The need for a single, robust, consensus approach was identified as a priority in a FRDC funded national workshop on snapper held at SARDI in March 2013. In particular it was noted that, underpinning a unified approach to assessment and management, there is a need for: a better understanding of stock structure, a better understanding of the utility of fishery independent data sources, and better engagement with stakeholders. The project explicitly addresses a key Program 2 – Industry Priority identified as relevant to the FRABs in Queensland, NSW and Victoria. The systems and approaches developed as a result of this research will serve as a model in other fisheries where different jurisdictions share a common stock but lack a consistent assessment and management decision making framework.
Article
Snapper has been fished since the early development of the colony around Sydney Harbour in the late 18th century, but it was the arrival of steam power in the 1860’s that enabled fishers to start regularly targeting the abundant schools of snapper occurring in the deep-water fishing grounds outside of the sheltered bays and estuaries along the east coast of Australia. This article covers some of the history.
Project products
Estimating the impacts of management changes on bycatch reduction and sustainability of high-risk bycatch species in the Queensland East Coast Otter Trawl Fishery
This project addresses aspects of Priority 8 of the Environment Program as outlined in the FRDC’s 2015 Competitive Round Call for Expressions of Interest. Specifically, the project will measure the improvement in bycatch reduction that has occurred in the Queensland East Coast Otter Trawl Fishery and how these reductions have been achieved. Effort has decreased over time and BRDs and TEDs were mandated in the QECOTF in the early 2000’s. These and other management changes have likely led to significant decreases in the amount of bycatch generated by the QECOTF. There is a need, therefore, to quantify this decrease and extend the results to stakeholders. Further, through these results, the trawl industry is better able to demonstrate that its impact on bycatch species has significantly decreased over time, with resultant positive outcomes regarding the ecological impact of the fishery. These results will contribute directly to the assessment of the fishery for the Great Barrier Reef Outlook Report process and World Trade Organisation’s (WTO) approval process.
Despite improvements in bycatch management, the sustainability of trawl bycatch species remains a significant issue for some stakeholders and the community. For example, sharks and rays exhibit low fecundity and, due to their biology, are susceptible to capture by trawls, resulting in concerns regarding their sustainability - the impact of trawling on high risk species including skates and rays was recently highlighted by an Ecological Risk Assessment conducted by the Great Barrier Reef Marine Park Authority. Goals of fisheries management include maintaining ecosystem structure, conserving biodiversity and supporting sustainable fisheries. This applies to both target and bycatch species. To achieve the key management goals for bycatch, it is essential to estimate the fishing-induced mortality of bycatch species, particularly those identified as being at significant risk, and ensure this impact is within the species’ intrinsic capability to withstand. This project will contribute to the sustainability for bycatch species with particular focus on potentially high risk species identified in previous research.
Final report
Commercialising the production of Cobia in Australia
There is a need to build on the work conducted under the auspices of the Seafood CRC and address the issues that have arisen in commercialising cobia. A number of unforeseen circumstances, in both seed supply and grow-out of cobia, arose during the Seafood CRC project,that limited the commercial development of this species.
Cobia is typically regarded as a gonochoristic species. However, a relatively high incidence of intersex individuals in captive-reared broodstock populations has occurred in recent years. This appears to have reduced reproductive output and therefore the regularity and quantity of seed supply. The mechanism behind the intersex individuals, early identification of the anomaly and the potential impact on reproductive output
and commercial hatchery production warrant further investigation. There is a need to capture and maintain wild cobia to provide contingency for the occurrence of reproductive abnormalities in captive-reared fish and to facilitate comparative developmental trials. There may also be a need to provide wild fish for the
development of a broodstock facility at PRF’s hatchery.
PRF has faced a number of challenges in commercialising cobia production. Predation and fish health have had major impacts on productivity over earlier production seasons. Whilst a number of innovative techniques have been implemented to reduce these impacts, there remains a need to improve and refine these further
There are currently no commercial hatcheries producing cobia; as such there remains a need for support from DAFF to supply juvenile fish for on-growing. Small-scale hatchery production at PRF was successful in producing juvenile cobia; however, there is a need to increase this to a commercial scale over the course of this project. DAFF will also supply larvae to continue the development of hatchery capability at PRF and to support PRF’s anticipated development of broodstock holding and maturation facilities.
Final report
This project is a collaboration between the Department of Agriculture and Fisheries (DAF) and the Cobia aquaculture sector, predominantly Pacific Reef Fisheries (PRF). It was undertaken to consolidate the aquaculture in Australia of Cobia, a species offering considerable potential as a diversification option for pond-based culture activities in Queensland. The project addressed key elements of the production cycle in order to move industry towards a more commercial footing and advance both the scientific knowledge and human capabilities of the sector. The project involved DAF staff at the Department’s Bribie Island Research Centre (BIRC) and staff from the PRF farm in Ayr, North Queensland. From 2014-2017, research examined: health issues affecting Cobia in culture both in the hatchery and on-farm; the emerging issue of intersex in Cobia and potential for this to further impact production; capability development of PRF staff in preparation of the establishment of a commercial Cobia hatchery; and, the involvement of some new entrants to Cobia aquaculture utilising tank-based production systems.
The supply of a total of 59,700 fingerlings (26,300 in 2014/15; 18,100 in 2105/16 and 15,300 in 2016/17) enabled industry collaborators to maintain production at 100 T per annum, sufficient to continue to supply the market which has been developed over several years. Losses incurred during one contracted fish transportation event, highlighted the risks associated with this activity. This was successfully addressed in two later transportation activities by adapting PRF’s own prawn transport system.
Health management continues to be a key activity on-farm, with parasites identified as a significant and ongoing difficulty. In the hatchery, catastrophic losses of larvae were diagnosed due to epitheliocystis, caused by chlamydia-like intracellular bacteria. Molecular testing however confirmed that the bacteria was not in the order Chlamydiales, unlike several other species causing epitheliocystis in fish. Management of the infection by oxytetracycline was demonstrated and this remains an effective means of control.
Intersex frequency was negligible in the cohort examined and these individuals demonstrated significantly different growth and reproductive development to intersex animals. Females grew larger than males and animals underwent normal maturation and were successfully spawned. Intersex was found to occur at negligible levels in this cohort (<1%), and sexually dimorphic growth was shown. Incidence of 0.5% was confirmed by destructive and non-destructive gonadal examinations. Growth rates were also followed and compared to cohorts known to have significant levels of intersex individuals. Animals were followed to maturity and gonadal development assessed using examination of gonadal biopsy samples. Individuals were also raised to maturity and induced to spawn with fecundity and fertilisation rates assessed.
The study has continued to demonstrate the viability of Cobia as a diversification options for prawn farms, particularly in North Queensland. While the commercial success of tank-based Cobia aquaculture is yet to be demonstrated, continued interest in this species is encouraging, particularly in relation to a potential role for Cobia as a diversification option for prawn farms in the Logan region, following the outbreak of white spot disease in 2016. The development of this sector of the industry may well occur in conjunction with new products being brought to market, potentially broadening options for industry and consumers. In providing prawn farms with diversification and therefore greater economic stability the project is contributing towards rural and remote business resilience and economic opportunities.
Building precision into the Australian Industry Live Mud Crab Grading Scheme (AILMCGS) through addressing grading and regional anomalies
Variability’s and inconsistencies in the application of the thumb pressure grading technique and regional and seasonal anomalies have led to some discontent with the Australian Industry Live Mud Crab Grading Scheme (AILMCGS).
The AILMCGS provides a range of physical attributes, along with a subjective assessment of shell-hardness to provide consistency in live mud crab grading on a national scale. Consistent grading gives buyers and consumers a product that defines price paid. Concerns have been raised that incorrect application of the scheme can be used to manipulate price at various stages of the supply chain.
Due to variables of lifecycle, seasonality, regionality, habitat, individual grader and grading techniques, it can never be a 100% guarantee of meat content associated with the given grade.
It is implicit to the scheme to apply pressure in a precise and readily reproducible way to minimise variations and damage to and loss of product. There has long been a widespread call from industry, including from members that are both satisfied and disgruntled with the current scheme, to have an objective method to determine crab quality. This relies on clear and precise testing protocols. The realities of the operation of this industry are that the use of hand testing is the ‘tool’ of choice and practicality at this stage.
Developing a science-supported assessment technique will standardise grading and allow for any seasonal and/or regional anomalies to be addressed. Ultimately, there is a need for a cost effective, practical on-board objective tool to provide assured grading standards.
Final report
Seafood CRC: implementing Australian Quality Index schemes in three supply chains
Seafood CRC research (2009/727) has shown that there is significant potential for increased product storage life through supply chain management improvements. In one major supply chain (MG Kailis) it has been demonstrated that savings of $150,000pa ongoing can be achieved through implementation of relatively simple improvements. In that study, the QI method was introduced to the company and the QI manual is now used at various points in their supply chain to assist supply chain monitoring. However, to date there has been very little broader uptake of QI schemes within the Australian Industry, despite efforts (including commissioning SeaNet, FRDC 2010-305) to commercialise and raise awareness of the benefits of using QI.
With proposed investment by the Sydney Fish Market, De Costi Seafoods and MG Kailis for improving their supply management processes to achieve increased product storage life, the timing is now right to work with these companies to introduce the QI method and assess how to better meet their operational needs. This will be most effective where the QI tool is in a readily-useable format. A criticism of the current hardcopy manual format is that they are cumbersome and difficult to use in the varied supply chain environments. However, the manuals are still highly valuable as a QA management document and it is intended to maintain these in the short to medium term.
The Seafood CRC has the opportunity to build on the prototype ‘app’ platform developed by the Sydney Fish Market and create a more useful QI tool format for the entire Australian seafood industry. Working initially with three supply chains will generate traction within the wider industry with the goal of mirroring the outcome of European success of widespread adoption of QI methods within their supply chains.
Final report
This project has raised awareness within targeted seafood supply chains of QI methodology and the advantages of use within quality assurance systems.
Initial focus centred on updating the existing Australian Quality Index Manual with all schemes developed for Australian fish species. Over two hundred hardcopy QI Manuals have been distributed to appropriate seafood businesses. The QI Manual provides a comprehensive resource for information on the QI technique, how to use it for quality assurance assessment and includes QI scoring templates, along with visual depiction of ice day storage correlated to QI score attained. Industry comment on the usefulness of the QI Manual recognised the value of a QA system formalised with background science, along with the benefit for audit purposes and the benefit of common language between industry participants.
The project’s main goal was to provide QI method in a format that was most readily applicable in any environment at any point along the supply chain. To achieve this, an Australian Seafood Quality Index App (ASQI App) was created suitable for use on multiple devices.