Opportunities and impacts of range extending scalefish species: understanding population dynamics, ecosystem impacts and management needs
Species-level responses to ocean warming is a priority research area as they underpin the structure and function of marine ecosystems and the productivity of fisheries that operate within them.
There are a number of range extending species that have become increasingly abundant in Tasmanian waters, providing new fishing opportunities for recreational and, to a lesser extent, commercial fishers. Species in this group include Pink Snapper, King George Whiting and Yellowtail Kingfish. While King George Whiting are known to spawn off the north coast it is unclear as to whether the other species have or are likely to become established as self-sustaining populations in Tasmanian waters or simply persist as spill-over from populations that are centered off mainland Australia. If the former is the case, it will be especially important to consider population attributes such as growth, mortality and reproductive dynamics relevant to the Tasmanian populations when developing and refining management arrangements to maximise the opportunities these 'new' species bring.
In addition, the broader ecosystem impacts of such range extending species, including competition with resident species at similar trophic levels, are unknown but could have consequences for other recreationally and commercially important species. Understanding these relationships will have benefits for the assessment and management of the Tasmanian recreational fishery more generally.
Final report
This work set out to quantify the biology and diet of three key range-shifting species in Tasmania with both recreational and commercial fishery value. The project was heavily reliant on engagement from the recreational fishing community and multiple citizen science initiatives, as well as historical data.
The information collected was used in modelling to predict how suitable habitats for each species may shift under future climate change projections. The work also indicated the potential changes to the ecosystem (such as food web) if these species’ ranges were to move.
Market study to assist target seafood marketing campaign to restore consumer confidence after Hunter River fishing closure due to contamination
Practicing aquatic animal welfare: Identifying and mitigating obstacles to uptake and adoption by the Australian Fishing Industry
Recent research shows general public support for Australia’s fishing industry (Sparks 2017; Voyer et al 2016) that depends on people’s assessments of industry’s commitment to implement best practice and demonstration of being effective environmental stewards (Mazur et al 2014). The FRDC has recognised external pressure for the fishing industry to move beyond compliance with environmental and other regulations and improve its performance in key areas, including animal welfare. As noted above, the FRDC has provided support for a range of research and industry initiatives to achieve positive aquatic animal welfare outcomes. The FRDC also recognises that further improvement to the seafood industry’s aquatic animal welfare practices are required.
Recent FRDC project investments has produced valuable knowledge about how when change is called for it is very important to recognise that multiple factors influence – positively and/or negatively - people’s decisions to take up those new, innovative, and/or different practices (i.e. 2017-133, 2017-046, 2017-221). These factors typically include personal values and belief systems, access to different kinds of resources required to make changes, particular features of the recommended practices, as well as a range of macro-levels factors that while they may be outside of people’s direct control still affect their choices. FRDC Project 2017-133 generated important insights about how and to what extent these kinds of factors have been keeping the seafood industry from making more substantive progress towards building greater stakeholder and community trust (Mazur & Brooks 2018).
Further work of this nature is now needed to shed greater light on aquatic animal welfare in the seafood industry (FRDC 2017-221). In particular the research should be focused on identifying the particular features of ‘best care’ for aquatic animals, the range of factors that may be obstructing industry members’ use of those practices, and examples of recent (extension) initiatives used to encourage better aquatic animal welfare.
Final report
A mixed-method approach was used to collect data and information for this research. These included a desk-top review, stakeholder consultation, and a set of interviews.
This Project identified a range of AAW practices used by some seafood producers that they believed to be ‘humane’. The Project also identified some factors enabling and impeding seafood producers’ approaches. Key factors supporting AAW uptake and adoption included a seafood producers’ openness to change and interest in learning, the relative advantages of using recommended practices, well designed and resourced extension, and positive relationships across industry, government and interest group networks.
This Project provides highly useful insights about AAW practices used by a small sample of Australian seafood industry members, which were primarily representatives of the wild-catch commercial fishing sector with two from the finfish aquaculture sector. This project’s findings support results from other recent Australian seafood industry research and policy initiatives, which have found that more appropriately designed and consistently-funded extension programs can help improve AAW uptake and adoption. However, AAW is a complex issue, and requires more than just extension. A range of carefully conceived and integrated policy instruments (e.g., market instruments, regulations) are needed to achieve substantive and lasting AAW practice change. Five recommendations have been formulated to help amplify enablers of and mitigate obstacles to AAW uptake and adoption. Suggested next steps include a workshop to draw out policy and industry-led options to enhance adoption, including feasibility of a risk assessment; and a case studies to test risk assessment and options to improve adoption.