World Fisheries Congress 2020 - Sharing our Oceans and Rivers: a 2020 vision for the world’s fisheries
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.
National interactive edu-tainment program exploring sustainable production and consumption
Improving demonstrated environmental accountability in the Northern Territory fishing industry
During the past three years there has been an increasing interest in and understanding among licensee Associations of the role that environmental performance is playing in the future viability of wild catch fisheries in the Northern Territory.
There are now 8 Associations/Licencee Groups that want to develop Codes of Practice for their fisheries and at least 3 wish to progress to full environmental management systems at this stage, with more considering this.
With the predominantly negative media coverage of the fishing industry in the Northern Territory, the realization of these initiatives by industry will go a significant way towards changing its image within major sections of the community. At the same time, it will facilitate industry’s wish to ensure that it continues to sustainably harvest product as the industry further develops. The initiatives are in line with the strategic management directions of the NT Government.
The difficulty facing industry is that the Seafood Council, which administers all the Associations, does not have the staff to adequately assist these developments. The Seafood Council strongly believes that the relatively small investments over two years to fund a dedicated person to drive the developments at a detailed practical level will pay dividends worth many times the investments for industry, the Northern Territory community and the aquatic resources and ecosystems in waters adjacent to the Northern Territory.