RIEL seminar series
Black jewfish: drivers of productivity in a changing environment
Presenter | Dr Joanne Randall | |
---|---|---|
Date |
|
|
Time |
to
|
|
Contact person |
RIEL outreach
|
|
Location |
CDU Casuarina campus, Yellow 1.1.39 and Zoom If you wish to attend this seminar via Zoom please email riel.outreach@cdu.edu.au for a link |
|
Open to | Public |
The Black jewfish is a large-bodied Sciaenid that is a key focus of commercial, recreational and Indigenous fishing effort in the Northern Territory. The species has been heavily overfished across its tropical Indo-West Pacific distribution with northern Australia remaining one of the last strongholds. Despite a range of regulatory controls, the species was listed as “Overfished” in the Northern Territory in 2016. Increases in catches in 2017/18 after several poor years were inconsistent with the forecasts based on stock reduction analyses, demonstrating a need for a better understanding of the drivers of fishery productivity. Freshwater outflow in the NT is characterised by high seasonal and interannual variation. As such, understanding the effect of outflows on the condition and physiology of coastal fish species is important for predicting how the fishery will respond to harvest pressure and climatic change. Here I present results of a two-year study which addressed critical knowledge gaps regarding Black jewfish populations and how the physiology of fish changes in response to environmental variability.
This FRDC-funded project is a collaboration among the Research Institute for the Environment and Livelihoods (Charles Darwin University), Australian Institute of Marine Science and the Northern Territory Department of Primary Industry and Resources, working with commercial fishers and the recreational sector.
Dr Jo Randall is a post-doctoral researcher in the Research Institute for the Environment and Livelihoods currently investigating population dynamics and community structure in Black jewfish. Jo has a research background in coastal ecology, macroalgal physiology, underwater acoustics and fisheries and aquaculture both within Australia and overseas.
Related Events
Hidden emissions
Read more about Hidden emissionsIn this seminar, Clément will present results from a new database of greenhouse gas (GHG) concentrations and fluxes in tropical freshwater systems. He will highlight the extreme variability in GHG concentrations and fluxes across the tropics, and the role of small streams, ponds and riparian wetlands as globally significant hotspots of GHG emissions.
'Calling the wind': Blue whales, climate and whale tourism in Timor-Leste
Read more about 'Calling the wind': Blue whales, climate and whale tourism in Timor-LestePrevious studies have identified the major economic potential for whale watching in the developing nation of Timor-Leste. In this seminar, Karen will outline efforts in developing a whale and dolphin ecotourism industry
Marine megafauna research across the remotest sea country in the NT
Read more about Marine megafauna research across the remotest sea country in the NTNatalie and Carol will discuss the Australian Research Council funded Marine Megafauna Project, which focuses on sea country partnerships with eight Indigenous Ranger groups across the Top End of the Northern Territory (NT). The project encompasses work on sea turtles, dolphins and whales.