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Golden perch

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Within the Murray Darling Basin (MDB), experts have estimated a decline in native fish abundance of ~90% since European settlement. Things such as changes to the hydrological regime, habitat degradation, river regulation and infrastructure, over-fishing, and impacts from alien species are all contributing to the ongoing decline (Koehn and Lintermans 2012; Lintermans 2013). Ongoing monitoring
From the mighty Murray cod to the beloved Golden perch, some of our favourite native species have enjoyed the benefits of learnings gathered from the Flow Monitoring, Evaluation and Research program (Flow-MER). The program uses research to investigate how water for the environment can be used to enhance specific parts or processes of the fish
Hume Dam photographed from above on a bright sunny day, with a small flow visible.
‘Flow hydrodynamics’, ‘turbulent kinetic energy’, ‘rheotactic behaviour’ - whilst these terms might not mean much to you, they are essential parts of native fish migration in the Murray-Darling Basin.    The Murray-Darling Basin is one of the most regulated river systems in the world, home to over 10,000 barriers preventing fish from migrating. These barriers
An aerial photograph of Lake Eildon Spillway on an overcast day.
Native fish in Australia are hardy, having adapted over millennia to live in one of the driest continents on Earth. However, research shows that even the hardiest of native fish species aren’t immune to the effects of human changes to natural environments. River regulation, in particular, alters aquatic ecosystems significantly, changing the natural environment and
Microplastics are a global problem, infiltrating all levels of food systems and ecosystems. Now a multi-level governance issue, reaching across international, national and local scales, microplastics are most known for their impact on oceanic ecosystems, however, freshwater ecosystems are equally significantly impacted by plastics. Microplastics have been noticeably less researched in freshwater ecosystems compared to
Like many other important native freshwater fish species within the Murray Darling Basin, Golden perch (Macquaria ambigua) were immensely impacted by the 2018-19 fish kills in the lower Darling River.  A 2021 study involving 18 researchers (by Zampatti et.al) looked into the species’ historical and current population demographics in the Darling River. The study provided guidance on how best to manage our
In order to recover native fish populations, the Australian Government invests a significant number of resources, particularly regarding environmental water. In order to guide this investment, it is crucial to understand how and why fish populations vary. Although there is a considerable amount known about how different characteristics of populations impact population growth, less is