Fish Movement and Migration

Fish screens can be a useful tool for irrigators and lifesavers for fish — without fish screens over irrigation pumps, debris and wildlife can be sucked up into pipes that draw water from rivers. This causes fish and other creatures to become trapped and die, which in turn partially or fully blocks the pipes, forcing
Epizootic haematopoietic necrosis virus (EHNV) is a lethal virus that infects fish through the body surface or gastrointestinal tract. Once in the host, it multiplies in the blood forming organs such as the spleen and kidney and destroys them in the process, ultimately killing the fish. EHNV is only present in Australia, endemic to catchments
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
In response to the fragmentation of rivers and streams, fishways have become a popular method of mitigating the impacts of dams and weirs by helping to; facilitate fish movement and migration and create access to habitats. Habitat fragmentation poses a great risk to biodiversity, with riverine fish species particularly vulnerable to human development. Fishways, also
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