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
Macquarie perch were once abundant in their namesake, the Macquarie River, yet are now extremely threatened throughout the Murray-Darling Basin. The species is considered extinct in SA and endangered in NSW, VIC and ACT. Extinction is looming for this little fish, with only four isolated wild populations left in NSW, spanning less than a combined
Some time ago, we published an article about the fishways at the Koondrook and Cohuna weirs that were constructed in late 2021. More recently, we pondered on the development of performance standards for fishways and what a good fishway looks like. Although still in development, the researchers at Arthur Rylah Institute (ARI) have been collecting
A long time ago in a galaxy (not so) far, far away ... aliens infiltrated the ranks of many native fish populations and risked their very survival. Fish may not be an alien concept to us, however, for Australia’s native flora and fauna, alien species pose a real threat. Native fish declines are a big
The Ovens River in north-eastern Victoria is home to two large-bodied native freshwater predators: Murray cod and Trout cod. These iconic fish are top order piscivores (carnivorous animals that primarily feed on fish), helping to regulate the structure and functioning of their aquatic environments. While threatened Murray cod are highly sought after by anglers, the
Georges River Fish Habitat Restoration Project OzFish Hawkesbury-Nepean Chapter with Campbelltown Council have been undertaking Environmental DNA (eDNA) sampling in south-west Sydney on the Georges River to determine the presence of endangered species in the waterway. Local volunteers assist researchers and staff from council by collecting water samples in a coordinated approach at various locations
The first national recovery plan for the Macquarie Perch (Macquaria australasica) has now been released.…
The Goulburn Broken CMA has established a Yammer Network that aims to support collaboration amongst…
Macquarie Perch (Macquaria australasica) is a moderate-sized freshwater fish that is listed as an endangered…