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Postponed – Mighty Murray Crayfish Community Day – postponed due to high river flows

Postponed due to very high river flows. The Murray Crayfish, second largest Crayfish in the world, will be showcased in a community field day at Barham, NSW on Sunday 11 September. All are welcome to attend and learn about the biology and ecology, past research,...

Murray Crayfish get out and about in cold weather as NGT conducts annual monitoring

With the temperature dropping and the first frosts felt across south-eastern Australia, the Murray Crayfish (Euastacus armatus), second largest freshwater crayfish in the world, becomes more active. NGT has been involved in the conservation of this species for many years, including leading a genetic study...

One step closer to re-establishing a keystone species, Murray Crayfish, in South Australia

Did you know that the second largest freshwater crayfish in the world, the Murray Crayfish (Euastacus armatus), was once widespread and abundant in the Murray River in South Australia? However, following population loss attributed to habitat degradation such as the regulation of flows and water...

Murray Crayfish Part 1: Tracking recovery of populations impacted by blackwater disturbance

Over the past four years, we have continued monitoring populations in the Murray River that had suffered significant (80% decline) population loss due to the 2010‒11 extreme blackwater event. Over that time, we have only observed a gradual increase in the abundance of affected populations,...

Murray Crayfish Part 3: Status assessment of Victorian recreational fishery

With the impacts (and fishing closures) occurring in New South Wales, Victoria now maintains the geographically largest recreational fishery for the species. With this in mind, it is timely that we have just finalised the most comprehensive assessment of the Victorian recreational fishery in Victoria ever...

Murray Crayfish Part 4: They’re not in SA, but they could be… the search continues in the Lower Murray

After four years of searching, which included over 7700 net hours (number of nets per site times by the number of hours each net was set for – that’s also 321 net days), at almost 30 sites we have failed to detect a single Murray crayfish...

Insight into genetic status of Murray crayfish

Freshwater crayfish are poor dispersers – predominately moving by crawling across the bottom of rivers and creeks – so it is hard to imagine that individuals, separated by over 2000kms of waterways, can be genetically similar and form part of a single interbreeding grouping. These findings were revealed in our Murray crayfish population genetics study, based on 20 locations across the present range of species, recently published in Marine and Freshwater Research (here).

Murray crayfish presentations at the Fisheries Victoria fisher forums

Last week, we attended Fisheries Victoria fisher forums at Wodonga and Nagambie, which are part of a series of forums held across the state to get input from recreational fishers and provide an update of recent Fisheries Victoria activities. Aquasave – NGT’s own Sylvia Zukowski was invited to...