It’s the iconic Australian freshwater fish, capable of growing to more than 100kg and living for decades.
The Murray cod is prized by anglers and valued by scientists as an indicator of the health of an ecosystem, and now the breeding habits of this fascinating finned creature in the Happy Valley Reservoir will go under the microscope thanks to support provided through SA Water’s 2023-24 Reservoirs Partnership Program.
The annual program supports grassroots events and projects held at South Australia’s reservoir reserves, with up to $10,000 available for each recipient.
Recfish SA Executive Officer Asher Dezsery said its project focused on educating reservoir visitors about Murray cod habitat and stock sustainability while establishing critical insights into breeding behaviour, seasonality and reproductive success.
“Murray cod, a vital recreational species and environmental indicator, pose a challenge in terms of breedi
ng within reservoirs," Mr Dezsery said.
“However, the stocked Murray cod in Happy Valley Reservoir have now reached a naturally reproducing size and condition, weighing approximately five to eight kilograms.
“We are embarking on a citizen science project aimed at involving the conservation and fishing community in monitoring the breeding success of Murray cod in reservoirs”.
Mr Dezsery said elements of the project included the introduction of breeding habitats monitored with underwater cameras capturing time-lapse videos showcasing breeding behaviour.
“This footage will help document Murray cod nesting, territorial behaviour and egg predation from introduced species like carp and redfin perch,” he said.
SA Water’s Manager of Land Catchments and Recreation Dr Brooke Swaffer said the project aimed to create a sustainable population of Murray cod through natural reproduction, laying the groundwork for the cost-effective introduction of native fish species.
“Our grassroots program is supporting projects to deliver a range of fresh initiatives that enhance visitor experience and encourage active, thriving communities by connecting people with our reservoir reserves around the state,” Dr Swaffer said.
“Family sessions fostering a connection to nature, empowering women through kayaking workshops and a ‘Walk on Water’ event are among the other successful recipients this year.”
Click here for more information on SA Water’s Reservoirs Partnership Program.
