Team effort to halt falling numbers of this once common fish.
The Southern Pygmy Perch was once a common sight in the rivers and streams of South East Australia but since European settlement, its population has dwindled.
The ‘Pygmy Perch in the Pudman’ project is now helping this attractive little fish to mount a comeback.
An amazing discovery
Until a few decades ago scientists were largely in the dark about the status of the Southern Pygmy Perch in NSW.
Then a number of populations were discovered in the tributaries of the Upper Lachlan and Upper Murray River catchments. Each one was an important find, but with such a small number of populations remaining they were still at a very high risk of extinction. That risk only increased when two populations were lost since 2006.
It was also clear that one of the remaining populations was coming under huge stress in its natural location during periods of drought – and from the recent incursion of redfin perch, an introduced species know to predate upon pygmy perch. DPI Fisheries, one of our partners in the project, rescued some of the fish for breeding with the intention of returning them once the danger had passed.
Fortunately the natural population recovered after the drought, bouncing back to healthier numbers. This gave us the opportunity to return some of the captive fish to a new site – an attempt to extend their range and protect the population against future droughts and the threats from introduced species.
The result? The perch are very happy in their new home and juvenile fish have been found in ongoing surveys. This indicates that they are not only surviving but thriving.
Along with our main partners, South East Local Land Services, DPI Fisheries and the Australian River Restoration Centre, we’ve tried to make the protection and creation of pygmy perch habitat a big local issue.
The community has been very supportive. Landholders in the area are passionate about the health of local waterways and have been keen to join the effort.
Farmers and volunteers have fenced off land to protect riparian zones and planted native tubestock – in particular understory shrubs such as Bottlebrush. Fish surveys, presentations and field days have also been extremely well attended throughout the project’s eight year history.Here are the team’s achievements in a nutshell:
- 20km of the Pudman Creek and its tributaries have been rehabilitated
- Vegetation corridors have been established, allowing fish populations to travel and grow
- A safe haven has been created for the Southern Pygmy Perch
- Species monitoring has become more detailed
- Local people have taken ownership of “their” fish
What next for Pygmy Perch in the Pudman?
To secure the long-term future of the species we urgently need to expand its range.
The successful translocation of the drought-threatened population has opened up new possibilities. Along with DPI Fisheries we’re now in the process of identifying some new sites for the Southern Pygmy Perch.
We need to continue to rehabilitate and connect habitat – particularly understory that overhangs waterways – in order to provide suitable conditions for the Pygmy Perch to expand its range. Other catchments could also benefit from a similar riparian rehabilitation program, such as the Yass Catchment. This would do even more to link remnant vegetation and previously rehabilitated sites.
All of this work needs resources, so if you think you could help please get in touch or make a donation. We’ve made a great start but there’s a lot more work to be done to save this unique little fish.