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Wimmera CMA

Street Address:
24 Darlot Street, Horsham, 3400
(enter via Gleed St)

Postal Address:
PO Box 479, Horsham, VIC, 3402
Phone: (03) 5382 1544
Fax: (03) 5382 6076
Office Hours:
Monday to Friday, 8:30 - 5:00pm
(excluding Public Holidays and Christmas - New Year Closure.  Office may also be closed for short periods Monday mornings)


Researchers revisit carp hot spots

Aug 30, 2018
Carp Found Lake Marma Surveyors removed a large number
of carp from Lake Marma
Small Catfish Found at Lake Marma Researchers also found a high abundance
of small Freshwater Catfish in Lake Marma

Researchers are revisiting a dozen Wimmera carp hot spots that are the target of carp removal work to track the success of the program and guide future carp control.

Results so far have found the pest is retaining a stronghold in Lake Marma but less so in Warracknabeal and Brim weir pools.

Wimmera CMA is tracking the success of its carp removal work from the past two years with follow-up surveys across the region including the Wimmera River near Jeparit, Mt William Creek and Wal Wal Swamp.

The CMA’s removal program aims to improve conditions for native fish and obtain more data on carp numbers and sizes. This will inform future carp control actions such as the potential release of the carp herpes virus.

Wimmera CMA water planning and policy officer Greg Fletcher said last week’s survey results from the Yarriambiack sites were mixed.

“Lake Marma in Murtoa has a very large carp population compared to the weir pools and other locations around the region. On the flipside, the surveys found good numbers of Freshwater Catfish in the lake.”

Dr Dion Iervasi from Austral Research and Consulting is doing the survey work with an electrofishing boat which uses an electrical current to temporarily stun fish so they can be removed by nets. He is also trialling a multi-beam side-scanning sonar to more effectively spot fish under the water.

Greg said results also indicated that carp removal works had been effective in reducing the carp population in Brim Weir Pool.

“Results show numbers are reducing over time and still remain quite low a year on from the last surveys. Dion also discovered large Freshwater Catfish and Golden Perch in Brim Weir Pool. He has returned the native fish safely to the water to hopefully be caught by more traditional techniques in the future.”

Carp have been a menace in the Wimmera’s waterways for decades with their feeding behaviour muddying waters and threatening other species.