Stuart (2012) N/A Carp management in the Potential risks and Operational control methods recommended: Edward–Wakool region benefits for native bio-manipulation (recovery of native system is: flora and fauna predatory fish via the synchronisation of (~500 operational (e.g. flow Conceptual model flow spikes in known spawning periods) 1000 management) of Carp life history reduce frequency of blackwater events square in the rate of recession (floodplain draining of kilometres and/or system between the Carp breeding areas to expose and kill intervention-based Identification of eggs) Murray and (e.g. Williams’ Carp key knowledge Edward rivers) rate of recession (draining of wetlands separation cages on gaps associated and floodplains to strand and kill fishways and with Carp Carp). regulators). management specifically for the Intervention control methods recommended: The three major Edward–Wakool objectives are to: electrofishing removal area (e.g. minimise cage trapping in regulators identifying Carp opportunities for Judas Carp tracking programs spawning habitats spring/summer and netting key Carp habitats and floodplain spawning timing/location of aggregations (commercial fishing by adult Carp Carp aggregations) techniques) (intervention/ operational) screens on wetlands exclusion barriers (e.g. sonic and electrical maximise flowing water habitats, which barriers, bubble curtains) are preferred by chemical poisoning (e.g. rotenone) native fish diseases (operational), and molecular and biological control (e.g. minimise damage by Carp technology, lethal ‘daughterless’ Carp on sterile offspring). riverine/wetland values (intervention/ operational).
Stuart (2012) system (~500 1000 square kilometres between the Murray and Edward rivers) N/A Carp management in the Edward–Wakool region is: operational (e.g. flow management) and/or intervention-based (e.g. Williams’ Carp separation cages on fishways and regulators). The three major objectives are to: minimise opportunities for spring/summer floodplain spawning by adult Carp (intervention/ operational) maximise flowing water habitats, which are preferred by native fish (operational), and minimise damage by Carp on riverine/wetland values (intervention/ operational). Potential risks and benefits for native flora and fauna Conceptual model of Carp life history in the system Identification of key knowledge gaps associated with Carp management specifically for the Edward–Wakool area (e.g. identifying Carp spawning habitats and timing/location of Carp aggregations) Operational control methods recommended: bio-manipulation (recovery of native predatory fish via the synchronisation of flow spikes in known spawning periods) reduce frequency of blackwater events rate of recession (floodplain draining of Carp breeding areas to expose and kill eggs) rate of recession (draining of wetlands and floodplains to strand and kill Carp). Intervention control methods recommended: electrofishing removal cage trapping in regulators Judas Carp tracking programs netting key Carp habitats and aggregations (commercial fishing techniques) screens on wetlands exclusion barriers (e.g. sonic and electrical barriers, bubble curtains) chemical poisoning (e.g. rotenone) diseases molecular and biological control (e.g. ‘daughterless’ Carp technology, lethal sterile offspring).
ARI-Technical-Report-255-Managing-flows-and-carp.docx