Carp is a major feral pest in Australia. Development of control options has consistently been identified as a high priority research item. When carp were identified in Lakes Crescent (2365 ha) and Sorell (4770 ha) in 1995, the Inland Fisheries Service (IFS) decided to eradicate – both populations. These represent the only extant carp populations in Tasmania and threaten the State’s premier trout fishery that attracts 30,000 anglers per year. The presence of an endemic galaxiid in Lakes Crescent and Sorell prevented the use of poisons; draining the lakes was not possible; and the IFS decided on a campaign of containment, and eradication through fishing.
A daily mark and recapture model was developed and used to estimate the current population size. The model can be generalised to other lakes. An associated database was developed to reduce errors in data recording and transcription. Analysis of catch and effort data and the data on carp tagged and recaptured multiple times has shown the variability of behaviours in the carp populations that has important implications for the ongoing eradication. Observations on the effectiveness of different approaches to carp eradication have been documented to assist other groups considering eradicating carp through fishing.
|Author||Diggle, J., Day, J., and Bax, N.|
|Publisher||Inland Fisheries Service|
|ISBN/ISSN||0 646 435 99 X|