Distribution of transmitter fish in Lake Sorell between January and March 2010
The latest update on the Carp Management Program from Inland Fisheries Service reports:
Despite the Carp Management Team’s intensive efforts to prevent the remaining adult carp in Lake Sorell from spawning in late 2009, it became apparent just prior to Christmas that some carp had been successful.
Juvenile Carp were first found at the northern end of Silver Plains the week prior to Christmas. Further Sampling discovered more juveniles in the main Silver Plains drain, Robertsons, Kermodes, Duck Bay and Kemps marshes.
An intensive treatment operation was put in place to remove as many juvenile carp as possible while still inhabiting shallow vegetation areas before dispersing into deeper water.
Rotenone, a derris based fish poison, was used to kill over 14,000 fish during a 6 week period. Intensive fishing effort has since been undertaken to remove schools of juvenile fish and to gain knowledge and an understanding of this new population.
Early indications suggest that we may have already removed up to two thirds of this cohort. Lake Sorell was tracked a total of 21 times between January and March. Due to the majority of time spent catching juvenile carp tracking effort was subsequently reduced over this period.
Download the full report here [PDF 466Kb].
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