Control Corridor
For over 20 years American bullfrogs have been expanding their regional distribution south and west from Elk and Beaver Lakes. For the most part they are following valleys and creeks, streams and wetlands that connect permanent lakes and ponds.
Dispersal Over 20 Years From Elk and Beaver Lakes
A primary objective for 2005 was to define the geographic limits of the a manageable ‘control corridor’ at the southwestern perimeter of bullfrog distribution on southern Vancouver Island.
The ‘control corridor’ is a narrow region that stretches between Findlayson Arm in the north and Esquimalt Lagoon in the south. It encompasses several lakes that are suitable habitat for bullfrogs and have either already been colonized by this species or are in imminent threat of being colonized.
By effectively removing bullfrogs from within this area it is possible to contain the remaining populations within peninsular Victoria and prevent bullfrogs from becoming established in the Victoria Watershed and beyond.
Geographical Limits of the Control Corridor
