The graph below shows rat levels before and after aerial 1080 operations that took place between 2012 and 2017. It shows results from a range of predator control operations. Knowledge gained from these results has been used to improve our current programme.
Rat monitoring results for 2012 - 2017
Graph showing rat monitoring data from 2012 to 2017 | View larger (PNG, 106K)
The percentages are the rat tracking indices (proportion of tunnels showing rat tracking), which reflect relative rat abundance. Where the post-operation result is blank, a zero or undetectable rat tracking result was achieved.
While rodents will reinvade from surrounding areas, rat numbers will generally stay low in the beech forest until the next forest mast or seeding.