"I'm not really familiar with that part of the country, so don't know the terrain, but our first question around predator control would be whether or not it is physically practical to control predators to sufficiently low levels using ground-based techniques. If it is physically possible but significantly more expensive than aerial 1080 to use ground-based, it still may be possible to use ground-based if, for example, local people are prepared to contribute some volunteer labour"...Kevin Hague 27 April 2011.
I would have thought that the first question, Kevin, would be whether there is any method available right now that enables us to rid a large area of pests forever or at least for the long term?
We have just had a post from Anne about the stunning success of the Waitutu Forest 1080 pest control programme over 25,000ha of this vast, inaccessible Southern Fiordland National Park and World Heritage Site Forest and how kakas are now breeding here like rabbits!
Southlanders involved in implementing this very successful Waitutu 1080 programme have recently told me that they were themselves astounded by its success. For decades they also had focused on all the issues that totally confuse the Green Party on 1080 and lead to its fuzzy thinking on pest contol.
Many Southlanders originally wanted pest control in these remote and wonderful forests to be more about job creation rather than about achieving effective pest control on a big scale. An analogy is that we could generate lots of jobs for Kiwis by using picks and shovels rather than bulldozers to build roads or move earth. We don't because it is dumb, wastes human talent, wastes money and doesn't do an effective job.
Then they discovered in Southland that there are few people who actually want to do futile and tough ground based pest control work in remote places for the long term.
Those Southlanders concerned about pests also wanted to please as many people as possible, particularly deerstalkers, so they embraced ground control 1080 programmes for much of rugged Stewart Island and for the extraordinarily rugged and remote Pembroke Wilderness Area of Fiordland National Park. The result has been that for between $100-$200 per hectare per treatment, ground based 1080 pest control programmes have been underway for years in these forests. They have proved only a fraction as ecologically effective as the aerial operations that achieve an almost total eradication of pests for around $20/hectare per treatment.
Why? Because with the aerial methods you can treat the entire forest in one day or so. Using pre - feed treatments and GPS technology, you make sure that no pockets of untreated pests survive to re-invade the surrounding clear areas. Ground methods always take many weeks to carry out. This means that you will always leave pockets of untreated forest in the short or long term as a source area for rapid re-invasion of previously treated areas.
The plot gets even thicker when many in Southland, like the Greens, started talking about introducing a bounty system for possums to encourage people to kill them and not waste the furs. What it actually does is it encourages people to farm possums and then these operators also become the lead campaigners against effective pest control operations like aerial 1080 treatment. The whole possum fur industry is then also funded by the tax payer...forever! An important lesson from the rabbit plague history was that it wasn't until rabbits were decommercialised that headway was made in controlling these totally destructive herbivores.
Integrated pest control in NZ is analagous to perhaps road building or building aeroplanes or computers, is something where we can all play a small and important role. However to do it on an large ecosystem scale that ensures the long term survival of whole ecosystems and species, it requires the highest level of technical skills, their efficient application and a wholehearted focus on getting the job done once and for all.
With such focus, we could potentially rid Stewart Island of all introduced pest within the next 2 years and what a stunning conservation achievement that would be...and then Great Barrier and then D'Urville and them North?