Monitoring
We do pest control to protect New Zealand’s most vulnerable native species from rats, stoats and possums. We monitor native species carefully to make sure our pest-control efforts are effective.
We use a variety of methods, one of which is applying biodegradable 1080 by air over specified large areas of rugged terrain. Ground-based predator control methods also play an important part, but on their own, these tools have limited use in areas that are difficult to access, too large or too remote.
There are many ways we monitor species before and after pest control. Some of the most compelling results have come from comparison work:
Highlights
Kiwi chick survival rates are 12 times higher with predator control
Photo: Neil Hutton
Three times more whio survived to fledge after aerial 1080 and trapping
Photo: Alan Reith
We’ve monitored more than 600 kiwi during and after 1080 operations over the last 10 or more years, and none has ever been killed by 1080.
The comparison method
- ‘Area A’ gets 1080 pest control.
- ‘Area B’ doesn’t get any pest control.
- We monitor both areas and compare the results.
Results
Blue duck/whio monitoring
Whio raise more ducklings after 1080 treatment than when only traps are used to control stoats.
Long and short-tailed bat/pekapeka monitoring
In 25 years long-tailed bats have turned from decreasing at 5% to increasing by 4% per year.
Rifleman/tītipounamu monitoring
Rifleman raised three time more chicks after 1080 pest control than without.
Rock wren/tuke monitoring
Rock wren raised up to five times more chicks after 1080 treatment than without.
Save Our Iconic Kiwi
Kiwi populations around the country are declining at an average of about 2% a year – a serious situation. It’s mostly due to predation upon kiwi chicks by stoats, cats, dogs and ferrets. The goal for Save Our Iconic Kiwi is to turn this decline around, so that every type of kiwi is increasing.
In 2017, we started monitoring southern Fiordland tokoeka (kiwi) at Shy Lake, between Wet Jacket Arm and Breaksea Sound. The goal is to gather data before and after 1080 to ensure that we are controlling pests in large, remote areas of Fiordland in the most effective and efficient way to save the most kiwi.
In the absence of pest control, every chick we monitored was killed by a stoat.
Read about this work in our blog series, Fiordland Kiwi Diaries.
