Pest Monitoring

With Pomona and Rona Islands being so close to the mainland, the risk of re-invasion by stoats and rodents is high. It is extremely important that anyone visiting the islands makes sure that they are not likely to accidentally introduce pests to the islands by checking their boats and gear for rats, mice and seeds.

Unfortunately, following four years completely pest-free, mice were the first pest to re-invade both islands.

Pomona
On Pomona the mice were shortly followed by rats. In response to the rat re-invasion, the Trust deployed a network of 172 traps and 179 bait stations. When rat numbers on the adjacent mainland are low we have learnt that it is possible to keep rats on Pomona at undetectable levels. However, whenever there is a beech mast the risk of rats re-establishing a population on the island increases significantly. With such an extensive trap and bait station network on Pomona, we are able to keep rat numbers at manageable levels, which is good news for the birdlife on the island.

Rona
Rona has always been rat-free and our trap network reduces the risk of rats establishing a population on the island. Mice, however, have been more of a problem as they provide competition for food with the young kiwi on the island. To counter the mouse threat, the Trust has deployed a network of 494 bait stations on the island. When mouse numbers increase following a beech mast, the network is activated at no risk to the kiwi. Again we have learnt that in normal conditions it is possible to keep mice at undetectable levels on Rona.

The trap networks on both islands also target stoats. Both islands are within easy swimming range for stoats and the occasional stoat does get caught in our traps.

Monitoring
In addition to the traps and bait stations on Pomona and Rona, the Trust has a network of tracking tunnels on both islands which can be activated at any time.

Funding for our on-going monitoring work is generously provided by Gary Chisholm, Meridian Energy, DOC, Kiwis for Kiwi and Friends of Pomona.



Pomona Island Charitable Trust
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Pest Monitoring

With Pomona and Rona Islands being so close to the mainland, the risk of re-invasion by stoats and rodents is high. It is extremely important that anyone visiting the islands makes sure that they are not likely to accidentally introduce pests to the islands by checking their boats and gear for rats, mice and seeds.

Unfortunately, following four years completely pest-free, mice were the first pest to re-invade both islands.

Pomona
On Pomona the mice were shortly followed by rats. In response to the rat re-invasion, the Trust deployed a network of 172 traps and 179 bait stations. When rat numbers on the adjacent mainland are low we have learnt that it is possible to keep rats on Pomona at undetectable levels. However, whenever there is a beech mast the risk of rats re-establishing a population on the island increases significantly. With such an extensive trap and bait station network on Pomona, we are able to keep rat numbers at manageable levels, which is good news for the birdlife on the island.

Rona
Rona has always been rat-free and our trap network reduces the risk of rats establishing a population on the island. Mice, however, have been more of a problem as they provide competition for food with the young kiwi on the island. To counter the mouse threat, the Trust has deployed a network of 494 bait stations on the island. When mouse numbers increase following a beech mast, the network is activated at no risk to the kiwi. Again we have learnt that in normal conditions it is possible to keep mice at undetectable levels on Rona.

The trap networks on both islands also target stoats. Both islands are within easy swimming range for stoats and the occasional stoat does get caught in our traps.

Monitoring
In addition to the traps and bait stations on Pomona and Rona, the Trust has a network of tracking tunnels on both islands which can be activated at any time.

Funding for our on-going monitoring work is generously provided by Gary Chisholm, Meridian Energy, DOC, Kiwis for Kiwi and Friends of Pomona.



Pomona Island Charitable Trust
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