Bisecurity in the Hauraki Gulf
Man’s best friend has the nose for finding
Biosecurity specialist Brian Shields
with his rodent dog Tui.
Every month as a freight barge
heads out of Half Moon Bay on its way to Rakino Island in the Hauraki
Gulf with household goods, cars, building materials and other items from
the mainland, Brian Shields and his dog Tui are onboard checking for
Brian is a biosecurity specialist at the
Auckland Council working in the Hauraki Gulf. He travels with the barge
on its monthly run to Rakino, doing an inspection of the barge and the
goods on board with Tui, who is trained to detect rodents by scent
making sure none reach the pest-free island.
The Sealink vessel 'Island Navigator' is
regularly checked over for its Rakino run.
“I have checked the barge every month for
a year now and we’ve haven’t found anything yet. However, when you have
a large amount of freight and items like building materials, there is
always the risk that a rat or mouse or even a possum is hiding amongst
it,” says Brian. “As well as Tui being there specifically for rodents,
I’m there for a visual check for other pests like possums, Argentine
ants and rainbow skinks. Together we cover a lot of bases.”
Brian recently inspected a house which was
heading over to Rakino. He and Tui went through a scent and visual check
of the entire building, including the roof cavity. Bait stations were
also put into the house for the journey and eventual site placement.
Brian also uses the trip to check the bait stations on board the barge
and the array of bait stations that are on the island foreshore.
Together with 17 DOC200 traps, this creates a formidable line of defence
for Rakino, which has been free of animal pests since the last Norway
rat was eradicated in 2002. The DOC200 traps act as both a trap and a
and are set for rodents and mustelids (weasels and ferrets), with baits
used that will attract these species. These traps are maintained on
separate visits to the island by Brian with the help of island
“The locals are on board with what we’re
doing – they value having the island pest-free and work well with us,”
says Brian. The freight barge is operated by SeaLink, which is currently
undergoing the certification process to gain a Pest-Free Warrant. This
is a joint Auckland Council – Department of Conservation biosecurity
accreditation for their vessels and premises. “It’s about SeaLink
reaching and maintaining a level of standards, and having standard
operating procedures in place for things like pest control and
monitoring,” says Brian. “They will also have biosecurity messaging as
part of their core business to get the warrant.”
The DOC 2000 is a twin snap trap
contained within a wooden
enclosure and designed to eliminate both rats and mustelids.
SeaLink has been very supportive of council initiatives and programmes.
Undergoing the Pest-Free Warrant is very valuable as it gives SeaLink
the official seal of approval for the good work that is already going
on. All vessels should have pest control such as bait stations or traps
on board and around where they’re moored. Pest sightings should also be
reported immediately. If a pest like a rat or a possum is spotted on
board or around the marina and that boat is about to head out to the
Hauraki Gulf, it’s essential that the sighting be reported to the
Auckland Council or DoC so it can be dealt with by experts.