Review of rat invasion biology

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dc.contributor.author Russell, JC
dc.contributor.author Towns, DR
dc.contributor.author Clout, MN
dc.date.accessioned 2022-03-02T03:59:26Z
dc.date.available 2022-03-02T03:59:26Z
dc.date.issued 2019-12-1
dc.identifier.citation Science for Conservation. 2008. Department of Conservation. 1-53
dc.identifier.uri https://hdl.handle.net/2292/58348
dc.description.abstract In this paper, we review and analyse how three species of invasive rat (Rattus rattus, R. norvegicus and R. exulans) disperse to and invade New Zealand offshore islands. We also discuss the methods used to detect and prevent the arrival of rats on islands. All species of invasive rat can be transported by ship. However, rats can also swim to islands. Swimming ability varies greatly between individual rats, and is probably a learned trait; it is unlikely to be affected by variation in sea temperature in this region. Norway rats (R. norvegicus) are the best swimmers and regularly swim up to 1 km. Therefore, to prevent recurrent swimming invasions of islands, source populations may need to be controlled. Since islands differ in their attributes and individual rats differ in their behaviours, multiple devices need to be used to detect and prevent the invasion of islands, including poisons, traps, passive detection devices and trained dogs. In New Zealand, 85% of rat incursions have been successfully intercepted using traps and/or poisons. Any response should cover at least a 1-km radius around the point of incursion. If trapping, it is recommended that jaw traps are used. If using poison, it is recommended that hand-spread, short-life, highly palatable bait of the maximum permissible toxin concentration in small pellet form is used; if bait stations are used, large wooden tunnels that have a line of sight through them are recommended. To intercept invasions early, it is recommended that island surveillance is undertaken at least annually (preferably every 6 months).
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.title Review of rat invasion biology
dc.type Book
pubs.volume 2019-December
dc.date.updated 2022-02-04T08:56:35Z
dc.rights.holder Copyright: Crown Copyright, Department of Conservation en
pubs.publication-status Published
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.elements-id 873634


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