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   Rattus norvegicus (mammal)
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    Details of this species in Wenderholm Regional Park
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Eradicated
    Source: Lovegrove et al. 2002.
    Arrival Date:
    Introduction:
    Species Notes for this Location:
    Management Notes for this Location:
    Intensive control of alien species commenced at Wenderholm in 1992, when annual rodent poisoning began from spring to late summer, alternating between Talon 50 WB pellets (brodifacoum) and Storm Rodenticide (Flocoumafen), to avoid selection for toxin resistance. Initially, drainpipe bait stations were used, but in 1999 these were replaced with Philproof bait stations to reduce bait wastage, and Pestoff Rodent Blocks were used (brodifacoum) as the bait. Rat numbers have been reduced to very low levels, and there is no evidence of predation on translocated robin (see Petroica australis in IUCN Red List of Threatened Species) nests. There is some concern about the residual effects of second-generation anticoagulants, and future poisoning operations may require a more environmentally acceptable toxin.
    Location Notes:
    Last Modified: 21/08/2006 10:49:21 a.m.


ISSG Landcare Research NBII IUCN University of Auckland