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   Rattus norvegicus (mammal)
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    Details of this species in Rasa Is.
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Eradicated
    Source: Island Conservation and Ecology Group, 2004
    Arrival Date: early 1900s
    Introduction:
    Species Notes for this Location:
    Guano miners introduced rats and mice to Rasa Island at the turn of the century (Donlan et al., 2000).
    Management Notes for this Location:
    An attempt was made to eradicate Rattus norvegicus from Rasa Island (60 ha) in 1994, in a programme undertaken by Island Conservation and Instituto Nacional de Ecologia (led by Jesus Ramirez). The methods used were brodifacoum (50ppm, wax blocks) bait stations and trapping on a 25 x 25m grid over a one year period (J. Ramirez, pers. comm.; Tershy et al. 2002).
    Location Notes:
    Impacts:
    Reduction in native biodiversity: Rats and mice may be responsible for the absence of nocturnal hole and crevice nesting birds on Rasa Island (Donlan et al., 2000).
    Last Modified: 25/08/2006 3:32:39 p.m.


ISSG Landcare Research NBII IUCN University of Auckland