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   Rattus norvegicus (mammal)
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    Details of this species in Alberta
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Present/controlled
    Source: Bourne, 2006
    Arrival Date: 1775
    Species Notes for this Location:
    Rattus norvegicus first arrived in North America along the eastern seaboard in about 1775, aboard steerage and merchant sailing vessels. They spread westward across the continent accompanying human settlement, and entered upper Canada in the early 1800s. About a century later they invaded the Canadian prairie through Saskatchewan from the mid-west USA. A decade after World War I they had reached central Saskatchewan, and by the end of World War II had reached the eastern border of Alberta. Migration into Alberta has been stopped by an ongoing eradication programme, halting the westward spread of R. norvegicus.
    Management Notes for this Location:
    Since 1950, Alberta Agriculture has supervised and co-ordinated a rural-based Norway rat control program that has essentially kept the province rat-free. Success is achieved by eliminating invading rats within a control zone 600 km long and 30 km wide along the eastern border of the province. A systematic detection and eradication system is used throughout the zone to keep rat infestations to a minimum. Strong public support and, citizen participation was developed through public education and a sound awareness effort. Although rat infestations within the interior are minor, a rat response plan is in place to deal with a large or difficult case. Government preparedness, legislation, climate, geography, effective rat baits and close co-operation between provincial and municipal governments have contributed to program success (Bourne, 2006). For more detailed information on the control programme, please see Norway Rat Exclusion in Alberta
    Location Notes:
    Last Modified: 25/08/2006 2:59:34 p.m.

ISSG Landcare Research NBII IUCN University of Auckland