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   Rattus norvegicus (mammal)
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    Details of this species in Denmark
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Established
    Source: Weile, 1998
    Arrival Date:
    Introduction:
    Species Notes for this Location:
    Rattus norvegicus is common throughout Denmark.
    Management Notes for this Location:
    Rat control in Denmark is under the control of local municipalities. Since 1907, a special act on rats and their control has been in force. All rat infestations must be reported, and around 100,000 rat notifications are received annually. Property owners are required to ensure that their buildings and premises are rat proof, and that edible food is not available. The total costs of rat control in Denmark is US$7.8 million. Since 1969, some resistance to bromadiolone and difenacoum has been detected. The use of rodenticides in Denmark is now restricted in order to prevent the rapid development of resistance among rat populations. Pest control operators are required to use the weakest rodenticides first.
    Location Notes:
    Last Modified: 25/08/2006 3:15:13 p.m.
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