, Volume 10, Issue 2, pp 137–144 | Cite as

Temporal Distribution and Weather Correlates of Norway Rat (Rattus norvegicus) Infestations in the City of Madrid, Spain

  • Ibon Tamayo UriaEmail author
  • Jorge Mateu Mahiques
  • Lapo Mughini Gras
Original Contribution


Urban Norway rats are challenging pests, posing significant health and economic threats. Implementing ecologically based integrated rodent management (EBIRM) programmes relies primarily on the understanding of ecological relationships between rodents and their environments, with emphasis on the processes influencing rodent populations in the target ecosystem. We investigated the temporal distribution of urban Norway rat infestations in Madrid, Spain, and tested for the association of such infestations with temperature, relative humidity and precipitation by fitting a multivariate Poisson generalized linear model to a 3-year (2006–2008) daily time series of 4,689 Norway rat sightings. Norway rat infestations showed a marked seasonality, peaking in the summer. Most Norway rat sightings were reported on Mondays. Minimum temperature and relative humidity were positively associated with Norway rat infestation, whereas the association with precipitation was negative. The time series was adequately explained by the model. We identified previously unrecognized time periods that are more prone to Norway rat infestation than others and generated hypotheses about the association between weather, human outdoor activity, resource availability, rodent activity and population size. This provided local authorities engaged in preserving urban ecosystem health with basic research information to predict future rodent outbreaks and support the implementation of EBIRM programmes in urban areas.


urban pest Rattus norvegicus rat temporal distribution weather Madrid 


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Copyright information

© International Association for Ecology and Health 2013

Authors and Affiliations

  • Ibon Tamayo Uria
    • 1
    • 3
    • 6
    Email author
  • Jorge Mateu Mahiques
    • 2
  • Lapo Mughini Gras
    • 4
    • 5
  1. 1.Department of Health and Consumer AffairsGovernment of the Basque CountryDonostia-San SebastianSpain
  2. 2.Department of MathematicsUniversity of Jaume ICastellonSpain
  3. 3.Department of GeographyUniversity of AlcaláMadridSpain
  4. 4.Department of Veterinary Medical SciencesUniversity of BolognaBolognaItaly
  5. 5.Department of Veterinary Public Health and Food SafetyIstituto Superiore di SanitàRomeItaly
  6. 6.Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP)MadridSpain

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