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   Rattus norvegicus (mammal)
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    Details of this species in Intermares
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Present/controlled
    Source: Zeppelini et al. 2007
    Arrival Date:
    Introduction:
    Species Notes for this Location:
    Hawksbill (see Eretmochelys imbricata in IUCN Red List of Threatened Species) nesting and green turtle (see Chelonia mydas in IUCN Red List of Threatened Species) foraging areas has been reported in disturbed areas at Mar de Macaco in the municipality of Intermares, Paraíba State, northeastern Brazil. The Urban Turtles Project (UTP) was established to monitor this nesting and foraging areas of these endangered turtles. Norway rat R. norvegicus and the house mouse Mus musculus have been reported in this area. Predation by the Norway rat on eggs and hatchlings during the 2003/2004 and 2004/2005 nesting season was identified as a the main cause of poor nesting rates (losses of close to 3000 eggs and hatchlings were estimated).
    Management Notes for this Location:
    Eradication of the Norway rat along a 2.3 km section of the nesting area was planned, using anticoagulant brodifacoum, lethal to rats even in small concentrations. Care was taken to reduce risk of poisoning of non-target species. The project has been declared a success as no nests were attacked in the 2005/2006 and 2006/2007 nesting season. Monitoring is ongoing. For more details on the project please follow this link to pages 5 and 6 Zeppelini et al. 2007.
    Location Notes:
    Impacts:
    Threat to endangered species: Predation by the Rattus norvegicus on eggs and hatchlings of the endangered Hawksbill turtle (see Eretmochelys imbricata in IUCN Red List of Threatened Species) during the 2003/2004 and 2004/2005 nesting season was identified as a the main cause of poor nesting rates (losses of close to 3000 eggs and hatchlings were estimated) (Zeppelini et al. 2007).
    Last Modified: 3/08/2007 3:18:20 p.m.


ISSG Landcare Research NBII IUCN University of Auckland