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Mammalian Biology

, Volume 72, Issue 6, pp 364–371 | Cite as

Spatial and temporal patterns of brown rat (Rattus norvegicus) abundance variation in poultry farms

  • Isabel Elisa Gómez VillafañeEmail author
  • María Busch
Original investigation

Abstract

The temporal and spatial patterns of rat abundance variations were studied, and which factors might affect these patterns in poultry farms. Forty-eight poultry farms were sampled from spring 1999 to winter 2001 in Buenos Aires, Argentina. Environmental variables of farms, meteorological variables and distances among farms were registered to evaluate a possible association with rat abundance estimated by trap success. Rattus norvegicus was the dominant rat species in the study area. Rat abundance did not vary temporally and there was reproduction at all times. Trap success was more similar among neighboured farms than among farms further apart. Contrary to the abundance of other small rodents, rat abundance was not significantly related to farm characteristics. The lack of coincidence between rats and other small rodents suggests the existence of a differential response of rats to environmental factors of the poultry farms.

Key words

Rattus norvegicus poultry farms abundance 

Räumliche und zeitliche Variation in der Abundanz der Wanderratte (Rattus norvegicus) auf Geflügelfarmen

Zusammenfassung

Das Ziel dieser Arbeit war, die zeitliche und räumliche Variation der Abundanz von Ratten zu studieren, und zu klären, welche Faktoren diese Variation auf den Geflügelfarmen beeinflussen. Achtundvierzig Geflügelfarmen wurden vom Frühjar 1999 bis zum Winter 2001 in Buenos Aires, Argentinien untersucht. Ökologische Variablen der Farmen, die Distanz zwischen den Farmen und verschiedene Wettervariablen wurden analysiert, um die mögliche Assoziation mit der Abundanz der Ratten, als Zahl der Fänge in den Fallen abgeschätzt, auszuwerten. Rattus norvegicus war die dominante Rattenart des Studienraums. Die Abundanz der Ratten hatte keine zeitliche Variation und die Reproduktion war fortdauernd. Die Zahl der Fänge war ähnlicher zwischen Nachbarfarmen als zwischen weiter entfernten Farmen. Im Gegensatz zu der Abundanz von anderen kleinen Nagetieren war die Abundanz der Ratten mit keinen Farmeigenschaften assoziiert. Die unterschiedlichen Resultate zwischen Ratten und anderen kleinen Nagetieren suggerieren eine unterschiedliche Reaktion der Ratten auf ökologische Faktoren der Geflügelfarmen.

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Copyright information

© Deutsche Gesellschaft für Säugetierkunde, e. V. DGS 2007

Authors and Affiliations

  1. 1.Av. Cantilo S/N, Laboratorio de Ecología de Poblaciones, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresArgentina

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