Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

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one publication added to basket [174216]

Effects of predation and dispersal on Mastomys natalensis population dynamics in Tanzanian maize fields Vibe-Petersen, S.; Leirs, H.; De Bruyn, L. (2006). Effects of predation and dispersal on Mastomys natalensis population dynamics in Tanzanian maize fields. J. Anim. Ecol. 75(1): 213-220 In: Journal of Animal Ecology. Blackwell Science/British Ecological Society: Oxford. ISSN 0021-8790; e-ISSN 1365-2656, meer

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Trefwoorden

Aquatic organisms > Heterotrophic organisms > Predators Dispersion Eukaryotes > Animals > Chordata > Vertebrates > Mammals > Rodents Pest management Population dynamics Africa, Africa [Marine Regions]

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Auteurs		Top
Vibe-Petersen, S. Leirs, H. De Bruyn, L., meer

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Abstract

We investigate the effects of different levels of predation pressure and rodent dispersal on the population dynamics of the African pest rodent Mastomys natalensis in maize fields in Tanzania. Three levels of predation risk were used in an experimental set-up: natural level (control), excluding predators by nets and attracting avian predators by nest boxes and perch poles. Because dispersal of the rodents could mask the predation pressure treatment effects, control and predator exclusion treatments were repeated with enclosed rodent populations. Population growth during the annual population rise period was faster in the absence of predators and peak population size was higher, but otherwise dynamics patterns were similar for populations where predators had access or were attracted, indicating that compensatory mechanisms operate when rodents are exposed to high levels of predation risk. Reducing dispersal of rodents removed the effect of predation on population growth and peak size, suggesting that local predators may play a role in driving rodent dispersal, but have otherwise little direct effect on population dynamics.

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