Demographic dynamics of a neotropical small rodent (<i>Phyllotis darwini</i>)

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dc.contributor.authorLima, M
dc.contributor.authorJulliard, R
dc.contributor.authorStenseth, NC
dc.contributor.authorJaksic, FM
dc.date.accessioned2025-01-21T01:30:42Z
dc.date.available2025-01-21T01:30:42Z
dc.date.issued2001
dc.description.abstract1. The leaf-eared mouse (Phyllotis darwini) exhibits large numerical fluctuations associated with high- and low-rainfall years in semi-arid Chile. Using capture-mark-recapture (CMR) statistical modelling.. we provide a detailed description of the demographic variation in this species. We studied between-year and seasonal variation of demography, and tested for the relative importance of endogenous and exogenous factors as covariates of survival, recruitment, maturation and reproduction over a 12-year period.
dc.description.abstract2. The demographic variables studied show larger between-year than within-year (seasonal) variation, emphasizing the importance of this source of external variability. We found that both feedback structure and exogenous factors operate together on different demographic processes of this species.
dc.description.abstract3. We found positive direct feedback effects on survival rate and negative feedback on recruitment, fraction of reproductive individuals and female maturation rates. The ratio between barn and magellanic homed owls showed an important effect on most of the demographic variables of leaf-eared mice, in particular by influencing negatively survival rates and the fraction of reproductive individuals, thus suggesting the importance of non-lethal predation.
dc.description.abstract4. Hence, feedback intrinsic mechanisms (density-dependence), owls and climate (rainfall and Southern Oscillation Index (SOI)) operate simultaneously in determining the demography of leaf-eared mice. We hypothesize that trophic interactions with owls (and perhaps other predators) may cause second-order feedback responses in demography and population dynamics of this small rodent species.
dc.fuente.origenWOS
dc.identifier.eissn1365-2656
dc.identifier.issn0021-8790
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96864
dc.identifier.wosidWOS:000171128800006
dc.issue.numero5
dc.language.isoen
dc.pagina.final775
dc.pagina.inicio761
dc.revistaJournal of animal ecology
dc.rightsacceso restringido
dc.subjectbarn and magellanic homed owls
dc.subjectChile
dc.subjectdensity dependence
dc.subjectdemography
dc.subjectEl Nino
dc.subjectoutbreaks
dc.subjectrainfall
dc.subjectsemi-arid region
dc.subjectSOI
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleDemographic dynamics of a neotropical small rodent (<i>Phyllotis darwini</i>)
dc.typeartículo
dc.volumen70
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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