Demography and population dynamics of the mouse opossum (<i>Thylamys elegans</i>) in semi-arid Chile

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dc.contributor.authorLima, M
dc.contributor.authorStenseth, NC
dc.contributor.authorYoccoz, NG
dc.contributor.authorJaksic, FM
dc.date.accessioned2025-01-21T01:30:40Z
dc.date.available2025-01-21T01:30:40Z
dc.date.issued2001
dc.description.abstractHere, we present, to the authors' knowledge for the very first time for a small marsupial, a thorough analysis of the demography and population dynamics of the mouse opossum (Thylamys elegans) in western South America. We test the relative importance of feedback structure and climatic factors (rainfall and the Southern Oscillation Index) in explaining the temporal variation in the demography of the mouse opossum. The demographic information was incorporated into a stage-structured population dynamics model and the model's predictions were compared with observed patterns. The mouse opossum's capture rates showed seasonal (within-year) and between-year variability, with individuals having higher capture rates during late summer and autumn and lower capture rates during winter and spring. There was also a strong between-year effect on capture probabilities. The reproductive (the fraction of reproductively active individuals) and recruitment rates showed a clear seasonal and a between-year pattern of variation with the peak of reproductive activity occuring during winter and early spring. In addition, the fraction of reproductive individuals was positively related to annual rainfall, while population density and annual rainfall positively influenced the recruitment rate. The survival rates were negatively related to annual rainfall. The average finite population growth rate during the study period was estimated to be 1.011 +/- 0.0019 from capture-recapture estimates. While the annual growth rate estimated from the seasonal linear matrix models was 1.026, the subadult and adult survival and maturation rates represent between 54% (winter) and 81% (summer) of the impact on the annual growth rate.
dc.fuente.origenWOS
dc.identifier.eissn1471-2954
dc.identifier.issn0962-8452
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96851
dc.identifier.wosidWOS:000171566100013
dc.issue.numero1480
dc.language.isoen
dc.pagina.final2064
dc.pagina.inicio2053
dc.revistaProceedings of the royal society b-biological sciences
dc.rightsacceso restringido
dc.subjectEl Nino
dc.subjectstructured models
dc.subjectsmall marsupials
dc.subjectdemography
dc.subjecttemporal variation
dc.subjectChile
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleDemography and population dynamics of the mouse opossum (<i>Thylamys elegans</i>) in semi-arid Chile
dc.typeartículo
dc.volumen268
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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