Show simple item record Galende, Gladys I. Raffaele, Estela 2019-04-08T20:47:10Z 2012-10
dc.identifier.citation Galende, Gladys I.; Raffaele, Estela; Diet selection of the southern vizcacha (Lagidium viscacia): A rock specialist in north western Patagonian steppe, Argentina; Polish Academy of Sciences; Acta Theriologica; 57; 4; 10-2012; 333-341
dc.identifier.issn 0001-7051
dc.description.abstract The southern vizcacha (Lagidium viscacia) is a rock specialist that inhabits small colonies in isolated rocky outcrops of northwestern Patagonia. This study analyzes its diet selection in relation to food availability, establishes the degree of dietary specialization, and discusses the potential competition with exotic herbivores. Diet composition and food availability were determined in summer and winter in eight rocky outcrops by microhistological analysis of fecal pellets, and food availability was estimated by the Braun Blanquet cover abundance scale. Vegetation cover differences were detected by using a random analysis of variance (ANOVA) factorial block design, and dietary preferences were determined by the confidence interval of Bonferroni. The southern vizcacha showed a specialized feeding behavior despite the consumption of a wide variety of items. Their diet was concentrated on a few types of food, mainly grasses, and the trophic niche was narrow and without seasonal variations. In winter, when food was scarce and of lower quality than summer, diet was dominated by Stipa speciosa, suggesting a selection according to the selective quality hypothesis. Our results (narrow trophic niche, restricted activity near rocky outcrops, and a diet with high proportions of low-quality grasses) showed that the vizcacha is an obligatory dietary specialist, and these characteristics made it highly vulnerable to changes in food availability. In this scenario, overgrazing caused by alien species with similar diets, as the European hare and livestock, could negatively affect their colonies.
dc.format application/pdf
dc.language.iso eng
dc.publisher Polish Academy of Sciences
dc.rights info:eu-repo/semantics/restrictedAccess
dc.subject SELECTIVITY
dc.subject TROPHIC NICHE
dc.subject.classification Otras Ciencias Biológicas
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Diet selection of the southern vizcacha (Lagidium viscacia): A rock specialist in north western Patagonian steppe, Argentina
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion 2019-03-08T16:45:15Z
dc.identifier.eissn 2190-3743
dc.journal.volume 57
dc.journal.number 4
dc.journal.pagination 333-341
dc.journal.pais Polonia
dc.journal.ciudad Bialowieza
dc.description.fil Fil: Galende, Gladys I.. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Departamento de Zoología; Argentina
dc.description.fil Fil: Raffaele, Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche. Laboratorio de Ecotono; Argentina
dc.journal.title Acta Theriologica
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/
dc.conicet.fuente individual

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