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      Roedores sigmodontinos de la Provincia de Misiones (Argentina): Síntesis de datos en una década de muestreos esporádicos Translated title: Sigmodontine rodents of the Province of Misiones (Argentina): data synthesis after a decade of sporadic samplings

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          Abstract

          Son limitados los antecedentes sobre trampeos de micromamíferos en la Provincia de Misiones, Argentina, aspecto que se refleja no solo en un pobre conocimiento general de sus ensambles de roedores sigmodontinos, sino también en sus estatus de conservación (i.e., muchos caracterizados como datos deficientes). En esta contribución, que sigue parcialmente el estilo de un "data paper", se resumen los resultados obtenidos en algo más de una década, de muestreos, mayoritariamente ejecutados como apoyo a proyectos parasitológicos. Se llevaron a cabo trabajos de campo en 21 localidades que representan diversos ambientes del bosque Atlántico del Alto Paraná, bosque húmedo de Araucaria, campos y malezales. Se obtuvieron un total de 1.026 individuos correspondientes a 17 especies y 14 géneros de sigmodontinos y murinos, sobre un total acumulado de 12.662 trampas noche. Aquellos más abundantes fueron Akodon montensis (n = 700) y Oligoryzomys nigripes (n = 136), esto es, sigmodontinos resilientes al disturbio del hábitat. Las formas que se pueden considerar más estrictamente selváticas, como Abrawayaomys chebezi, Castoria angustidens o Juliomys pictipes, estuvieron virtualmente ausentes. Resulta imperativo extender los muestreos hacia los pocos sectores forestales aún conservados y, además, hacerlos más prolongados en el tiempo, como una estrategia para incrementar la acumulación de especies y detectar aquellas posiblemente raras. A la par, efectuar trampeos en el sotobosque y dosel arbóreo, a la fecha carentes de aproximaciones sistemáticas en Misiones.

          Translated abstract

          There have been only a very few collections of small mammals in the Misiones Province, Argentina, a fact that is reflected not only in a poor general knowledge of the sigmodontine rodent assemblages but also in their conservation status (i.e., many are characterized as data deficient). In this contribution, which partially follows the style of a "data paper," we summarize the results obtained through a little more than a decade of sampling, mostly undertaken in support of parasitological projects. We conducted field work in 21 localities representing several environments belonging to the Upper Paraná Atlantic forest, humid Araucaria forest, and fields and oldfields. A total of 1,026 individuals belonging to 17 species and 14 genera of sigmodontine and murine rodents were captured, after a cumulative effort of 12,662 trapping nights. Those species best represented were Akodon montensis (N = 700) and Oligoryzomys nigripes (n = 136), which typically inhabit disturbed environments. Those forms more strictly sylvan, such as Abrawayaomys chebezi, Castoria angustidens or Juliomys pictipes, were virtually absent. It is strongly recommended to expand surveys to the few better-preserved forest remnants and to have longer sampling periods as a strategy to increase species accumulation and detection of rare species. In addition, to increase trapping in the understory and canopy, which to date are lacking in systematic sampling in Misiones.

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          Most cited references 53

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          Specimen collection: an essential tool.

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            Differential impact of landscape transformation on pumas (Puma concolor) and jaguars (Panthera onca) in the Upper Paraná Atlantic Forest

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              A biodiversity hotspot losing its top predator: The challenge of jaguar conservation in the Atlantic Forest of South America

              The jaguar is the top predator of the Atlantic Forest (AF), which is a highly threatened biodiversity hotspot that occurs in Brazil, Paraguay and Argentina. By combining data sets from 14 research groups across the region, we determine the population status of the jaguar and propose a spatial prioritization for conservation actions. About 85% of the jaguar’s habitat in the AF has been lost and only 7% remains in good condition. Jaguars persist in around 2.8% of the region, and live in very low densities in most of the areas. The population of jaguars in the AF is probably lower than 300 individuals scattered in small sub-populations. We identified seven Jaguar Conservation Units (JCUs) and seven potential JCUs, and only three of these areas may have ≥50 individuals. A connectivity analysis shows that most of the JCUs are isolated. Habitat loss and fragmentation were the major causes for jaguar decline, but human induced mortality is the main threat for the remaining population. We classified areas according to their contribution to jaguar conservation and we recommend management actions for each of them. The methodology in this study could be used for conservation planning of other carnivore species.
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                Author and article information

                Journal
                reb
                Ecología en Bolivia
                Ecología en Bolivia
                Plural Editores (La Paz, , Bolivia )
                1605-2528
                2075-5023
                April 2021
                : 56
                : 1
                : 42-64
                Affiliations
                La Plata Buenos Aires orgnameUniversidad Nacional La Plata orgdiv1Consejo Nacional de Investigaciones Científicas y Técnicas orgdiv2Centro de Estudios Parasitológicos y de Vectores Argentina
                Quito orgnameInstituto de Diversidad y Evolución Austral orgdiv1Consejo Nacional de Investigaciones Científicas y Técnicas Ecuador ulyses@ 123456cenpat-conicet.gob.ar
                Article
                S1605-25282021000100006 S1605-2528(21)05600100006

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 55, Pages: 23
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                Categories
                RESEÑA

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