About
34
Publications
9,924
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
271
Citations
Publications
Publications (34)
Supplementary Material
The competitive exclusion theory suggests that closely related and ecologically similar species living in sympatry should differ along some axes of their n-dimensional ecological niches to reduce interspecific competition. Cormorants are foot-propelled pursuit diving aquatic birds that constitute an interesting model to study resources partitioning...
Resumen.-Bajo ciertas circunstancias los carnívoros pueden matar muchas más presas de las que pueden con-sumir, este comportamiento se denomina "matanza excedente". En verano de 2018 se encontraron grandes bandadas de Choiques (Rhea pennata pennata) pastoreando en campos linderos a Puerto Deseado, en la Reserva Provincial Ría Deseado, e incluso ing...
The presence of unsupervised dogs in urban areas close to sites of high natural value can have negative effects on wildlife. On the Patagonian coast, where cities are often surrounded by natural environments, this problem may affect seabird colonies. Two islands with Magellanic Penguin (Spheniscus magellanicus) colonies belonging to a protected are...
Protected areas recently created in Argentina often include previously degraded lands, such as sheep ranches in the Patagonian deserts. We show the results of a 14-year monitoring program of three formerly persecuted carnivores, the culpeo fox (Lycalopex culpaeus), the South American grey fox (Lycalopex griseus) and the puma (Puma concolor), in two...
Especie de amplia distribución y relativamente abundante, a veces como componente mayoritario, de las comunidades demicromamíferos, en gran parte de su geonemia. Ocupa una gran diversidad de ecorregiones, por lo que se la puede considerar como relativamente generalista de hábitat. Este taxón está amparado en varios parques y reservas nacionales y p...
Es una especie endémica de Argentina, con una distribución fragmenta y restringida debido a que es especialista de hábitat. Se conocen menos de 9 localidades de presencia y es una especie naturalmente rara en términos de abundancia. Puntualmente, algunas poblaciones (e.g., Salar de Pipanaco) se encuentran actualmente amenazadas por el avance de las...
RESUMEN: Las pulgas del género Parapsyllus Enderlein, 1903 (Rhopalopsyllidae, Parapsyllinae) parasitan
aves en forma exclusiva, en su mayoría marinas. Damos a conocer un nuevo registro de Parapsyllus longicornis
(Enderlein, 1901) parasitando al Pingüino de Magallanes Spheniscus magellanicus (Forster) (Aves, Sphenisciformes,
Spheniscidae) en la Arge...
RESUMEN. El Parque Nacional Bosques Petrificados de Jaramillo (PNBPJ), situado en la provincia de Santa
Cruz, es un área silvestre destinada a la protección de la Estepa Patagónica, una de las ecorregiones más vulnerables
y de máxima prioridad de conservación. Estudiamos la composición específica, abundancia relativa,
riqueza y diversidad de los mi...
The National Park Bosques Petrificados de Jaramillo (PNBPJ), located in Santa Cruz Province, is a wild area designed to protect the Patagonian Steppe, which is considered one of the most vulnerable ecoregions and a priority for conservation. We studied species composition, relative abundance, richness and biodiversity of the small mammal assemblag...
La Comadrejita Patagónica (L. halli) es un marsupial vulnerable, muy poco conocido y la información sobre la especie es escasa. Damos a conocer diferentes especies de pulgas parásitas de la comadrejita patagónica. Durante los veranos y principios de otoños de 2006 a 2007 y 2011 a 2013, capturamos 25 comadrejitas en el Parque Nacional Bosques Petrif...
En el presente trabajo se explicita el proceso tecnológico, mediante una Arquitectura Web GIS que permita publicar información estadística obtenida y su posterior análisis aplicado en nuestro caso de estudio de ecología urbana en la distribución de los perros callejeros y su impacto en el ejido urbano y suburbano; de la ciudad de Puerto Deseado. La...
Los roedores caviomorfos se encuentran en una gran variedad de hábitats, tienen hábitos diversos, y una gran disparidad en el tamaño corporal. Como consumidores primarios, constituyen una oferta de alimento importante para los predadores. Revisamos 127 trabajos que incluyeron 249 dietas de mamíferos carnívoros con el fin de detectar la presencia de...
Although Tadarida brasiliensis is one of the most widely distributed species of bats in Argentina, it is nevertheless extremely scarce in Patagonia. We report a second record of T. brasiliensis for Santa Cruz province, which fills a gap in the geographical distribution of this species in that province and is also the third southernmost record for t...
Attempts to control cougar (Puma concolor) and culpeo fox (Pseudalopex culpaeus) populations in Patagonia through poisoning, negatively affects grey foxes (Pseudalopex griseus) and many other non-target species. It is therefore advisable to develop selective predator control methods. Among a wide range of potential methods, are those based on manip...
We searched for correspondence between morphology and trophic habits in an assemblage of six species of coexisting carnivorans from Patagonia to confirm the predictive power of the study of the trophic morphology as an approach to the study of resource partitioning, which is often utilized in paleontological studies. The six species were assigned t...
We describe a new species within the genus Liolaemus from southeast Argentine Patagonia. This new taxon, Liolaemus yatel sp. nov., presents anatomical traits shared with the Liolaemus lineomaculatus section within the Liolaemus lineomaculatus group, especially the absence of precloacal pores in both sexes. However, Liolaemus yatel sp. nov. does not...
The summer diet of the Patagonian opossum Lestodelphys halli was studied in southern Argentinean Patagonia. Faeces of opossums captured alive and stomach contents from dead animals were collected and analyzed. A wide variety of invertebrates (87.2% frequency of occurrence) followed by birds and reptiles (10.64%) occurred both in faeces and stomachs...
The summer diet of the Patagonian opossum Lestodelphys halli was studied in southern Argentinean Patagonia. Faeces of opossums captured alive and stomach contents from dead animals were collected and analyzed. A wide variety of invertebrates (87.2% frequency of occurrence) followed by birds and reptiles (10.64%) occurred both in faeces and stomachs...
There is evidence for the ecological extinction of the native prey of the puma Puma concolor in north-western Argentine Patagonia. In this study we examine whether this is also the case in southern Patagonia. From 2004 to 2007 we examined the puma’s diet in three protected areas and two sheep ranches in Santa Cruz province. A total of 282 puma scat...
The Lesser Rhea (Rhea pennata pennata) has suffered a marked decline in numbers over recent decades, probably mainly as a result of livestock production and overhunting. Our aim was to investigate the factors that determine the distribution of Lesser Rheas in southern Patagonia and to generate a predictive regional distribution map. We surveyed 800...
Sheep ranchers (n = 90) were surveyed to evaluate their interest in the incorporation of predator selective control methods. We based our survey on the characterization of the sheep ranching system of Santa Cruz province and its relationship with culpeo fox (Lycalopex culpaeus) predation. For a large percentage of producers (73%), the carrying capa...
Sheep ranchers (n = 90) were surveyed to evaluate their interest in the incorporation of predator selective control methods. We based our survey on the characterization of the sheep ranching system of Santa Cruz province and its relationship with culpeo fox (Lycalopex culpaeus) predation. For a large percentage of producers (73%), the carrying capa...
Presentamos el primer análisis cuantitativo de la dieta de Falco sparverius en el sur de Argentina. Identificamos 1169 ítems de presas en un total de 272 egagrópilas y siete restos de presas de cuatro sitios de estudio en la Patagonia. En esta área, F. sparverius se alimentó principalmente de escorpiones (Bothruridae), escarabajos (Coleoptera), hor...
Culpeo fox (Pseudalopex culpaeus) and gray fox (Pseudalopex griseus) are heavily culled in Patagonia. Fox populations seem to persist thanks to spatial refuges from which hunted areas are repopulated,
following a source–sink dynamics. Sustainable use of Patagonian foxes warrants the design of a monitoring program in nature
reserves and areas subjec...
Estudios previos han demostrado que el tamaño corporal de zorros grises o chillas (Pseudalopex griseus) y colorados o culpeos (P. culpaeus) es similar en alopatría, y que en simpatría se produce una divergencia en el tamaño de ambos zorros. El aumento en la diferencia del tamaño corporal entre las dos especies hacia la porción más austral de su dis...
Previous studies have shown that body size of chillas (Pseudalopex griseus) and culpeo (P. culpaeus) foxes was similar when they ocurr allopatrically, whereas a divergence in body size is produced when both species are sympatric. The increase in body size differences between culpeos and chillas toward the southernmost portion of their distribution...
In this paper we show how new technologies can be incorporated from the gathering of field data on wildlife distribution to the final stage of producing distribution maps. We describe an integrated framework for conducting wildlife censuses to obtain data to build predictive models of species distribution that when integrated in a GIS will produce...
