Browsing by Author "Jaksic Andrade, Fabián"
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- ItemA Long-Term Study of Vertebrate Predator Responses to an El Niño (ENSO) Disturbance in Western South America(1997) Jaksic Andrade, Fabián
- ItemA Long-Term Study on the Dynamics of Guild Structure Among Predatory Vertebrates At a Semiarid Neotropical Site(1993) Jaksic Andrade, Fabián
- ItemA metabolic view of amphibian local community structure: the role of activation energy(2018) Canavero, Andrés; Arim, Matías; Pérez, Fernanda; Jaksic Andrade, Fabián; Marquet, P. A. (Pablo A.)
- ItemA synthesis of ENSO effects on drylands in Australia, North America and South America(2006) Holmgren, M.; Jaksic Andrade, Fabián; Lima Arce, Mauricio
- ItemAcacia caven nurses endemic sclerophyllous trees along a successional pathway from silvopastoral savanna to forest(2017) Root-Bernstein, Meredith; Valenzuela, Rafael; Huerta, Margarita; Armesto, Juan J.; Jaksic Andrade, Fabián
- ItemAltitudinal Zonation Among Lizards of the Genus Liolaemus: Questions Answered and Unanswered Questions(2001) Carothers, J.; Jaksic Andrade, Fabián; Marquet, P. A. (Pablo A.)
- ItemAntecedentes de la invasión de la especie exótica Lycalopex griseus (Zorro Gris o Chilla) en Isla Grande de Tierra del Fuego, Chile(2021) Zurita Redón, Carlos Nicolás Felipe; Jaksic Andrade, Fabián; Pontificia Universidad Católica de Chile. Facultad de Ciencias BiológicasSe realiza una recopilación bibliográfica de los datos sobre la invasión de Lycalopex griseus (Zorro Gris) en la Isla Grande de Tierra del Fuego con el objetivo de describir y analizar los antecedentes publicados sobre la introducción, invasión y efectos de Lycalopex griseus en dicho lugar. Se sabe que este cánido fue introducido en la Isla en 1951 de manera voluntaria para ejercer un control biológico sobre las poblaciones de Conejo Europeo (Oryctolagus cuniculus) que, a esa fecha, se estimaban sobre 30 millones de individuos. Este lagomorfo vio disminuida sus abundancias poblacionales a raíz de la introducción de la enfermedad viral mixomatosis que provocaba su muerte, en tanto que el Zorro Gris comenzó a aumentar sus abundancias sin haber ejercido eficazmente su rol putativo de controlador biológico. Para esto, se hace una revisión con ayuda de Google Académico y algunos criterios de búsqueda para encontrar literatura al respecto. Se evidencia que esta es escasa, y aporta datos antiguos que requieren actualización. Entre los datos recopilados, destacan antecedentes sobre su nicho trófico, donde se muestra que este cánido incorpora ítems dietarios diversos, como vegetales y micromamíferos; además, datos sobre sus poblaciones que muestran los sectores de la isla donde con mayor probabilidad de avistamiento de Zorros Grises. En conclusión, se hacen necesarios nuevos esfuerzos de muestreo para actualizar la información y resolver otras incógnitas que han sido planteadas en la literatura por años, como la eficacia y eficiencia de los zorros como controladores biológicos de conejos.
- ItemAre Latin American ecologists recognized at the world level? A global comparison(2021) Rau Acuña, Jaime; Jaksic Andrade, FabiánAbstract Background Ioannidis et al. (2020) reported a standardized estimate of scientific productivity obtained from a worldwide database of 6,880,389 scientists who published at least 5 papers picked up by the Scopus database, and elaborated a ranking of ca. 120,000 scientists by both whole trajectory (career-long) impact and their current impact at year 2019. The goal of our paper is to contextualize Latin American ecologists’ contribution at the world level based on the four most scientifically productive countries in the region. Methods and findings Ioannidis et al. (2020) proposed a composite index that is the sum of six scientometric indicators: (1) The number of allocites, (2) the h index, (3) a per capita corrected version of h, (4) the allocites received as single author, (5) those received as single + first author, and (6) those as single + first + last author. We selected data for ecologists from Argentina, Brazil, Chile, and Mexico and comparatively analyzed their productivity according to the proposed index. We also compared these data with those obtained from a global sample of the top ecologists worldwide. Conclusions Based on Ioannidis et al.’s proposition to evaluate scientific productivity we extract three lessons: (1) It does not pay to publish many papers; what counts is the number of allocites (i.e., self-citations do not add up). (2) Either be single, first, or last author; it does not pay to be in the middle of an authorship line. (3) Even worse it is to be among many co-authors because the proposed index allocates credits on a per capita basis.
- ItemAssessing the Relative Contribution of Functional Divergence and Guild Aggregation to Overall Functional Structure of Species Assemblages(2006) Farías Piccolini, Ariel Alejandro; Jaksic Andrade, Fabián
- ItemBet-hedging strategies of native and exotic annuals promote coexistence in semiarid Chile(2016) Kelt, D.; Gutiérrez, J.; Jaksic Andrade, Fabián; Jiménez, M.; Gaxiola Alcantar, Aurora; Armesto, Juan J.; González Browne, C.; Meserve, P.
- ItemBody mass dynamics and growth patterns of leaf-eared mice Phyllotis darwini in a semi-arid region of the Neotropics(1997) Lima Arce, Mauricio; Bozinovic Kuscevic, Francisco; Jaksic Andrade, Fabián
- ItemCambios de largo plazo en el paisaje y los ensambles de micromamíferos y rapaces en Chile central(2010) Pavez, E. F.; Lobos Villalobos, Gabriel Antonio; Jaksic Andrade, Fabián
- ItemComparisons of Terrestrial Vertebrate Assemblages in Temperate Rainforests of North and South America(1991) Meserve, P.; Jaksic Andrade, Fabián
- ItemComposition, Size and Dynamics of the Seed Bank in a Mediterranean Shrubland of Chile(2004) Figueroa, J.; Jaksic Andrade, Fabián
- ItemLa Contribución de Darwin al Conocimiento de los Vertebrados Terrestres de Chile(1994) Jaksic Andrade, Fabián
- ItemDemographic dynamics of a neotropical small rodent (Phyllotis darwini): feedback structure, predation and climatic factors(2001) Lima Arce, Mauricio; Jaksic Andrade, Fabián
- ItemDemography and population dynamics of the mouse opossum (Thylamys elegans) in semi-arid Chile: seasonality, feedback structure and climate(2001) Lima Arce, Mauricio; Jaksic Andrade, Fabián
- ItemDensity, abundance, and activity of the chilla or grey fox (Lycalopex griseus) in Isla Grande de Tierra del Fuego, Chile(2024) Zurita Redón, Carlos Nicolás Felipe; Oporto, Javier; Valverde, Ignacio; Bernales, Borja; Soto, Nicolás; Rau, Jaime R.; Jaksic Andrade, FabiánBackground: The chilla or grey fox (Lycalopex griseus) is a native species from continental Chile and neighboring areas of Argentina. It was introduced to Isla Grande de Tierra del Fuego in 1951 and began to increase its abundance, to the chagrin of local sheep ranchers. Since 1998, its hunting has been authorized. Here we update information on the density, abundance, and activity of this fox in the Chilean sector of Tierra del Fuego Island, to evaluate its population trend since the last census conducted by the Servicio Agrícola y Ganadero (SAG) in 2007. Methods and results: We carried out two fox censuses on a 941-km transect on public roads, divided into eight routes, from October to November (spring) of 2021 and 2022, following the same design used by SAG for the fox assessments carried out from 1999 to 2007. We report a reduction of>50% in the density and abundance of chilla foxes with respect to the 2007 estimate, which could be attributed to the interference by free-ranging dogs (Canis lupus familiaris), through restricting the use of space by the fox, while transmitting diseases and parasites, and to human hunting pressure and vehicle collisions. Discussion: The chilla fox decline highlights the need for an in-depth study to determine the ecological and socioeconomic impact of this exotic species on the ecosystems of Tierra del Fuego Island and the desirability of its management, if needed.
- ItemDiet of the Racerunner Callopistes Palluma in North-Central Chile(1991) Castro Morales, Sergio; Jiménez Hott, Jaime; Jaksic Andrade, Fabián