642 resultados para BIODIVERSIDAD


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Incluye Bibliografía

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Incluye Bibliografía

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Incluye hoja anexa en el documento impreso con correcciones de contenido y en signatura

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Incluye Bibliografía

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El cambio climático por sus impactos económicos, sociales y sobre la biodiversidad constituye uno de los principales retos globales de este siglo. América Latina por su alta vulnerabilidad al cambio climático y, a pesar de contribuir en términos relativos poco a las emisiones globales, requiere realizar medidas de adaptación y de mitigación de sus emisiones, que le permita transitar hacia una senda de crecimiento bajo en carbono. En este contexto, este trabajo tiene por objetivo identificar las estrategias de mitigación y adaptación más utilizadas en Perú, Bolivia, Colombia y Nicaragua, que contribuyan a generar una senda de crecimiento económico baja en emisiones de carbono.

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La evolución de las ideas y las políticas para el desarrollo / Gert Rosenthal. -- Políticas macroeconómicas para el crecimiento / Ricardo Ffrench-Davis. -- Flujos de capitales: lecciones a partir de la experiencia chilena / Eduardo Aninat, Christian Larraín. -- La transformación del desarrollo industrial de América Latina / José Miguel Benavente, Gustavo Crespi, Jorge Katz, Giovanni Stampo. -- Las reformas de las pensiones en América Latina y la posición de los organismos internacionales / Carmelo Mesa-Lago. -- Aportes de la antropología aplicada al desarrollo campesino / John Durston. -- Prospección de la biodiversidad: potencialidades para los países en desarrollo / Julie M. Feinsilver. -- La inversión extranjera y el desarrollo competitivo en América Latina y el Caribe / Alejandro C. Vera-Vassallo. -- La crisis del peso mexicano / Stephany Griffith-Jones.

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El cambio climático que ocurriría durante el siglo XXI va a afectar al sector agropecuario en Bolivia en muchas diferentes maneras. En el presente estudio se analizanno solo los efectos brutos iniciales del cambio climático sobre los rendimientos agrícolas, sino también los efectos netos permitiendo que ocurra una adaptación espontánea a través de la sustitución de cultivos. Adicionalmente, se incluye el efecto de la fertilización de CO2, el efecto de aumentos en la frecuencia de eventos extremos, el efecto de cambios en el nivel de biodiversidad y servicios eco-sistémicos que sostienen el sector, y el efecto de cambios en la disponibilidad de agua para riego. Finalmente, además de estos efectos directos se estiman los efectos indirectos y dinámicos usando un modelo de equilibrio general computable que realiza simulaciones hasta el año 2100.

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The Amazon region has a large sociobiodiversity, where lives people with traditional knowledge about the uses of its natural resources. The Convention on Biological Diversity (CBD) in 1992 recognized the autonomy of each nation over its genetic resources and the rights of traditional populations about the knowledge of the use of these natural resources. In 2001 it was published the law M.P. 2.186-16/2001 which created the Conselho Nacional de Gestão do Patrimônio Genético (CGEN) and the first rules about access to genetic resources and associated traditional knowledge in Brazil. Since his creation, the actions of CGEN have received criticism from various sectors, both private and public, and, unlike its initial proposal, has become one of the main obstacles of ethnobotanical studies, the bureaucracy, the long process analysis and communication difficulties with this organ.

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Life-history information constitutes the raw data for building population models used in species conservation. We provide life-history data for the endangered Santa Catalina Island Rattlesnake, Crotalus catalinensis. We use data from 277 observations of C. catalinensis made between 2002 and 2011 on the island. Mean snout-vent length (SVL) of adult C. catalinensis was 643 mm for males and 631 mm for females; the difference was not significant. The degree of sexual size dimorphism (SSD; using SVL) was -0.02. However, sexes were dimorphic in total length ( SVL + tail length), relative tail length, and stoutness. Juvenile recruitment occurs during late-summer. In their first year of life, juveniles seem to grow at a rate of about 1.7 cm/mo. Females seem to become mature around 570 mm SVL, probably in the year when they become 2 y old. Scattered literature data corroborates the time of juvenile recruitment described herein. Growth in C. catalinensis seems to be slower than that of C. ruber, its sister taxa, but similar to other rattlesnakes.

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We revisit species diversity within Oreobates (Anura: Strabomantidae) by combining molecular phylogenetic analyses of the 16S rRNA amphibian barcode fragment with the study of the external morphology of living and preserved specimens. Molecular and morphological evidence support the existence of 23 species within Oreobates, and three additional candidate species (Oreobates sp. [Ca JF809995], Oreobates sp. [Ca EU368903], Oreobates cruralis [Ca EU192295]). We describe and name three new species from the Andean humid montane forests of Departamento Cusco, southern Peru: O. amarakaeri New Species from Rio Nusinuscato and Rio Mabe, at elevations ranging from 670 to 1000 m in the Andean foothills; O. machiguenga, new species, from Rio Kimbiri (1350 m), a small tributary of the Apurimac River, in the western versant of Cordillera Vilcabamba; and O. gemcare, new species, from the Kosnipata Valley at elevations ranging from 2400 to 2800 m. The three new species are readily distinguished from all other Oreobates by at least one qualitative morphological character. Three species are transferred to Oreobates from three genera of Strabomantidae: Hypodactylus lundbergi, Pristimantis crepitans, and Phrynopus ayacucho (for which the advertisement call, coloration in life, and male characteristics are described for first time). Oreobates simmonsi is transferred to the genus Lynchius. Hylodes verrucosus is considered a junior synonym of Hylodes philippi. In addition, H. philippi is removed from the synonymy of O. quixensis and considered a nomem dubium within Hypodactylus. The inclusion of Phrynopus ayacucho in Oreobates extends the ecological range of the genus to the cold Andean puna. Oreobates is thus distributed from the Amazonian lowlands in southern Colombia to northern Argentina, reaching the Brazilian Atlantic dry forests in eastern Brazil, across an altitudinal range from ca. 100 to 3850 m.