974 resultados para Spanish imperial eagle
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Raptors that consume game species may ingest lead fragments or shot embedded in their prey's flesh. Threatened Spanish imperial eagles Aquila adalberti feed on greylag geese in southern Spain in winter, and often ingest lead shot. We analysed bone and feather samples from 65 Spanish imperial eagle museum specimens collected between 1980 and 1999, to investigate the prevalence of elevated lead concentrations. Four of 34 birds (12%) had very elevated bone lead concentrations. All four birds were young and the concentrations were outliers to the distribution, suggesting probable exposure to lead gunshot. Excluding these elevated lead outliers, bone lead concentrations were correlated with the bird's age at death. Three of 41 feathers (7%) had elevated lead concentrations, indicative of high exposure during feather formation. When these outliers were omitted, feather lead concentration was correlated with the age of museum specimens, suggesting that a high proportion of feather lead was exogenous, deposited after specimen collection. Therefore, careful interpretation of feather lead concentrations is required to separate endogenous and exogenous lead. We discuss the potential significance of lead poisoning in Spanish imperial eagles and other raptors, and recommend measures for its reduction. © 2004 Elsevier Ltd. All rights reserved.
Seropositivity and Risk Factors Associated with Toxoplasma gondii Infection in Wild Birds from Spain
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Toxoplasma gondii is a zoonotic intracellular protozoan parasite of worldwide distribution that infects many species of warm-blooded animals, including birds. To date, there is scant information about the seropositivity of T. gondii and the risk factors associated with T. gondii infection in wild bird populations. In the present study, T. gondii infection was evaluated on sera obtained from 1079 wild birds belonging to 56 species (including Falconiformes (n = 610), Strigiformes (n = 260), Ciconiiformes (n = 156), Gruiformes (n = 21), and other orders (n = 32), from different areas of Spain. Antibodies to T. gondii (modified agglutination test, MAT titer ≥1:25) were found in 282 (26.1%, IC95%:23.5–28.7) of the 1079 birds. This study constitute the first extensive survey in wild birds species in Spain and reports for the first time T. gondii antibodies in the griffon vulture (Gyps fulvus), short-toed snake-eagle (Circaetus gallicus), Bonelli's eagle (Aquila fasciata), golden eagle (Aquila chrysaetos), bearded vulture (Gypaetus barbatus), osprey (Pandion haliaetus), Montagu's harrier (Circus pygargus), Western marsh-harrier (Circus aeruginosus), peregrine falcon (Falco peregrinus), long-eared owl (Asio otus), common scops owl (Otus scops), Eurasian spoonbill (Platalea leucorodia), white stork (Ciconia ciconia), grey heron (Ardea cinerea), common moorhen (Gallinula chloropus); in the International Union for Conservation of Nature (IUCN) “vulnerable” Spanish imperial eagle (Aquila adalberti), lesser kestrel (Falco naumanni) and great bustard (Otis tarda); and in the IUCN “near threatened” red kite (Milvus milvus). The highest seropositivity by species was observed in the Eurasian eagle owl (Bubo bubo) (68.1%, 98 of 144). The main risk factors associated with T. gondii seropositivity in wild birds were age and diet, with the highest exposure in older animals and in carnivorous wild birds. The results showed that T. gondii infection is widespread and can be at a high level in many wild birds in Spain, most likely related to their feeding behaviour.
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El ser humano nunca ha tenido una capacidad semejante a la actual para alterar el medio en el que vive. A través fundamentalmente de cambios en el uso del hábitat, alteración de los ciclos biogeoquímicos, cambio climático y presencia de especies invasoras, la tasa de extinción de especies se ha acelerado enormemente. Al crecer más rápido la población humana dentro de las áreas en las que se concentra una mayor biodiversidad (biodiversity hotspots), las tasas de transformación son mayores, por lo que dicha biodiversidad se encuentra más amenazada. Entre los principales 25 biodiversity hotspots globales se encuentra la cuenca mediterránea. Las afecciones a la biodiversidad hacen por tanto que en dicha cuenca mediterránea sea necesario poner en práctica iniciativas innovadoras para su conservación. Pero además de una cuidadosa selección, es necesario el seguimiento y la evaluación de la eficacia y la eficienca de dichas medidas, para comprobar su idoneidad y mejorarlas cuando sea posible. Esta es la tarea de la ingeniería de la conservación. Esta Memoria busca analizar y proponer mejoras en cuatro acciones experimentales de conservación de la biodiversidad que tienen un marco común, la conservación de especies subrogadas del monte mediterráneo. En concreto de cinco especies amenazadas: conejo de monte (Oryctolagus cuniculus, especie llave), águila imperial ibérica (Aquila adalberti), águila perdicera (Aquila fasciata), cigüeña negra (Ciconia nigra) y lince ibérico (Lynx pardinus), todas ellas especies paraguas y bandera. Casi todas estas especies se enfrentan a amenazas comunes, como son la pérdida de la calidad del hábitat, la mortalidad de origen humano, la escasez de alimento o la falta de eficiencia en las técnicas de seguimiento. Las acciones destinadas a revertir o minimizar estas amenazas han tenido un marco geográfico y ecológico común, 49 fincas privadas de monte mediterráneo situadas en 9 espacios de la Red Natura 2000 del centro-occidental peninsular, en las que se ha podido trabajar merced a acuerdos de custodia del territorio. Dichas actividades han sido financiadas casi por completo con cargo a fondos LIFE Naturaleza de la Comisión Europea. El presente documento contribuye a aportar el conocimiento científico imprescindible para mejorar la eficacia y eficiencia de las medidas técnicas de gestión y conservación: la ingeniería de la conservación. Como resultados más relevantes se pueden citar que la selección del conejo de las zonas sembradas aumenta con la presencia tanto de isletas de matorral como de refugios y resulta inferior en las zonas de matorral más cerrado; que la electrocución es una de las principales causas de mortalidad de las rapaces amenazadas, así como que se ha detectado que la mortalidad se concentra en determinadas zonas que deben ser prioritarias para su corrección y que éstas deben pasar por las modificaciones estructurales; que la selección de zonas de alimentación por parte de la cigüeña negra se ve afectada por numerosos factores y que una adecuada ubicación y gestión de las charcas para ganadería y caza mayor puede favorecer no sólo la alimentación de esta especie, sino suponer un lugar de cría para diversas especies de anfibios y peces autóctonos, en franco declive; finalmente, hay que destacar que la mejora en el seguimiento de las poblaciones de lince ibérico pasa por la incorporación de métodos de seguimiento novedosos, como las cámaras infrarrojas en letrinas, dada la capacidad de aprendizaje de la especie. Abstract Nowadays the human being has reached its top ability to exchange its environment. Mainly through habitat change, altering biogeochemical cycles, climatic change and alien species, global extinction rate has increased dramatically. Population increases faster in biodiversity hotspots, thus change rates are higher. Mediterranean basin is included within the 25 most valuable biodiversity hotspots. Affections on biodiversity turns necessary to develop innovative actions to maintain the most threatened species in this hotspot. But further than a careful selection and implementarion, survey and evaluation of those practices is necessary to check its suitability. Those are actions for the conservation engineering. This Memory looks for to analyze and to put forward improvements in four experimental biodiversity conservation actions with a common framework: conservation of surrogate Mediterranean species. Those actions were specifically directed to five threatened species: the European wild rabbit (Oryctolagus cuniculus, key species), Spanish imperial eagle (Aquila adalberti) and Bonelli’s eagle (Aquila fasciata, both of the umbrella and flagship species), black stork (Ciconia nigra, umbrella and flagship species) and the Iberian lynx (Lynx pardinus, umbrella and flagship species). Those species have common threats: habitat loss, maninduced mortality, food shortening and lack of surveying efficiency. Actions aimed to minimize those threats also had a common geographical frame: 49 privately owned states within 9 Natura 2000 areas in Southwestern Spain. Actions were developed through lands tewardship agreements, and were even wholly undertaken through European Commision LIFE’s fund. This document contributes to develop cientific knowledge necessary for increasing efficacy and efficiency for implementing technical measures devoted to conservation, the conservation engineering. One of the most outstanding result might be the necessity of including bushy islets or rabbit shelter within sowings when enhacing rabbit populations is the goal. Electrocution is one of the commonest man-induced death causes for raptors, especially for the threatened ones. Areas of concentration of this mortality have been detected, and when mitigation measures have been evaluated, only structural modifications had results. The black stork’s selection of feeding areas is influenced by several factors. An adequate location and management of livestock’s ponds can favour not only this species, but also creating new breeding places for amphibians and indigenous fish species, most of them in a sharp decline. Finally, improving the survey of the Iberian lynx might be achieved through implementing newly developed surveying systems, such as the infrared cameras in latrines.
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BACKGROUND Most European birds of prey find themselves in a poor state of conservation, with electrocution as one of the most frequent causes of unnatural death. Since early detection of electrocution is difficult, treatment is usually implemented late, which reduces its effectiveness. By considering that electrocution reduces tissue temperature, it may be detectable by thermography, which would allow a more rapid identification. Three individuals from three endangered raptor species [Spanish imperial eagle (Aquila adalberti), Lammergeier (Gypaetus barbatus) and Osprey (Pandion haliaetus)] were studied thermographically from the time they were admitted to a rehabilitation centre to the time their clinical cases were resolved. CASES PRESENTATION The three raptors presented lesions lacking thermal bilateral symmetry and were consistent with electrocution of feet, wings and eyes, visible by thermography before than clinically; lesions were well-defined and showed a lower temperature than the surrounding tissue. Some lesions evolved thermally and clinically until the appearance of normal tissue recovered, while others evolved and became necrotic. A histopathological analysis of a damaged finger amputated off a Lammergeier, and the necropsy and histopathology examination of an osprey, confirmed the electrocution diagnosis. CONCLUSIONS These results suggest that thermography is effective and useful for the objective and early detection and monitoring of electrocuted birds, and that it may prove especially useful for examining live animals that require no amputation or cannot be subjected to invasive histopathology.
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Senior thesis written for Oceanography 444
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Senior thesis written for Oceanography 445
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World War I Memorial Plaque (17 ½ cm in diameter). This is a bronze plate encased in a 26 ½ cm x 24 cm wooden frame. The inscription on the plate is “He died for freedom and honour, Samuel DeVeaux Woodruff”. [In 1916 the British Government decided to issue a memorial plaque to be given to the relatives of those who died in the Great War. On the plaque is a figure of Britannia who is facing left and holding a laurel wreath over the box where the serviceman’s name is placed. In her right hand she holds a trident which represents Britain’s sea power. There are 2 dolphins facing her on her left and right hand sides. A lion stands in front of her. He faces left with a menacing growl. A very small lion that faces right is located below the larger lion’s feet. He is biting into a winged creature which represents the German Imperial eagle. Near the lion’s right paw there are the initials E CR P which stand for Mr. E. Carter Preston who designed the plate. Some of the plaques include a stamped batch number in front of the lion’s rear left paw. This plaque was produced in batch 17].
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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El presente artículo trata de ofrecer una lectura estética y política de la Antología de la poesía hispanoamericana que publicara Leopoldo Panero entre 1944 y 1945 bajo protección gubernamental. Para ello se parte de la particular biografía del escritor astorgano, su relación en los años treinta con los poetas hispanoamericanos –especialmente Vallejo y Neruda– y su gira por América ya como supuesto prohombre del régimen franquista en 1949 y 1954. La lectura sistemática de sus prólogos y selección de poetas revela la particular visión de Panero sobre Hispanoamérica, mediatizada por el concepto imperial de Falange pero formulada bajo su propia visión de lo que la lírica americana representa para la lengua castellana. Se sostiene así en estas líneas la tesis de que los postulados de Panero representan, a pesar de todo, una opción mucho más compleja de lo que se suele considerar.
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Este ensayo examina la naturaleza jurídica y política del imperio español en América y sus orígenes medievales. Con el fin de ofrecer un nuevo enfoque para estudiar la relación entre España y sus posesiones americanas, este trabajo propone una revisión de la tradición jurídica española. El estudio de la evolución de los conceptos de soberanía, representación y jurisdicción permite dilucidar los elementos constitutivos de las relaciones entre las diversas entidades políticas como mecanismo de comprensión del desarrollo de la cultura política de América Latina. De acuerdo a las características del sistema jurídico político en la época virreinal, la dispensación de la justicia y la práctica judicial constituyeron el eje de las relaciones entre la autoridad imperial y sus periferias. El artículo sostiene que la práctica judicial estuvo llena de sentido político y se convirtió en un medio de inclusión y representación.
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Los mármoles comerciales "Marrón Imperial" y "Marrón Emperador" son dolomías brechoides que de acuerdo con la clasificación del MIA pertenece al Grupo C de mármoles comerciales. Se determinan sus parámetros petrofísicos según la norma UNE. Sus rasgos petrológicos se estudian mediante microscopio petrográfico de luz transmitida y microscopio electrónico de barrido (MEB) (en modo de electrones secundarios y electrones retrodispersados). Estas rocas son básicamente dolomías mesocristalinas con abundantes vénulas calcíticas politexturales relacionadas con procesos de brechificación y de dolomitización. Rasgos kársticos aumentan la complejidad petrológica de estas rocas ornamentales cuyo litosoma son las dolomías masivas del Cretácico Superior (¿Turoniense?) del dominio Prebético Externo. El material explotado pertenece a una alineación morfoestructural que va desde Jumilla hasta el NE de Caudete y está relacionado con la falla Jumilla-Yecla-Caudete-Font de la Figuera. La relación entre esta falla y las dolomías turonienses son el principal criterio de exploración de estas rocas ornamentales.
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This thesis examines the manufacture, use, exchange (including gift exchange), collecting and commodification of German medals and badges from the early 18th century until the present-day, with particular attention being given to the symbols that were deployed by the National Socialist German Workers’ Party (NSDAP) between 1919 and 1945. It does so by focusing in particular on the construction of value through insignia, and how such badges and their symbolic and monetary value changed over time. In order to achieve this, the thesis adopts a chronological structure, which encompasses the creation of Prussia in 1701, the Napoleonic wars and the increased democratisation of military awards such as the Iron Cross during the Great War. The collapse of the Kaiserreich in 1918 was the major factor that led to the creation of the NSDAP under the eventual strangle-hold of Hitler, a fundamentally racist and anti-Semitic movement that continued the German tradition of awarding and wearing badges. The traditional symbols of Imperial Germany, such as the eagle, were then infused with the swastika, an emblem that was meant to signify anti-Semitism, thus creating a hybrid identity. This combination was then replicated en-masse, and eventually eclipsed all the symbols that had possessed symbolic significance in Germany’s past. After Hitler was appointed Chancellor in 1933, millions of medals and badges were produced in an effort to create a racially based “People’s Community”, but the steel and iron that were required for munitions eventually led to substitute materials being utilised and developed in order to manufacture millions of politically oriented badges. The Second World War unleashed Nazi terror across Europe, and the conscripts and volunteers who took part in this fight for living-space were rewarded with medals that were modelled on those that had been instituted during Imperial times. The colonial conquest and occupation of the East by the Wehrmacht, the Order Police and the Waffen-SS surpassed the brutality of former wars that finally culminated in the Holocaust, and some of these horrific crimes and the perpetrators of them were perversely rewarded with medals and badges. Despite Nazism being thoroughly discredited, many of the Allied soldiers who occupied Germany took part in the age-old practice of obtaining trophies of war, which reconfigured the meaning of Nazi badges as souvenirs, and began the process of their increased commodification on an emerging secondary collectors’ market. In order to analyse the dynamics of this market, a “basket” of badges is examined that enables a discussion of the role that aesthetics, scarcity and authenticity have in determining the price of the artefacts. In summary, this thesis demonstrates how the symbolic, socio-economic and exchange value of German military and political medals and badges has changed substantially over time, provides a stimulus for scholars to conduct research in this under-developed area, and encourages collectors to investigate the artefacts that they collect in a more historically contextualised manner.
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Little information is available on the patterns of genetic connectivity in owls. We studied the genetic structure of the eagle owl Bubo bubo (Linnaeus, 1758) in southeastern Spain at two different spatial scales. Seven microsatellites previously described for this species were used, although only six loci amplified correctly. The observed low genetic variation could be explained by the short dispersal distance, high mortality rate and high degree of monogamy shown by this large nocturnal predator. As expected, the highest genetic isolation was detected in the geographically most isolated population. Significant genetic differentiation was found among study units separated by less than 50 km. The territorial analysis showed interesting connectivity patterns related with the gene flow and turnover rate of the breeding individuals. The lowest genetic diversity was found in the region with the largest population, which could imply incipient inbreeding.
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In 1995 and 1997, two major Australian expeditions travelled to Antarctica. They were the most heavily-reported Antarctican events of their two years: they were charged with the public production of Australian Antarctic spatiality. Both published exploration narratives: Don and Margie McIntyre’s Expedition Icebound generated an illustrated coffee-table book, Two Below Zero: A Year Alone in Antarctica, and the Spirit of Australia South Pole Expedition published its narrative as a video titled Walking on Ice: The History-Making Expedition to the South Pole. Yet, despite the fact that the two polar trips took place during the same period, their spatialities are markedly different. Walking on Ice is a mobile narrative of imperial exploration, while Two Below Zero is a static spatial story of colonial settlement. How polar mobility and relative immobility figure in Australia’s perceptions of, and claim to, nearly half of Antarctica is the focus of this chapter.