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Reproductive Patterns And Human-influenced Behavior In Brown Bears: Implications For The Conservation Of Large Carnivores

Andrés Ordiz Fernández
Published 2011 · Geography

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Los objetivos de esta tesis fueron 1) mejorar un metodo de seguimiento de poblaciones de oso pardo (Ursus arctos) basado en el conteo de osas con crias, incluyendo un estudio sobre patrones de reproduccion, y 2) explorar algunos efectos de actividades humanas sobre el comportamiento de los grandes carnivoros, con los osos como especie modelo. Seis de los trabajos fueron descriptivos, basados en datos empiricos, y sus resultados esenciales, en relacion con los objetivos expuestos, son los siguientes: 1) En relacion a las osas con crias, el estudio mejoro los criterios basados en distancias entre observaciones para distinguir grupos familiares, y resalto la necesidad de interpretar con cautela tendencias de la poblacion basadas en el conteo de osas con crias. Ademas, los resultados mostraron la existencia de un patron espacial y temporal de la reproduccion, sugiriendo que las interacciones entre individuos y el comportamiento en carnivoros solitarios pueden jugar un papel mas importante en las dinamicas poblacionales de lo que se viene suponiendo. 2) Los osos mostraron una respuesta comportamental concreta a las actividades humanas, tanto a escala estacional como diaria, que recuerda a las sensibles respuestas de las presas respecto a sus predadores. Parece que los osos utilizan la cobertura de la vegetacion y la distancia a asentamientos humanos como medios para evitar encuentros con gente, y modifican sus patrones de movimiento cuando comienza la temporada de caza. El ultimo manuscrito liga perspectivas demograficas y de comportamiento de la persecucion humana sobre los grandes carnivoros, discutiendo que esta afecta no solo a los carnivoros, sino probablemente tambien al papel regulador que ellos pueden desempenar en los ecosistemas
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