Browsing by Autor "Christian F Eulert"

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Evaluación de la diversidad de mamíferos medianos y grandes en el Parque Nacional Carrasco (Cochabamba - Bolivia)
(1998) Damián I. Rumiz; Christian F Eulert; Rosario Arispe
ASSESSING DIVERSITY OF LARGE AND MEDIUM SIZE MAMMALS IN THE CARRASCO NATIONAL PARK (COCHABAMBA - BOLIVIA) The diversity, distribution, relative abundance, and status of large and medium size mammals, in eight zones of the Carrasco National Park, were assessed with a rapid survey, based on animal signs, sightings, and questionnaires. A total of 67 km of transects, traversing tour major vegetation units ranging from 350 -4 200 m altitude, were surveyed on foot, recording animal tracks, scats, claw marks, and feeding signs. Based on 476 signs and sightings, 32 mammal species were identified and relative abundance was estimated. Riparian sites, ranging in altitude from 350 -2 300 m, showed higher species diversity and abundance than nearby non riparian sites. Highest diversity was registered in undisturbed humid lowland forest. Diversity decreased with altitude (or human presence), although, highlands contain unique and threatened species. Responses by local people to questionnaires increased to 52 the number of species for the park, 33 of which are subjected to hunting and 28 have some conservation status. The presence of important species such as Priodontes maximus, Speothos venaticus, Tremarctos ornatus, Pteronura brasiliensis, Lutra longicaudis, Panthera onca, LeQPardus pardalis, Leopardus wiedii, Oreailurus jacobita (perhaps Felis pajeros), Hippocamelus antisensis, and, possibly, Mazama chunyi was confirmed or reported. Key words: Mammals, animal signs, distribution, altitude, habitats, Carrasco National Park, Bolivia. RESUMEN A fin de evaluar la diversidad, distribucion, abundancia relativa y estado de los mamiferos medianos y grandes del Parque Nacional Carrasco, se realizo un relevamiento rapido basado en indicios y encuestas en ocho zonas del parque. Se recorrieron 67 km de transectas buscando huellas, excrementos, marcas y signos de alimentacion de animales a traves de cuarto unidades de vegetacion que abarcaban desde 350 -4 200 m de altitud. Se registraron 32 especies y se estimo su abundancia relativa en base a 476 indicios y observaciones. Los sitios riberenos, entre 350 -2 300 m de altitud, mostraron mas especies y con mayor abundancia que los sitios no riberenos cercanos. Los sitios mas diversos correspondieron a bosque humedo de llanura no disturbado, mientras que con la altitud (o presencia humana) la diversidad decrecio. Aunque menos diversas, las zonas altas presentaron especies unicas y amenazadas. Los cuestionarios aumentaron a 52 el numero total de especies, de las cuales 33 son objeto de caceria y 28 tienen alguna categoria de conservacion. Entre las mas notorias se inbJuyen Priodontes maximus, Speothos venaticus, Tremarctos ornatus, Pteronura brasiliensis, Lutra longicaudis, Panthera onca, Leopardus pardalis, Leopardus wiedii, Oreailurus jacobita (o tal vez Felis pajeros), Hippocamelus antisensis, y probablemente Mazama chunyi. Palabras clave: Mamiferos, indicios, distribucion, altitud, habitats, Parque Nacional Carrasco, Bolivia.
New records and a status assessment of a rare dwarf brocket deer from the montane forests of Bolivia
(Wiley, 2006) Damián I. Rumiz; Érica Verónica Pardo; Christian F Eulert; Rosario Arispe; Robert B. Wallace; Humberto Gómez; Boris Ríos-Uzeda
Abstract Two skeletons, tracks, faecal pellets, photographs and local reports are described and compared with the few previous records of dwarf Andean deer from Bolivia and Peru. Tarsal bones and incisor teeth were diagnostic traits for Mazama and not for Pudu , while skull measurements, ear shape, body colour and facial patterns were consistent with descriptions of Mazama chunyi . Twenty‐five new localities (including more than 60 sites in La Paz and Cochabamba) extended significantly the previously known range for M. chunyi in Bolivia. It occurs in Madidi, Apolobamba, Pilón Lajas, Cotapata, Carrasco and probably Isiboro Sécure protected areas, in habitats ranging from grasslands and Polylepis elfin forests of the ‘ceja de Yungas’ at 3600 m to sub‐Andean forests at 1000 m. A geographical information system modelled geographic distribution area based on altitude and ecological zone estimates a potential range of about 45 717 km 2 in Bolivia. About 36% of this range (or 41% of the extent of occurrence) is degraded and fragmented, but the rest seems to be in relatively good conservation status. Habitat decline and a limited area of occupancy estimated for Bolivia (and suspected for Peru) suggest that M. chunyi' s conservation status should be updated from Data Deficient to Vulnerable VU A4c; B2a+b(iii).