Herpetofauna de la Reserva Nacional de fauna altoandina Ulla ULLa, Departamento de La Paz (Bolivia)

Abstract

HERPETOFAUNA OF THE HIGHANDEAN FAUNA RESERVE OF ULLA ULLA, DEPARTMENT OF LA PAZ (BOLIVIA) Se realiza un diagnostico de la hepetofauna presente en la RNF-UU, situada al centro oeste del departamento de La Paz, con un variacion altitudinal que va desde los 1 500 hasta los 6200 m y una extension de 240 000 ha. La evaluacion de 22 localidades dentro de las ecoregiones piso altoandino semihumedo, pradera paramica humeda de alta montana, ceja de Yungas y bosque seco caducifolio-monte espinoso, registra la presencia de 11 especies de reptiles y anfibios, de las cuales Phrynopus sp. es nuevoa para Bolivia, Telmatobius sp. y Leptodactylus rhodonotus, son nuevos para el departamento. Se registro tambien la presencia de una poblacion de anfibios de la especie endemica Hyla charazani, despues de 25 anos de la cita original. Para cada especie se determino su abundancia relativa, presencia por tipo de habitat y problemas de conservacion, siendo la actividad minera la que afecta mas a la anurofauna. Para la conservacion de la mayoria de las especies registradas, la RNF-UU es la unica alternativa actual en Bolivia. La futura ampliacion de esta Reserva y su transformacion en Area Natural de Manejo Integrado Apolobamba, permitira la inclusion de la ecoregion bosque humedo de Yungas, pudiendo proteger por lo menos otras 15 especies. Palabras clave: Ulla Ulla, nuevos registros, Hyla Charazani, zona Altoandina, Departamento de La Paz, Bolivia. ABSTRACT The herpetofauna present in the National Fauna Reserve Ulla Ul/a (NFR-UU), located in the mid west of the Department of La Paz, was studied. The reserve extends over an area of 240 000 ha. with altitudes between 1 500 -6200 m. This survey ncluded 22 areas of study covering the semi-humid high Andes, the high mountain humid paramic prairie, the Yungas Ceja (clearing), and the deciduous dry forest-thorn brushwood eco regions. A total of 11 reptile and amphibian species were recorded. Of these species, Phrynopus sp. is a new species for Bolivia and Telmatobius sp. and Lepthodactylus rhodonotus are new for the Department of La Paz. Additional population of the endemic species of amphibians, Hyla charazani, were found 25 years alter the original reporto For each species, relative abundance, habitar type, and conservation status were determined. It was concluded that mining causes most harm to the anurofauna.The NFR-UU is the only current alternative for the conservation of most of the species recorded. A future extension of the reserve and an new categorization as the Apolobamba Natural Area for Integrate Management will include the eco region of the humid forest of the Yungas, adding at least 15 more species of herpetofauna to be protected. Keywords: Ulla Ulla, new records, Hyla Charazani, High-Andes, Department of La Paz, herpetofauna, Bolivia.