Browsing by Autor "M. Isabel Galarza"

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    Characterization of caves as bat roosts in the brazilian-paranense biogeographic region of Bolivia
    (Asociacion Mexicana de Mastozoología A.C., 2020) Dennis Lizarro; Luís F. Aguirre; José Carlos Pérez-Zubieta; Aideé Vargas; M. Isabel Galarza
    Bats play vital roles in nature as pollinators, seed dispersers, and natural controllers of insect pests. They serve as indicators of habitat disturbance and provide an insight into the health status of an ecosystem. This enormous importance contrasts with the lack of information on the current state of their roosts in Bolivia, particularly as regards caves and caverns. A search for caves and caverns was carried out in the eastern department of Santa Cruz, Bolivia, corresponding to the Brazilian-Paranense biogeographic region. Subsequently, an environmental-structural characterization of the caves was conducted to obtain biological information by capturing and identifying bats in eastern Bolivia. Interspecific associations in caves and the relationship between roost characteristics and bat diversity were explored and described based on the variables evaluated. A total of 19 caves were evaluated. A correlation between environmental and structural parameters was investigated, showing a relationship between cave length and humidity. Seven species of cave bats were identified, and two species of threatened Bolivian bats (Lonchorhina aurita and Natalus macrourus) were found in four caves. The caves evaluated are new records of this vital habitat for bats in the country. The presence or absence of bat species was found to depend on the structural characteristics of the cave (length, complexity), but not on temperature, although humidity may play a role in the presence of species. Among the species found, those highly specialized in the selection and use of roosts at caves could be prone to local extinctions. It is suggested that further investigations should be carried out on the ecology of these cave-dwelling bat species to identify the roosting patterns of bats and their distribution range, to elaborate conservation and management programs for caves and the animal communities sheltered.
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    ENSAMBLE DE MURCIÉLAGOS EN SITIOS CON DIFERENTE GRADO DE PERTURBACIÓN EN UN BOSQUE MONTANO DEL PARQUE NACIONAL CARRASCO, BOLIVIA
    (2008) Aideé Vargas Espinoza; Luís F. Aguirre; M. Isabel Galarza; Edgar E. Gareca
    Assemblage of bats in sites with varying degrees of disturbance in montane forests of Carrasco National Park, Bolivia. Montane forests in Bolivia are characterized by sites with high biodiversity and endemism but are also faced by threats due to human activities, mainly agriculture. For a period of 11 months, we evaluated the effect of human disturbance due to traditional agricultural activities on bat communities in a montane forest in the foothills of the Santuario de Vida Silvestre Cavernas de Repechon, Carrasco National Park. We found that the total community contained 36 species based on a sample of 2518 individuals belonging to Phyllostomidae and Vespertilionidae. The most abundant species in all sites was Carollia perspicillata; in abandoned fields, young forest and mature forest C. brevicauda was the second most abundant species, whereas in agricultural lands Artibeus lituratus was the most common. Fruit-eating bats were the best represented trophic guild in terms of species and abundance. The sites with most similar species composition were abandoned fields and mature forests. Young forests were less similar to abandoned fields, and agricultural lands differed most from all other sites. Be- cause the study sites were small compared with the larger matrix consisting mostly of
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    Variación temporal de la quiropterofauna en un bosque de Yungas en Bolivia
    (Smithsonian Institution, 2008) M. Isabel Moya; Flavia Montaño‐Centellas; Luís F. Aguirre; Julieta Tordoya; Jesús Martínez; M. Isabel Galarza
    (Uploaded by Plazi for the Bat Literature Project) No abstract provided.