Alejandra Irene Roldán

Centro de Estudios en Biología Teórica y Aplicada

Citizen Science for the Amazon is a network of organizations collaborating to empower citizens and generate knowledge about the fish and aquatic ecosystems of the Amazon Basin. What are the main difficulties of the network in relation to the participation of local communities? How could the Cycle of Inquiry and Freirian Thematic Research provide so...

Evaluación de cambios en conocimiento ambiental a través de audiovisuales que emplean la metodología de "Senderos de Indagación" en público que utilizan autobuses (PumaKatari) de la ciudad de La Paz, Bolivia.

La presentación es un resumen muy corto de un vídeo en el cual se compara los cultivos con y sin quema, basándose en información teórica y práctica. El vídeo tiene una duración aproximada de 6 minutos y es de libre acceso. Particularmente apropiado para discutir en cursos avanzados de secundaria, cursos básicos de nivel universitario y para público...

Resumen El estado de conservación de las poblaciones de anfibios en Bolivia aún es poco conocido, y los estudios sobre su distribución, densidad, y amenazas son escasos para cada una de las especies. En el presente trabajo realizamos una evaluación del estado de conservación de la especie endémica boliviana Yunganastes bisignatus, incrementamos el...

Between the years 2000 and 2005, teachers from 39 schools of the municipality of Coroico (Bolivia) applied a research method called the Inquiry Cycle (IC) in their classrooms. In order to know the effect, in students and teachers, of the application of IC in the skills to design an investigation in the cation of IC in the skills to design an invest...

Entre los años 2000 a 2005, maestros de 39 escuelas del municipio de Coroico (Bolivia) aplicaron con sus estudiantes un método de investigación llamado Ciclo de Indagación (CI). Con el objetivo de conocer el efecto, en estudiantes y maestros, de la aplicación del CI en las habilidades para diseñar una investigación, en los cambios en el conocimient...

Evaluación del empleo del Ciclo de Indagación en escuelas rurales de Bolivia Assessment of the use of the Cycle of Inquiry in rural schools of Bolivia Avaliação do uso do Ciclo de Inquérito em escolas rurais da Bolívia En prensa: revista Praxis, Educación y Pedagogía (1)Correspondencia: aleiroldan@yahoo.com RESUMEN Entre los años 2000 a 2005, maest...

Comparamos dos tipos de recorridos guiados en el Museo Nacional de Historia Natural (La Paz, Bolivia) en relación a seis variables de respuesta medidas en grupos de estudiantes de 4º a 6º de primaria. Uno de los recorridos (GT) incluye una metodología tradicional de transmisión del conocimiento del guía al visitante. El otro recorrido (SI) utiliza...

We compared two types of guided visits to short trails at the Museo Nacional de Historia Natural (La Paz, Bolivia), in relation to six response variables measured in groups of 4th to 6th grade children. One of the trails followed the traditional way of guidance with knowledge transmission from the guide to the visitor (GT). The other one used the T...

El acopio esparcido ha recibido singular atención en las últimas décadas, y muchos estudios se han centrado en semillas de palmeras dispersadas por Dasyprocta. Nuestro objetivo fue identificar las especies consumidoras de frutos de Mauritia flexuosa, evaluar la importancia relativa de esas especies y el destino de las semillas dispersadas. Utilizam...

The taruka Hippocamelus antisensis, a species of deer categorized as Vulnerable on the IUCN Red List, was thought to be locally extinct in the environs of La Paz, Bolivia. However, local people from Mecapaca municipality reported seeing tarukas at their former community establishment, which had been abandoned several years previously. After confirm...

In rural landscapes across Latin America, local people are learning to apply firsthand scientific inquiry to answer their own questions about the ecol-ogy of place. Their investigations follow the scientific method of the ba-sic or applied inquiry cycle. In "community inquiry, " local residents such as subsistence farmers or fishermen propose their...

From January 2000 to March 2001 we evaluated aspects of temporal variation of activities, diet, and group size of an Ateles chamek population in an area of humid mountain forest (Estación Biológica Tunquini - EBT) in the Bolivian Yungas. We also evaluated (from April 2000) the availability of fruit species consumed by these primates. We found negat...

We compared species richness and abundance of birds between five patches under selective Alnus exploitation and five patches that have not been harvested for at least 10 years prior to our study, during the early dry season (April–July 2001), in Cotapata National Park. Using “point counts” we recorded birds and their distribution in two (<1.5 m and...

At the Beni Biological Station, Bolivia, we compared the fate of seeds of the palm Attalea phalerata dispersed by tapirs to a latrine with that of non-dispersed seeds. Survival of seeds that had passed through tapir guts did not differ significantly from that of unconsumed seeds, demonstrating that tapirs are legitimate seed dispersers of A. phaler...

We present two years (October 1998 - October 2000) of phenological data for 14 arboreal species whose fruits are consumed by frugivores, as the first phase of a larger phenological study underway in the Yungas Forest of the Parque Nacional y Área Natural de Manejo Integrado Cotapata (Bolivia). We recorded percentage of flower buds, flowers, predisp...

We studied plant-animal interactions and vegetation structure in two geographically close tropical Bolivian forests subjected to different hunting intensities. We hypothesized that reduction of mammals of >1 kg in an "intensively hunted forest," compared with art "occasionally hunted forest, " should correlate with decreased seed predation and seed...