Browsing by Autor "Julio Pinto"

Now showing 1 - 8 of 8

Dietary patterns and sympatry in Lake Titicaca (Bolivia): the role of seasonality in niche overlap between native Andean killifish
(Springer Science+Business Media, 2025) Erick Loayza; Arturo Muñoz‐Saravia; Julio Pinto; Carla Ibañez; Marc Pouilly; Geert Janssens
ESTRUCTURA DE MACROINVERTEBRADOS ACUÁTICOS EN UN RÍO ALTOANDINO DE LA CORDILLERA REAL, BOLIVIA: VARIACIÓN ANUAL Y LONGITUDINAL EN RELACIÓN A FACTORES AMBIENTALES
(2008) Carlos I. Molina; François‐Marie Gibon; Julio Pinto; Claudio Rosales
Este trabajo describe la estructura de la comunidad de macroinvertebrados acuáticos en un río altoandino de la cuenca amazónica boliviana. Se describe la variación anual y longitudinal en relación a factores ambientales. Este río libre de influencias antropogénicas, presenta una baja heterogeneidad longitudinal pero importantes variaciones de flujo. Además, como muchos ríos altoandinos, está alimentado y consecuentemente regulado por un glacial (Mururata). Este fenómeno decrece y está amenazado por la desaparición de los glaciales tropicales a causa del calentamiento global. Los efectos de la fauna podrían ser drásticos. Nuestros resultados muestran una baja riqueza de taxa de macroinvertebrados que sin embargo son abundantes, especialmente aquellas poblaciones que son permanentes: Baetidae (Andesiops peruvianus), Leptophlebiidae (Meridialaris tintinnabula), Gripopterygidae (Claudioperla tigrina), Simuliidae, Chironomidae y Oligochaeta. Mediante herramientas estadísticas de análisis multivariado, demostramos que la densidad y la riqueza de las poblaciones de macroinvertebrados están influenciadas por las variaciones de descarga hidráulica.
Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon
(Springer Science+Business Media, 2010) Carlos I. Molina; François‐Marie Gibon; Thierry Oberdorff; Eduardo Domı́nguez; Julio Pinto; Rubén Marín; Marc Roulet
Mercury compound-specific stable isotope fractionation in high-altitude lake ecosystems of the Bolivian Altiplano
(Elsevier BV, 2025) Jérémy Masbou; David Point; Sylvain Bouchet; Jeroen E. Sonke; Carlos A. Molina; Carla Ibañez; Anne Lorrain; Julio Pinto; Darío Achá; David Amouroux
Selection of macroinvertebrate metrics for rapid assessment of the human impact by biotic conditions of Bolivian Altiplano streams
(Elsevier BV, 2021) Carlos I. Molina; Julio Pinto; Darío Achá
The Hyalella (Crustacea: Amphipoda) species cloud of the ancient Lake Titicaca originated from multiple colonizations
(Elsevier BV, 2018) Sarah J. Adamowicz; María Cristina Marinone; Silvina Menu-Marque; Jeffrey W. Martin; Daniel C. Allen; Michelle Pyle; Patricio De los Ríos-Escalante; Crystal N Sobel; Carla Ibañez; Julio Pinto
Unveiling biogeographical patterns of the ichthyofauna in the Tuichi basin, a biodiversity hotspot in the Bolivian Amazon, using environmental DNA
(Public Library of Science, 2022) Cédric Mariac; Fabrice Duponchelle; Guido Miranda; Camila Ramallo; Robert B. Wallace; Gabriel Tarifa; Carmen Rosa GARCÍA-DÁVILA; Hernán Ortega; Julio Pinto; Jean‐François Renno
To date, more than 2400 valid fish species have been recorded in the Amazon basin. However, some regions remain poorly documented. This is the case in the Beni basin and in particular in one of its main sub-basins, the Tuichi, an Andean foothills rivers flowing through the Madidi National Park in the Bolivian Amazonia. The knowledge of its ichthyological diversity is, however, essential for the management and protection of aquatic ecosystems, which are threatened by the development of infrastructures (dams, factories and cities), mining and deforestation. Environmental DNA (eDNA) has been relatively little used so far in the Amazon basin. We sampled eDNA from water in 34 sites in lakes and rivers in the Beni basin including 22 sites in the Tuichi sub-basin, during the dry season. To assess the biogeographical patterns of the amazonian ichthyofauna, we implemented a metabarcoding approach using two pairs of specific primers designed and developed in our laboratory to amplify two partially overlapping CO1 fragments, one of 185bp and another of 285bp. We detected 252 fish taxa (207 at species level) among which 57 are newly identified for the Beni watershed. Species compositions are significantly different between lakes and rivers but also between rivers according to their hydrographic rank and altitude. Furthermore, the diversity patterns are related to the different hydro-ecoregions through which the Tuichi flows. The eDNA approach makes it possible to identify and complete the inventory of the ichthyofauna in this still poorly documented Amazon basin. However, taxonomic identification remains constrained by the lack of reference barcodes in public databases and does not allow the assignment of all OTUs. Our results can be taken into account in conservation and management strategies and could serve as a baseline for future studies, including on other Andean tributaries.
Using mixed methods to assess food security and coping strategies: a case study among smallholders in the Andean region
(Springer Science+Business Media, 2017) Georgina Limon; Guillaume Fournié; Elisa G. Lewis; Paula Domínguez-Salas; Daniela Leyton-Michovich; Eloy Gonzales-Gustavson; Armando E. González; Aurelio H. Cabezas; Julio Pinto; Jonathan Rushton