Browsing by Autor "Fernando Trujillo"

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    Conservación y tráfico de la tortuga matamata, <i>Chelus fimbriata</i> (Schneider, 1783) en Colombia: un ejemplo del trabajo conjunto entre el Sistema Nacional Ambiental, ONG y academia
    (2018) Carlos A. Lasso; Fernando Trujillo; Mónica A. Morales-Betancourt; Laura Amaya; Susana Caballero; Beiker Castañeda
    Se presentan los resultados de una iniciativa interinstitucional (Corpoamazonia, Corporinoquia, Instituto Humboldt, Universidad de Los Andes y Fundación Omacha), donde se verificó, con herramientas moleculares, que varios lotes de tortugas matamata (Chelus fimbriata) decomisadas en la ciudad de Leticia, departamento del Amazonas, Colombia, correspondían a ejemplares capturados en la Orinoquia y cuyo destino final era aparentemente Perú, como parte de una red de tráfico de fauna. Basados en este hallazgo, 2 corporaciones liberaron 400 individuos neonatos en el en el río Bita y la Reserva Natural Privada Bojonawi en el departamento del Vichada, Orinoquia colombiana. Se evidencia el tráfico de esta especie probablemente hacia Perú, donde la comercialización de tortugas es legal. Se recomienda el uso de protocolos de identificación genética para determinar y controlar la procedencia geográfica de tortugas decomisadas a futuro, como paso previo y necesario para su liberación.
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    Density and Abundance Estimation of Amazonian River Dolphins: Understanding Population Size Variability
    (Multidisciplinary Digital Publishing Institute, 2021) Mariana Paschoalini; Fernando Trujillo; Miriam Marmontel; Federico Mosquera-Guerra; Renan Lopes Paitach; Heloíse Pavanato; Gabriel Melo‐Santos; Paul A. Van Damme; André Coelho; Mariana Escobar Wilson White
    The dolphins Inia geoffrensis—boto and Sotalia fluviatilis—tucuxi are threatened cetaceans inhabiting river ecosystems in South America; population numbers are still lacking for many areas. This paper provides density and abundance estimations of boto and tucuxi in 15 rivers sampled during the past nine years as part of a multinational research alliance. Visual boat-survey data collection protocols and analyses have been developed since 2012 (based on Distance Sampling methods) and recently reviewed (2019) to improve robustness and comparability. Differences across the sampled rivers and the analyzed river basins (Amazon and Orinoco) pointed to a density/population size gradient with lower densities and abundances observed in the Orinoco basin (0.9–1.5 ind./km²), passing through the eastern Amazon basin (2–5 ind./km²), and the largest numbers found at the central Brazilian Amazon (lower Purus River—2012 (14.5 boto/km², N = 7672; 17.1 tucuxi/km², N = 9238)). However, in other parts of the central Amazon, the density of dolphins was smaller than expected for high productive whitewater rivers (1–1.7 ind./km² in the Japurá and Solimões rivers). We attributed these differences to specific features of the basin (e.g., hydro-geomorphology) as well as to the cumulative effects of anthropogenic activities.
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    “Pig in a poke (gato por liebre)”: The “mota” (Calophysus macropterus) Fishery, Molecular Evidence of Commercialization in Colombia and Toxicological Analyses
    (Springer Science+Business Media, 2014) Cristian Salinas; Juan Camilo Cubillos-M; Rigoberto Gómez; Fernando Trujillo; Susana Caballero
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    Update on the freshwater distribution of Sotalia in Colombia, Ecuador, Peru, Venezuela and Suriname
    (2010) Catalina Gomez‐Salazar; Marcela Portocarrero‐Aya; Fernando Trujillo; Susana Caballero; Jaime Bolaños‐Jiménez; V. Utreras; Tamara L. McGuire; Arnaldo Ferrer-Pérez; Monique Pool; Enzo Aliaga‐Rossel