Browsing by Autor "Jorge Espinoza-Echeverría"

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First record and detailed description of calls from the Bolivian bamboo rat Dactylomys boliviensis in Carrasco National Park, Bolivia
(2025) Mauricio Ocampo; Rene Carpio Real; Jorge Espinoza-Echeverría; Lizette Siles
Introduction: Sound communication among conspecific mammals is quite common and facilitates various behavioral interactions. The Bolivian bamboo rat, Dactylomys boliviensis, like many other mammals, uses this system to mark its territory and attract females. Methods: We occasionally recorded the complete song of this species within Carrasco National Park, very close to the type locality, representing the first record of the species for the park. We compared our record with other calls from further northwest, near the border with Peru, and found significant differences in timing and structure. Results: The call consists of a strong staccato, is divided in 2 parts, and the dominant frequency is 1.16 kHz. Our results reveal considerable variation in the song between individuals. Discussion: The variation found may be influenced by factors such as individual size, soundscape limitations, changes in song structure due to distance, or even species differentiation. This record presents an opportunity for the scientific community to further investigate the causes of this call variation.
Higher than the others: Bothrops bilineatus (Wied-Neuwied, 1821) (Serpentes: Viperidae) a new altitudinal record and range extension in Bolivia
(Fundación Miguel Lillo, 2024) Oliver Quinteros-Muñoz; Bladimir Marca; Rene Carpio Real; Pedro Gómez-Murillo; Edwin Coaquira; Jorge Espinoza-Echeverría
We report a new altitudinal record for Bothrops bilineatus (Wied-Neuwied, 1821) in the department of Cochabamba, Bolivia, based on verifiable records from the Yungas ecoregion of the department. This work not only corroborates the highest record for Bolivia, but also extends the record of the species by more than 50 km to the southeast, from the closest record in Villa Tunari, Cochabamba, Bolivia. The first record of the species for the Yungas ecoregion in Bolivia is formally confirmed. The highest record for the species in South America is also confirmed.
Señales de vida: Redescubrimiento de Erythrolamprus andinus (Dixon, 1983) (Serpentes: Dipsadidae) en Bolivia
(Spanish National Research Council, 2022) Oliver Quinteros-Muñoz; Pedro Gómez-Murillo; Alejandro Ochoa; Jorge Espinoza-Echeverría
Cien años después de la colecta de J. Steinbach de Erythrolamprus andinus (Dixon, 1983), reportamos el redescubrimiento de E. andinus en la localidad tipo de Incachaca, Cochabamba, Bolivia. Por primera vez, se proporcionan comentarios sobre la coloración en vida, como también las primeras imágenes a color para la especie. Considerando la rareza de esta serpiente debido a los pocos registros desde su descripción, recomendamos un estado de conservación global de En Peligro Crítico para E. andinus.