Browsing by Author "XX677358"
Now showing items 1-20 of 38
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Velásquez, Nelson A.; Marambio, Jesús; Brunetti, Enzo; Méndez, Marco; Vásquez Salfate, Rodrigo; Penna Varela, Mario (The Linnean Society of London, 2013)The study of intraspecific variation of acoustic signals and its relationship with genetic divergence is important for understanding the origin of divergence in communication systems. We studied geographical variation in ...
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Muñoz, Matías; Quispe, Maricel; Maliqueo, Manuel; Penna Varela, Mario (Elsevier, 2020)In animals, the expression of diverse reproductive behaviors is hormonally regulated. In particular, vocalizing during courtship has been related to circulating androgen levels, and reciprocally, conspecific vocalizations ...
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Brugere, Solange; Saavedra, Alvaro; Penna Varela, Mario (1986)In urethane anesthetized rats, intravenous administration of a bolus of acetaldehyde (diluted 50 times its volume in Ringer Locke solution) induced after a latency of about 1 second, a triple reflex response characterized ...
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Penna Varela, Mario; Brugere, Solange; Canas, Muriel; Saavedra, Alvaro (1985)Intravenous administration of a bolus of ethanol (40 mg/100 g b.w.) to rats induced bradycardia, hypotension and apnea. Bradycardia was dose dependent (r=-0.78, p<0.001). Acute bilateral vagotomy blocked bradycardia and ...
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Constanzo Chávez, Javiera; Penna Varela, Mario; Labra, Antonieta (Elsevier, 2018)The microhabitat preferences of prey animals can modulate how they perceive predation risk, and therefore, their antipredator behaviour. We tested under standardized conditions how microhabitat preferences of two Liolaemus ...
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Penna Varela, Mario; Moreno Gómez, Felipe (Public Library Science, 2015)The acoustic adaptation hypothesis predicts that sound communication signals have an optimal relationship with animals' native environments. However, species sharing a habitat produce signals stratified in the spectral ...
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Zavala Melo, José Francisco (Universidad de Chile, 2009)En los anfibios anuros, la comunicación acústica es ampliamente utilizada como medio de interacción social entre conespecíficos. En la época de apareamiento algunas especies conforman agregaciones o coros, donde los machos ...
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Cuéllar Ferrada, Andrea (Universidad de Chile, 2009)Los anuros utilizan señales acústicas extensamente; la localización de la fuente sonora permite a las hembras acercarse a los machos y también facilitaría a los machos responder a rivales. Sin embargo, en experimentos de ...
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Bravo Roznowski, José (Universidad de Chile, 2008)Los anfibios anuros utilizan extensamente las señales acústicas, siendo capaces de detectarlas, reconocerlas y localizarlas. La capacidad de localizar la fuente sonora permite a las hembras acercarse a los machos y aparearse. ...
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Penna Varela, Mario; Velásquez, Nelson A.; Bosch, Jaime (Wiley-Blackwell, 2015)The auditory sensitivity in three species of the anuran genus Alytes (Alytidae) was examined to determine patterns of intra- and interspecific variation, relating these measurements to behavioural preferences measured in ...
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Velásquez, Nelson A.; Opazo, Daniel; Díaz, Javier; Penna Varela, Mario (PLOS One, 2014)Divergence of acoustic signals in a geographic scale results from diverse evolutionary forces acting in parallel and affecting directly inter-male vocal interactions among disjunct populations. Pleurodema thaul is a frog ...
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Penna Varela, Mario; Solís Muñoz, Rigoberto; Corradini, Paulina; Moreno Gómez, Felipe (Taylor and Francis, 2020)Evoked vocal responses of male frogs Batrachyla taeniata to synthetic advertisement calls and variants having different temporal features altered parametrically were studied to identify patterns of evoked vocal responses ...
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Vásquez Aranda, Cristian Rodrigo (Universidad de Chile, 2010)Existen dos tipos de células receptoras en la cóclea de los mamíferos, las células ciliadas internas, inervadas por fibras del nervio auditivo aferente y las células ciliadas externas, que reciben principalmente inervación ...
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Zúñiga Sepúlveda, Daniel Sebastián (Universidad de Chile, 2010)Diversos animales adoptan distintas estrategias para mantener la comunicación acústica en ambientes ruidosos. Algunos animales incrementan su actividad, en tanto que otros la disminuyen en presencia de esta interferencia. ...
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Hamilton-West Miranda, Christopher (Universidad de Chile, 2005)Los animales que se comunican a través de señales acústicas han desarrollado diversas estrategias para confrontar las interferencias provocadas por el ruido. Sin embargo, los mecanismos usados por los animales en estas ...
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Soffia, Francisca; Penna Varela, Mario (1987)Supernatant of rat heart homogenates obtained by centrifugation at 700 × g for 10 min, incubated in the presence of ethanol (25 and 50 mM) and glucose (10 mM) were found to oxidize ethanol to acetaldehyde (AcH) in such a ...
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Moreno-Gómez, Felipe N.; Bartheld, José; Silva-Escobar, Andrés A.; Briones, Raúl; Márquez, Rafael; Penna Varela, Mario (Elsevier B.V., 2019)Passive acoustic monitoring is becoming an extensively used tool to evaluate the status and variation of populations of sound producing animals. The analyses of extensive acoustic recordings for identification and detection ...
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Penna Varela, Mario; Solís Muñoz, Rigoberto (1998)Sound pressure levels and the spectral structure of the advertisement calls of five species of frogs from the South American temperate austral forest were analyzed. Males of Eupsophus emiliopugini, Batrachyla antartandica ...
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Penna Varela, Mario; Solís Muñoz, Rigoberto (Academic Press, 1996)The effect of burrow acoustics on the reception of sounds by a leptodactylid frog, Eupsophus emiliopugini, from Southern Chile was investigated. Burrows occupied by E. emiliopugini males amplified vocalizations produced ...
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Velásquez, Nelson A.; Valdés, José Luis; Vásquez Salfate, Rodrigo; Penna Varela, Mario (Elsevier, 2015)Sexual selection is one of the main evolutionary forces that drive signal evolution. In previous studies, we have found out that males of Pleurodema thaul, a frog with an extensive latitudinal distribution in Chile, emits ...