Browsing by Author "XX677358"
Now showing items 21-38 of 38
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Reyes Olivares, Claudio; Guajardo Santibáñez, Andrés; Segura, Bernardo; Zañartu, Nicolás; Penna Varela, Mario; Labra, Antonieta (Wiley, 2020)Vertebrate predation by invertebrates has been classically underexplored and thus underestimated, despite the fact that many arthropods consume vertebrates. To shed some light on the relevance that spider predation may ...
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Moneta, María E.; Penna Varela, Mario; Loyola, Hugo; Buchheim, Anna; Kachele, Horst (SOC BIOLGIA CHILE, 2008)The voice as a representation of the psychic world of patients in psychotherapeutic interventions has not been studied thoroughly. To explore speech prosody in relation to the emotional content of words, voices recorded during ...
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Penna Varela, Mario; Palazzi, Carmen; Paolinelli, Paola; Solís Muñoz, Rigoberto (Springer-Verlag, 1990)South American male toads Bufo chilensis emit a release call in contact with other individuals and a soft amplectic call, B. spinulosus males emit a release call while isolated in breeding areas, and B. arenarum produces ...
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Serrano Serrano, José Manuel; Penna Varela, Mario; Valenzuela Sánchez, Andrés; Méndez Torres, Marco; Azat, Claudio (Springer, 2020)Sexual signals in different animals are expected to be dimorphic when both sexes signal, but cases of monomorphism are known to occur, and we lack a clear understanding about the factors that modulate the level of sexual ...
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Penna Varela, Mario; Márquez, Rafael; Bosch, Jaime; Crespo, Eduardo G. (2006)This study compares the efficiency of transmission of the advertisement calls of two species of midwife toads, Alytes cisternasii and A. obstetricans, in both native and non-native habitats in the Iberian Peninsula. Recorded ...
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Constanzo Chávez, Javiera Isidora. (Universidad de Chile, 2012)Los animales pueden evadir la depredación utilizando una diversidad de mecanismos antidepredatorios, dentro de los que se incluyen los cambios en las respuestas conductuales. Estas respuestas pueden ser moduladas por ...
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Penna Varela, Mario; Cisternas, Javiera; Toloza, Jessica (Wiley, 2017)Animals adopt different strategies to communicate by means of sound in noisy environments such that some species increase, while others decrease their vocal activity in the presence of interference. Anuran amphibians from ...
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Penna Varela, Mario (Society for the Study of Amphibians and Reptiles, 1997)The leptodactylid frogs Batrachyla taeniata, B. antartandica and B. leptopus in southern Chile produce advertisement calls composed of short pulses, repeated in species-specific patterns. Batrachyla leptopus has a call ...
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Serrano, José M.; Penna Varela, Mario (Oxford University Press, 2018)In anurans, production of advertisement calls in sexual contexts is predominantly an attribute of males. Female calls occur in a small proportion of species, and these signals typically differ from those of males. The ...
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Penna Varela, Mario; Zúñiga, Daniel (Springer-Verlag, 2014)Animals adopt different strategies to communicate by means of sound in noisy environments. Some animals increase, while others decrease, their vocal activity in the presence of interference. Anuran amphibians from ...
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Susceptibility of evoked vocal responses to noise exposure in a frog of the temperate austral forest Penna Varela, Mario; Hamilton-West Miranda, Christopher (ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2007-07)Animals that communicate by means of acoustic signals show diverse strategies in the presence of noise interference. Penna et al. (2005, Animal Behaviour, 70, 639e651) found that the leptodactylid frog Eupsophus calcaratus ...
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Penna Varela, Mario; Lin, Wen Yu; Feng, Albert S. (1997)Responses of auditory neurons in the torus semicircularis (TS) of Pleurodema thaul, a leptodactylid from Chile, to synthetic stimuli having diverse temporal patterns and to digitized advertisement calls of P. thaul and ...
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Penna Varela, Mario; Feng, Albert S.; Narins, Peter M. (Academic Press, 1997)The advertisement call of the leptodactylid frog Batrachyla antartandica from southern Chile consists of a train of brief percussive tone pulses whose energy is centred at about 2 kHz. To gain an understanding of the ...
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Solís Muñoz, Rigoberto; Penna Varela, Mario (Academic Press Inc., 1997)Relationships between testosterone plasma levels and evoked vocal responses of males of the leptodactylid frog Batrachyla taeniata from southern Chile were studied. Evoked vocal responses were elicited in the field with ...
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Penna Varela, Mario; Narins, Peter M.; Feng, Albert S. (2005)Thresholds for evoked advertisement calling for 18 males were measured in a temperate forest in southern Chile, in order to relate this behavior to the intensities of neighbors' calls that males of this species encounter ...
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Plaza Bobadilla, María Alicia (Universidad de Chile, 2012)Los sistemas de comunicación animal requieren ser caracterizados en sus diversos componentes: los organismos emisores y las señales que producen, el medio ambiente a través del cual éstas se propagan y las capacidades ...
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Vocal responses of austral forest frogs to amplitude and degradation patterns of advertisement calls Penna Varela, Mario; Moreno Gómez, Felipe N.; Muñoz, Matías I.; Cisternas, Javiera (Elsevier, 2017)Degradation phenomena affecting animal acoustic signals may provide cues to assess the distance of emitters. Recognition of degraded signals has been extensively demonstrated in birds, and recently studies have also reported ...
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Penna Varela, Mario; Toloza, Jéssica (Wiley-Blackwell, 2015)Interfering sounds from biotic and abiotic origins are likely to shape the responsiveness of sound communicating animals. Among these sources of interference, interactions among acoustically active species have been studied ...