A PRELIMINARY REPORT ON THE ACOUSTIC COMMUNICATION IN URUGUAYAN CTENOMYS (RODENTIA, OCTODONTIDAE): BASIC SOUND TYPES

Francescoli, Gabriel

doi:10.1080/09524622.1999.9753431

Cited by 38 publications

(65 citation statements)

References 13 publications

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“…Both male and female Ctenomys pearsoni emit S-type vocalizations. Although males are slightly heavier than females, no significant differences in vocalizations have been detected between sexes, except a higher bout rate in males (Francescoli 1999).…”

Section: Discussionmentioning

confidence: 92%

“…When emitted with enough power to be heard from outside the burrows (even if closed), are used as territorial signals (Francescoli 1999). Both male and female Ctenomys pearsoni emit S-type vocalizations.…”

Section: Discussionmentioning

confidence: 99%

“…The sonagram for the figure was generated using Avisoft SASLab Pro 3.0 software. See Francescoli (1999) for more details about the method.…”

Section: Methodsmentioning

confidence: 99%

“…These low pitched signals could be heard from outside the burrow system due to the power of the emission (Francescoli 1999) and they could propagate through soil from one burrow to another up to 6 meters away (Francescoli 1998 and unpubl. ), so, they putatively serve as spacing signals.…”

Section: Introductionmentioning

confidence: 99%

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Geographic variation in vocal signals ofCtenomys pearsoni

Francescoli¹

2002

Acta Theriol

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The S-type vocalizations of three populations of Ctenomys from Uruguay were compared: two of Ctenomys pearsoni Lessa and Langguth, 1983 from Penino and Relincho and the third from a different karyomorph of the genus (Solís karyomorph). Ten rhythm and 3 frequency variables were used for discriminant analysis. The results showed that a set of nine variables allowed a complete separation of the populations. The two C. pearsoni populations were correctly discriminated from one another using four variables, the differences lying especially in the rhythm domain. Information about the general biology and distribution of the animals suggest that these differences could be explained as a product of chance variations and later fixation of the variants in local populations. The Solís karyomorph was also correctly discriminated from the other populations using four variables, but main frequency seems to play an important role in this case.Sección Etología,

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

“…The sonagram for the figure was generated using Avisoft SASLab Pro 3.0 software. See Francescoli (1999) for more details about the method.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geographic variation in vocal signals ofCtenomys pearsoni

Francescoli¹

2002

Acta Theriol

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“…Existen varios estudios sobre las vocalizaciones audibles en pequeños roedores octodontinos, especialmente en el roedor subterráneo Ctenomys [10][11][12], pero para los roedores cricétidos son muy escasos [13,14]. En el presente estudio se describe por primera vez las variables espectrales y temporales de las vocalizaciones de dos especies de ratones cricétidos simpátricos, Reithrodontomys soderstromi y Thomasomys paramorum.…”

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Vocalizaciones de los ratones Reithrodontomys soderstromi y Thomasomys paramorum (Rodentia: Cricetidae) de la provincia de Carchi, Ecuador

Brito

Batallas²

2014

Av. Cienc. Ing. (Quito)

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We report descriptive information on the vocalizations of two species of rodents, analyzing and describing their spectral and temporal variability. Reithrodontomys soderstromi emits a nearly constant sounding whistle with a mean dominant frequency of 10.16 ± 0.20 kHz. The vocalizations of Thomasomys paramorum resemble clicks with frequency modulations with a mean dominant frequency of 1.74 ± 0.10 kHz and generates a harmonic whose mean frequency is 3.64 ± 0.24 kHz.Keywords. Andes, Polylepis woodlands, vocalization. ResumenReportamos información descriptiva de las vocalizaciones de dos especies de ratones, analizando y describiendo sus variables espectrales y temporales. Reithrodontomys soderstromi presenta vocalizaciones similares a un silbido de frecuencia constante con una frecuencia dominante promedio de 10.16 ± 0.20 kHz; mientras que Thomasomys paramorum vocaliza como un chasquido de frecuencia modulada con una frecuencia dominante promedio de 1.74 ± 0.10 kHz, generando un armónico cuya frecuencia promedio es de 3.64 ± 0.24 kHz.Palabras Clave. Andes, bosque de Polylepis, vocalización.Los roedores emiten tanto sonidos audibles como inaudibles (dentro del margen de audición humana) [1,2] que forman complejos comunicativos que se dan ante estrés y riesgo de depredación, llamados de encuentro, afectivos y apareamiento y de agresión y juego [3][4][5][6][7][8][9]. Existen varios estudios sobre las vocalizaciones audibles en pequeños roedores octodontinos, especialmente en el roedor subterráneo Ctenomys [10-12], pero para los roedores cricétidos son muy escasos [13,14]. En el presente estudio se describe por primera vez las variables espectrales y temporales de las vocalizaciones de dos especies de ratones cricétidos simpátricos, Reithrodontomys soderstromi y Thomasomys paramorum.Las grabaciones se obtuvieron en un bosque de Polylepis (0• 42'55.5"N, 77• 58'56.1"O, 3635 m), zona de amortiguamiento de la Reserva Ecológica El Ángel, parroquia La Libertad, cantón Espejo, provincia del Carchi, norte de Ecuador (Fig. 1) Las vocalizaciones se registraron con una grabadora digital Panasonic RR-US310, conectada a un sistema modular Sennheiser K6-C, acoplado a un micrófono de ca-

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