Acoustic analysis of alarm calls of the European ground squirrel (Spermophilus citellus) and the Taurus ground squirrel (S. taurensis) (Mammalia: Sciuridae)

Schneiderová, Irena; Policht, Richard

doi:10.1016/j.jcz.2011.07.005

Cited by 13 publications

(17 citation statements)

References 30 publications

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“…They were found only in three individual S. suslicus of 435. Alarm calls of S. citellus contain two parts, probably produced from two different sound sources (Nikoĺskii 1979(Nikoĺskii , 1984Schneiderová and Policht 2010). A similar kind of alarm calls was found in some Eurasian species of ground squirrels (Asia Minor ground squirrel S. xanthoprymnus, Caucasian mountain ground squirrel S. musicus, little ground squirrel S. pygmaeus, Alashan ground squirrel S. alashanicus, S. citellus, Taurus ground squirrels S. taurensis).…”

Section: Nonlinear Phenomenamentioning

confidence: 77%

“…All individual S. suslicus and S. fulvus were microchip-(Bayer, Leverhusen, Germany) and dye marked (p-phenylenediamine; Rhodia, Paris, France) (as in Matrosova et al 2007Matrosova et al , 2009Matrosova et al , 2010b. Individual S. citellus were also marked (900 Black, Palette, Schwarzkopf & Henkel, Düsseldorf, Germany), as in the study of Schneiderová and Policht (2010) and in Loděnice colony (see below), with microchips (Planet ID, Essen, Germany).…”

Section: Subjects Study Sites and Dates Of Workmentioning

confidence: 99%

“…In the Airfield Letňany location, alarm calls of S. citellus were recorded when animals were free-ranging, and, after a recording session, each focal animal was captured with a loop, marked with black hair dye to avoid repeated recordings of the same individual, and released back. Because this mark is not permanent, we also used widely spaced sites of data collection to avoid repeated recordings from the same animals (Schneiderová and Policht 2010). In all the three species, some sound recordings were also made during the handling procedures and in one individual S. citellus, from the burrow during an aggressive encounter with a conspecific.…”

Section: Data Collectionmentioning

confidence: 99%

“…For all the three species, only alarm calls have been described and analyzed in detail (S. suslicus: Nikoĺskii 1979Nikoĺskii , 1984Volodin 2005;Matrosova et al 2007Matrosova et al , 2009Matrosova et al , 2011Volodina et al 2010;S. citellus: Nikoĺskii 1979;Georgiev et al 2004;Koshev and Pandourski 2008;Schneiderová and Policht 2010;S. fulvus: Nikoĺskii 1979S.…”

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confidence: 99%

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Species-specific and shared features in vocal repertoires of three Eurasian ground squirrels (genus Spermophilus)

et al. 2011

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Along to alarm calls, Eurasian ground squirrels of the genus Spermophilus also produce other call types toward potential predators and rival conspecifics. Individually identified 50 speckled (Spermophilus suslicus), 18 European (S. citellus) and 59 yellow (S. fulvus) ground squirrels were examined for interspecies differences in their vocal repertoires. A separate sample of 116 (90 adult and 26 juvenile) S. suslicus was examined for presence of ultrasound in their alarm calls. In addition, all tonal calls in all the three species were checked for presence of nonlinear phenomena. Calls were elicited by approaching animals in live-traps or near burrows; some types of vocalizations were also recorded during handling. Eight call types, three tonal and five wideband ones, were described. Vocal repertoires were remarkably similar between species, excluding the alarm calls, which were species-specific. Alarm calls with ultrasonic components were found in two individuals of S. suslicus. Concerning nonlinear phenomena, biphonation in alarm calls of S. suslicus, frequency jumps and sidebands in screams of S. citellus, frequency jumps and subharmonics in screams of S. fulvus were found. Results are discussed with literature evidence on audible and ultrasonic vocalizations in ground squirrels.

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Section: Nonlinear Phenomenamentioning

confidence: 77%

Section: Subjects Study Sites and Dates Of Workmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

mentioning

confidence: 99%

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Species-specific and shared features in vocal repertoires of three Eurasian ground squirrels (genus Spermophilus)

et al. 2011

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“…Compared to S. xanthoprymnus (see Gür and Gür 2010), diagnostic characters for S. citellus are as follows: the skull is less angular, back indistinctly spotted, and tail longer (S. xanthoprymnus, range: 30-72 mm; S. citellus, range: 31-90 mm) with black hairs dorsally Vohralík 2005, 2012). S. citellus, S. taurensis, and S. xanthoprymnus can be clearly distinguished on the basis of their alarm calls (Schneiderova´and Policht 2011a, 2011b.…”

Section: Diagnosismentioning

confidence: 99%

Spermophilus citellus(Rodentia: Sciuridae)

et al. 2014

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Differences in alarm calls of juvenile and adult European ground squirrels (Spermophilus citellus): Findings on permanently marked animals from a semi‐natural enclosure

et al. 2015

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The European ground squirrel (Spermophilus citellus) emits alarm calls that warn conspecifics of potential danger. Although it has been observed that inexperienced juveniles of this species emit alarm calls that sound similar to those of adults, studies focusing on juvenile alarm calls are lacking. We analyzed the acoustic structure of alarm calls emitted by six permanently marked European ground squirrels living in a semi-natural enclosure when they were juveniles and after 1 year as adults. We found that the acoustic structure of the juvenile alarm calls was significantly different from those of adults and that the alarm calls underwent nearly the same changes in all studied individuals. All juveniles emitted alarm calls consisting of one element with almost constant frequency, but their alarm calls included a second frequency-modulated element after their first hibernation as adults. Our data show that the duration of the first element is significantly shorter in adults than in juveniles. Additionally, the frequency of the first element is significantly higher in adults than in juveniles. Similar to previous findings in other Palearctic ground squirrel species, our data are inconsistent with the assumption that juvenile mammals emit vocalizations with higher fundamental frequencies than adults. However, our results do not support the previously suggested hypothesis that juvenile ground squirrels conceal information regarding their age in their alarm calls because we found significant differences in alarm calls of juveniles and adults.

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Acoustic analysis of alarm calls of the European ground squirrel (Spermophilus citellus) and the Taurus ground squirrel (S. taurensis) (Mammalia: Sciuridae)

Cited by 13 publications

References 30 publications

Species-specific and shared features in vocal repertoires of three Eurasian ground squirrels (genus Spermophilus)

Species-specific and shared features in vocal repertoires of three Eurasian ground squirrels (genus Spermophilus)

Spermophilus citellus(Rodentia: Sciuridae)

Differences in alarm calls of juvenile and adult European ground squirrels (Spermophilus citellus): Findings on permanently marked animals from a semi‐natural enclosure

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