Ontogeny of long-range vocalizations in a Neotropical fossorial rodent: the Anillaco Tuco-Tuco (Ctenomys sp.)

PeerJ
Juan Pablo Amaya, Juan Ignacio Areta

Abstract

Tuco-tucos (Ctenomys spp.) are subterranean rodents that produce territorial, high intensity long-range vocalizations (LRVs) of broadband and low frequency that are essential for long-distance communication between individuals in different tunnel systems. Despite their importance, the development of LRVs remains poorly understood. In adult Anillaco Tuco-Tucos (Ctenomys sp.) the LRV is composed by two types of syllables (series and individual notes) that are repeated a variable number of times. We studied the development of the LRVs in eight juveniles of the Anillaco Tuco-Tuco ranging from 14-28 to 104-118 days after birth. We (1) tested whether the syllables followed any of three alternative developmental modes (retention of juvenile vocalizations, modification of juvenile precursors or de novo appearance in adults), (2) evaluated the development of structural and acoustic features of syllables, and (3) tested the prediction that juveniles should produce a greater proportion of atypical series in precursors of the LRV than adults, due to lack maturation and/or precise coupling of neuromuscular and anatomical structures. The LRV of the Anillaco Tuco-Tuco exhibited a mixed developmental mode: while series developed from juvenile ...Continue Reading

References

Sep 1, 1997·Journal of Comparative Psychology·E F Brittan-PowellS M Farabaugh
Jan 17, 2003·Physiological and Biochemical Zoology : PBZ·Roxana R ZenutoCristina Busch
Mar 17, 2011·PloS One·Jasmine M S GrimsleyJeffrey J Wenstrup
Dec 4, 2014·PloS One·Polly CampbellSteven M Phelps

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