Social modulation of the daily activity rhythm in a solitary subterranean rodent, the tuco-tuco (Ctenomys sp): SI: Chronobiology in Latin America

Barbara Mizumo Tomotani, Juan Pablo Amaya, Gisele Akemi Oda, Veronica Sandra Valentinuzzi

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Abstract South American subterranean rodents are mainly described as solitary and mutual synchronization was never observed among individuals maintained together in laboratory. We report that a single birth event was capable of disrupting the robust nocturnal activity rhythm of singly housed tuco-tucos from north-west Argentina. “Around-the-clock activity” was displayed by 8 out of 13 animals whose cages were closer to the newborn pups. However, experimental exposure to a pup vocalization did not produce a similar effect on the rhythms of adult animals. Our results indicate an effect of social interaction in the expression of biological rhythms even in solitary animals.
Original languageEnglish
Pages (from-to)280-284
Number of pages5
JournalSleep Science
Issue number4
Publication statusPublished - Oct 2016



  • Ctenomyidae
  • Tuco-tuco
  • Social synchronization
  • Around-the-clock activity
  • Circadian rhythm
  • international

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