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Chronobiology of South American subterranean rodents, in laboratory and field

Grant number: 14/20671-0
Support type:Regular Research Grants
Duration: July 01, 2015 - June 30, 2017
Field of knowledge:Biological Sciences - Physiology
Principal Investigator:Gisele Akemi Oda
Grantee:Gisele Akemi Oda
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Verônica Sandra Valentinuzzi


The aim of this project is to continue our parallel approach of field and laboratory Chronobiology of tuco-tucos (Ctenomys aff. knighti), which are South American subterranean rodents. Daily rhythms of locomotor activity, body temperature and oxygen consumption have already been characterized and these are synchronized by light/dark cycles, both in the laboratory and field. In the field, previous preliminary works, based on continuous observation of tuco-tucos kept in semi-natural enclosures revealed that they are exposed to light daily, at random times of the day. The goal of this project is the automated measurement of the temporal pattern of daily light exposure in tuco-tucos, in order to obtain greater sample size and long-term recordings, to enable seasonal monitoring of daily light exposure temporal pattern. A new device for recording and storage of this data will be used on animals kept in newly constructed semi-natural enclosures. This is the third model tested by the group over last seven years, being the most accurate, anatomical and robust. Parameters of temporal patterns will be incorporated into computer simulations to improve the model of natural daily synchronization developed by the group, as well as the annual photoperiodic synchronization. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
JANNETTI, MILENE G.; BUCK, C. LOREN; VALENTINUZZI, VERONICA S.; ODA, GISELE A. Day and night in the subterranean: measuring daily activity patterns of subterranean rodents (Ctenomys aff. knighti) using bio-logging. CONSERVATION PHYSIOLOGY, v. 7, JUL 19 2019. Web of Science Citations: 1.
TACHINARDI, PATRICIA; VALENTINUZZI, VERONICA S.; ODA, GISELE A.; BUCK, C. LOREN. The Interplay of Energy Balance and Daily Timing of Activity in a Subterranean Rodent: A Laboratory and Field Approach. PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY, v. 90, n. 5, p. 546-552, SEP-OCT 2017. Web of Science Citations: 2.
FLORES, DANILO E. F. L.; JANNETTI, MILENE G.; VALENTINUZZI, VERONICA S.; ODA, GISELE A. Entrainment of circadian rhythms to irregular light/dark cycles: a subterranean perspective. SCIENTIFIC REPORTS, v. 6, OCT 4 2016. Web of Science Citations: 4.

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