Nocturnal to Diurnal Switches with Spontaneous Suppression of Wheel-Running Behavior in a Subterranean Rodent

Autor(es)

Tachinardi, Patricia ^[1] ; Toien, Oivind ^[2] ; Valentinuzzi, Veronica S. ^[3] ; Buck, C. Loren ^[4] ; Oda, Gisele A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Sao Paulo - Brazil

^[2] Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 - USA

^[3] Ctr Reg Invest Cient & Transferencia Tecnol CRILA, La Rioja - Argentina

^[4] Univ Alaska Anchorage, Dept Biol Sci, Anchorage, AK - USA

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 10, n. 10 OCT 13 2015.
• Citações Web of Science: 7

Resumo

Several rodent species that are diurnal in the field become nocturnal in the lab. It has been suggested that the use of running-wheels in the lab might contribute to this timing switch. This proposition is based on studies that indicate feed-back of vigorous wheel-running on the period and phase of circadian clocks that time daily activity rhythms. Tuco-tucos (Ctenomys aff. knighti) are subterranean rodents that are diurnal in the field but are robustly nocturnal in laboratory, with or without access to running wheels. We assessed their energy metabolism by continuously and simultaneously monitoring rates of oxygen consumption, body temperature, general motor and wheel running activity for several days in the presence and absence of wheels. Surprisingly, some individuals spontaneously suppressed running-wheel activity and switched to diurnality in the respirometry chamber, whereas the remaining animals continued to be nocturnal even after wheel removal. This is the first report of timing switches that occur with spontaneous wheel-running suppression and which are not replicated by removal of the wheel. (AU)

• Processo FAPESP: 12/23393-5 - Padrões temporais diários de dispêndio energético no roedor subterrâneo Ctenomys aff. knighti, o tuco-tuco
• Beneficiário: Patricia Tachinardi Andrade Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/15767-2 - Cronobiologia de roedores subterrâneos (Ctenomys aff. knighti), em laboratório e em campo
• Beneficiário: Gisele Akemi Oda
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/50482-1 - Estudos cronobiológicos em roedores subterrâneos (Ctenomys aff. knighti), em laboratório e em campo
• Beneficiário: Gisele Akemi Oda
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/16362-6 - Ritmicidade e energética de roedores subterrâneos (Ctenomys aff. knighti), em laboratório e em campo
• Beneficiário: Gisele Akemi Oda
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional