IIBYT   23944
INSTITUTO DE INVESTIGACIONES BIOLOGICAS Y TECNOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Coherent and synchronized ultradian rhythms in the locomotor activity of visually isolated adult female Japanese quail
Autor/es:
GUZMÁN, D. A.; FLESIA, A.G.; AON, M.A.; PELLEGRINI, S. ; MARIN, R.H.; KEMBRO, J.M.
Lugar:
Louisville, Kentucky
Reunión:
Congreso; Poultry Science Association Annual Meeting; 2015
Institución organizadora:
Poultry science association
Resumen:
observing) alternating with rest phases (resting, preening), presenting ultradian (< 24h)rhythms. The temporal organization activity of groups of poultry chicks not only has been shown to present both circadian (24h) and ultradian rhythms with periods ≤ 80 min, but also synchronization of activity among chicks within the group. However, individual adult Japanese quail seem to exhibit greater inter-individual variability in ultradian compared to circadian behavioral rhythms, which could be in part due to methodological limitations, given that ultradian rhythms can be difficult to detect in behavioral time series at an individual level. This study focuses on whether synchronized ultradian rhythms can occur along several days when adult individuals are visually isolated. Herein, we study high resolution locomotor time series of 24 Japanese quails sampled every 0.5s in a home-cage environment during 6.5 days. Applying an array of methods, including autograms, power spectra, autocorrelation, Enright?s periodogram, and wavelet analyses, we show that circadian as well as ultradian rhythms with periods of a fraction of the circadian cycle (12, 8, 6, 4.8, 4, 3, 2.4, 2 h and lower) were found in all locomotor time series analyzed. In addition, these ultradian rhythms were fully organized in a coherent and synchronous way in all birds studied even though they were visually isolated from conspecifics. To our knowledge this is the first time that long ultradian rhythms (≥ 2h) are shown to be also present in poultry behavior, and that physical and visual contact between birds is not necessary for rhythm synchronization. Hence, our results support the contention that ultradian rhythms could be generated by an endogenous oscillator. Improving our knowledge on ultradian rhythms and for example whether a particular behavior is more probable to occur at a given time interval than another can have applied relevance for improving management practices.