The fractal organization of ultradian rhythms in avian behavior
Abstract Living systems exhibit non-randomly organized biochemical, physiological, and behavioral processes that follow distinctive patterns. In particular, animal behavior displays both fractal dynamics and periodic rhythms yet the relationship between these two dynamic regimens remain unexplored....
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-00743-2 |
| _version_ | 1818425247010914304 |
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| author | Diego A. Guzmán Ana G. Flesia Miguel A. Aon Stefania Pellegrini Raúl H. Marin Jackelyn M. Kembro |
| author_facet | Diego A. Guzmán Ana G. Flesia Miguel A. Aon Stefania Pellegrini Raúl H. Marin Jackelyn M. Kembro |
| author_sort | Diego A. Guzmán |
| collection | DOAJ |
| description | Abstract Living systems exhibit non-randomly organized biochemical, physiological, and behavioral processes that follow distinctive patterns. In particular, animal behavior displays both fractal dynamics and periodic rhythms yet the relationship between these two dynamic regimens remain unexplored. Herein we studied locomotor time series of visually isolated Japanese quails sampled every 0.5 s during 6.5 days (>106 data points). These high-resolution, week-long, time series enabled simultaneous evaluation of ultradian rhythms as well as fractal organization according to six different analytical methods that included Power Spectrum, Enright, Empirical Mode Decomposition, Wavelet, and Detrended Fluctuation analyses. Time series analyses showed that all birds exhibit circadian rhythms. Although interindividual differences were detected, animals presented ultradian behavioral rhythms of 12, 8, 6, 4.8, 4 h and/or lower and, irrespective of visual isolation, synchronization between these ultradian rhythms was observed. Moreover, all birds presented similar overall fractal dynamics (for scales ∼30 s to >4.4 h). This is the first demonstration that avian behavior presents fractal organization that predominates at shorter time scales and coexists with synchronized ultradian rhythms. This chronobiological pattern is advantageous for keeping the organism’s endogenous rhythms in phase with internal and environmental periodicities, notably the feeding, light-dark and sleep-wake cycles. |
| first_indexed | 2024-12-14T14:10:54Z |
| format | Article |
| id | doaj.art-1d8e1d7fc6864dd8921b33908c745a2f |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-14T14:10:54Z |
| publishDate | 2017-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-1d8e1d7fc6864dd8921b33908c745a2f2022-12-21T22:58:18ZengNature PortfolioScientific Reports2045-23222017-04-017111310.1038/s41598-017-00743-2The fractal organization of ultradian rhythms in avian behaviorDiego A. Guzmán0Ana G. Flesia1Miguel A. Aon2Stefania Pellegrini3Raúl H. Marin4Jackelyn M. Kembro5Instituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET); Instituto de Ciencia y Tecnología de los Alimentos, Cátedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de CórdobaCentro de Investigaciones y Estudios de Matemática (CIEM - CONICET); Facultad de Matemática, Astronomía y Física FAMAF, Universidad Nacional de Córdoba, Ing. Medina Allende s/n Ciudad UniversitariaJohns Hopkins University School of MedicineInstituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET); Instituto de Ciencia y Tecnología de los Alimentos, Cátedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de CórdobaInstituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET); Instituto de Ciencia y Tecnología de los Alimentos, Cátedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de CórdobaInstituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET); Instituto de Ciencia y Tecnología de los Alimentos, Cátedra de Química Biológica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de CórdobaAbstract Living systems exhibit non-randomly organized biochemical, physiological, and behavioral processes that follow distinctive patterns. In particular, animal behavior displays both fractal dynamics and periodic rhythms yet the relationship between these two dynamic regimens remain unexplored. Herein we studied locomotor time series of visually isolated Japanese quails sampled every 0.5 s during 6.5 days (>106 data points). These high-resolution, week-long, time series enabled simultaneous evaluation of ultradian rhythms as well as fractal organization according to six different analytical methods that included Power Spectrum, Enright, Empirical Mode Decomposition, Wavelet, and Detrended Fluctuation analyses. Time series analyses showed that all birds exhibit circadian rhythms. Although interindividual differences were detected, animals presented ultradian behavioral rhythms of 12, 8, 6, 4.8, 4 h and/or lower and, irrespective of visual isolation, synchronization between these ultradian rhythms was observed. Moreover, all birds presented similar overall fractal dynamics (for scales ∼30 s to >4.4 h). This is the first demonstration that avian behavior presents fractal organization that predominates at shorter time scales and coexists with synchronized ultradian rhythms. This chronobiological pattern is advantageous for keeping the organism’s endogenous rhythms in phase with internal and environmental periodicities, notably the feeding, light-dark and sleep-wake cycles.https://doi.org/10.1038/s41598-017-00743-2 |
| spellingShingle | Diego A. Guzmán Ana G. Flesia Miguel A. Aon Stefania Pellegrini Raúl H. Marin Jackelyn M. Kembro The fractal organization of ultradian rhythms in avian behavior Scientific Reports |
| title | The fractal organization of ultradian rhythms in avian behavior |
| title_full | The fractal organization of ultradian rhythms in avian behavior |
| title_fullStr | The fractal organization of ultradian rhythms in avian behavior |
| title_full_unstemmed | The fractal organization of ultradian rhythms in avian behavior |
| title_short | The fractal organization of ultradian rhythms in avian behavior |
| title_sort | fractal organization of ultradian rhythms in avian behavior |
| url | https://doi.org/10.1038/s41598-017-00743-2 |
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