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Strange attractor of a narwhal (Monodon monoceros)
| Title: | Strange attractor of a narwhal (Monodon monoceros) |
| Authors: | Podolskiy, Evgeny A. Browse this author | | Heide-Jorgensen, Mads Peter Browse this author |
| Issue Date: | 22-Sep-2022 |
| Publisher: | PLOS |
| Journal Title: | PLoS computational biology |
| Volume: | 18 |
| Issue: | 9 |
| Start Page: | e1010432 |
| Publisher DOI: | 10.1371/journal.pcbi.1010432 |
| Abstract: | Detecting structures within the continuous diving behavior of marine animals is challenging, and no universal framework is available. We captured such diverse structures using chaos theory. By applying time-delay embedding to exceptionally long dive records (83 d) from the narwhal, we reconstructed the state-space portrait. Using measures of chaos, we detected a diurnal pattern and its seasonal modulation, classified data, and found how sea-ice appearance shifts time budgets. There is more near-surface rest but deeper dives at solar noon, and more intense diving during twilight and at night but to shallower depths (likely following squid); sea-ice appearance reduces rest. The introduced geometrical approach is simple to implement and potentially helpful for mapping and labeling long-term behavioral data, identifying differences between individual animals and species, and detecting perturbations. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/87837 |
| Appears in Collections: | 北極域研究センター (Arctic Research Center) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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