| Tidal, daily, and lunar-day activity cycles in the marine polychaete Nereis virens. | |
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MedLine Citation:
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PMID: 19212835 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The burrow emergence activity of the wild caught ragworm Nereis virens Sars associated with food prospecting was investigated under various photoperiodic (LD) and simulated tidal cycles (STC) using a laboratory based actograph. Just over half (57%) of the animals under LD with STC displayed significant tidal (approximately 12.4 h) and/or lunar-day (approximately 24.8 h) activity patterns. Under constant light (LL) plus a STC, 25% of all animals were tidal, while one animal responded with a circadian (24.2 h) activity rhythm suggestive of cross-modal entrainment where the environmental stimulus of one period entrains rhythmic behavior of a different period. All peaks of activity under a STC, apart from that of the individual cross-modal entrainment case, coincided with the period of tank flooding. Under only LD without a STC, 49% of the animals showed nocturnal (approximately 24 h) activity. When animals were maintained under free-running LL conditions, 15% displayed significant rhythmicity with circatidal and circadian/circalunidian periodicities. Although activity cycles in N. virens at the population level are robust, at the individual level they are particularly labile, suggesting complex biological clock-control with multiple clock output pathways. |
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Authors:
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Kim S Last; Thierry Bailhache; Cas Kramer; Charalambos P Kyriacou; Ezio Rosato; Peter J W Olive |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Chronobiology international Volume: 26 ISSN: 1525-6073 ISO Abbreviation: Chronobiol. Int. Publication Date: 2009 Feb |
Date Detail:
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Created Date: 2009-02-12 Completed Date: 2009-04-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8501362 Medline TA: Chronobiol Int Country: United States |
Other Details:
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Languages: eng Pagination: 167-83 Citation Subset: IM |
Affiliation:
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The Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, UK. kim.last@sams.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Behavior, Animal / physiology* Biological Clocks / physiology* Circadian Rhythm / physiology* Moon* Photoperiod Polychaeta / physiology* Tidal Waves* |
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