Document Detail

Tidal, daily, and lunar-day activity cycles in the marine polychaete Nereis virens.
MedLine Citation:
PMID:  19212835     Owner:  NLM     Status:  MEDLINE    
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.
Kim S Last; Thierry Bailhache; Cas Kramer; Charalambos P Kyriacou; Ezio Rosato; Peter J W Olive
Related Documents :
17673795 - Factors associated with practice decisions of nebraska veterinarians regarding type of ...
22149075 - Cold plasma decontamination of foods.
16903785 - A distributed chemosensory circuit for oxygen preference in c. elegans.
9327465 - Review--animal waste used as livestock feed: dangers to human health.
24298235 - Neuroendocrine regulation of appetitive ingestive behavior.
25475685 - A difference-in-differences approach to estimate the effect of income-supplementation o...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chronobiology international     Volume:  26     ISSN:  1525-6073     ISO Abbreviation:  Chronobiol. Int.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-02-12     Completed Date:  2009-04-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8501362     Medline TA:  Chronobiol Int     Country:  United States    
Other Details:
Languages:  eng     Pagination:  167-83     Citation Subset:  IM    
The Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Behavior, Animal / physiology*
Biological Clocks / physiology*
Circadian Rhythm / physiology*
Polychaeta / physiology*
Tidal Waves*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The nocturnal activity of fruit flies exposed to artificial moonlight is partly caused by direct lig...
Next Document:  Effects of continuous light on the reproductive system of European sea bass gauged by alterations of...