Semi-Lunar Variations of Endogenous Circa-Tidal Rhythms of Activity and Respiration In the lsopod Eurydice pulchra
Year: 1981
Type: article
Abstract: When collected from the shore and placed into infra-red beam actographs in constant darkness at 15 'C in the laboratory, individual adult Eurydice pulchra Leach exhibit an endogenous circa-tidal rhythm of spontaneous swimming activity.Periodogram analysis of activity traces indicates a semi-lunar modulation in the rhythm's expression.It is most strongly expressed in isopods collected during spring tide periods.Groups of E. pulchra in moist sterilized sand were maintained in Gilson respirometers under constant darkness at 15 "C; subsequent recordings of their respiratory rate demonstrated an endogenous circa-tidal rhythm of oxygen uptake, with peak rates at the time of expected high water This rhythm was expressed during spring tide, but not neap tide periods.Relationships of circa-tidal rhythms, their semi-lunar modulations and the semilunar emergence pattern of E. pulchra are discussed.
Source: Marine Ecology Progress Series
DOI: 10.3354/meps004085
Author: MH Hastings
Institution: University of Liverpool
Language: English
Subfield: Endocrine and Autonomic Systems
Field: Neuroscience
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W2086828498