title: Biological clocks: riding the tides.
abstract: Animals with habitats in the intertidal zone often display biological rhythms that coordinate with both the tidal and the daily environmental cycles. Two recent studies show that the molecular components of the biological clocks mediating tidal rhythms are likely different from the phylogenetically conserved components that mediate circadian (daily) rhythms.
authors.affiliation: Department of Biology, University of Washington, Seattle, WA 98195-1800, USA. Electronic address: horaciod@uw.edu.
authors.forename: Horacio O
authors.initials: HO
authors.lastname: de la Iglesia
authors.forename: Carl Hirschie
authors.initials: CH
authors.lastname: Johnson
mesh_terms: D000818:Animals; D000845:Annelida / Q000502:physiology*; D047389:Casein Kinase I / Q000378:metabolism*; D057906:Circadian Clocks / Q000235:genetics* / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D033321:Isopoda / Q000235:genetics* / Q000502:physiology*; D008297:Male; D010507:Periodicity
chemical_list: D047389:Casein Kinase I