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Pronounced temporal fluctuations in faecal deposition are described that relate, in terms of amplitude and period, to both sinusoidal rhythmicity established for ammonia excretion and changes in the morphology of digestive tubules. Although at least partially synchronised among replicate groups of mussels, these cycles bore no consistent relationship with exogenous influences, hourly fluctuation in the net absorption efficiency for nitrogen, as evidenced by the mean percentage plus or minus 2 SE. measured over 24 h sampling periods, was considerable (16.0 plus or minus 53.7, 49.3 plus or minus 10.9 and 52.8 plus or minus 6.6 for mussels acclimated in March, June and October, respectively.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Co-ordinated rhythms of digestion, absorption and excretion in <i>Mytilus edulis</i> (Bivalvia: Mollusca)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-05 01:30:47.953786","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1983,"MonPub":null,"DateUpdate":"2005-09-16","DateCreate":"2005-09-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":76513,"PubliDate":1983,"Pagination":"41-48","XtraPublOfAnaID":null,"ISBN":null,"Volume":"74","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43352,"SerRR":"Marine Biology: International Journal on Life in Oceans and Coastal Waters. 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