{"refrec":{"BRefID":127246,"RR":"<b>Hørlyck, V.</b> (1973). Seasonal and diel variation in the rhythmicity of <i>Idotea baltica</i> (Pallas) and <i>Idotea granulosa</i> Rathke. <i>Ophelia 12(1-2)</i>: 117-127","BEntID":121317,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Ophelia 12(1-2)</i>: 117-127","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hørlyck, V.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hørlyck, V.","Englishabstract":"The swimming activity of Idotea baltica and <i>I. granulosa</i> was investigated by means of photocells. The activity patterns of both species showed great seasonal variations. Both species showed no swimming activity in winter (<i>I. baltica</i> from Nov-March, and <i>I. granulosa</i> from Sept-March). The rest of the yr both species had one activity peak between midnight and sunrise. <i>I. baltica</i> was nocturnal in early spring, in summer the activity was high all 24 hrs, besides the nocturnal maximum an increased activity was evident in the afternoon till 2 hrs after SS. At the end of Sept and the beginning of Oct <i>I. baltica</i> was nocturnal. The same variation in the activity pattern was found for <i>I. granulosa</i>. Under artificial light/dark conditions both species were nocturnal. When the light/dark change was right-angled this was the dominating Zeitgeber.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Seasonal and diel variation in the rhythmicity of <i>Idotea baltica</i> (Pallas) and <i>Idotea granulosa</i> Rathke","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1973,"MonPub":null,"DateUpdate":"2014-08-21","DateCreate":"2008-10-28","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":127246,"PubliDate":1973,"Pagination":"117-127","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":"1-2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43470,"SerRR":"Ophelia: International Journal of Marine Biology. 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