{"refrec":{"BRefID":13057,"RR":"<b>Höcker, A.W.M.</b> (1974). De levenscyclus van <i>Cotylurus erraticus</i> (Rudolphi, 1809) (Trematoda, Strigeidae) in het noordelijk deel van het IJsselmeer en enige opmerkingen over twee verwante trematoden-soorten. <i>NIOZ-rapport</i>, 1974(9). Nederlands Instituut voor Onderzoek der Zee: Texel. 57 pp.","BEntID":13057,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>NIOZ-rapport</i>, 1974(9). Nederlands Instituut voor Onderzoek der Zee: Texel.  57 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Höcker, A.W.M.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Höcker, A.W.M.","Englishabstract":"Reported is about the life-cycle of<i>Cotylurus erraticus</i> in Europe. In the northern part of the IJsselmeer <i>Valvala piscinalis</i> was infected for 1,5-3% in the summer of 1973 by the species <i>Cotylurus erraticus</i>, <i>Cotylus variegatus</i> and <i>C. platycephalus</i>. For the first time, natural infections of the host are described for this species. <i>Osmerus eperlanus</i> is the most important second host for <i>Cotylurus erraticus</i> in this lake, infection is 100%. <i>Larus ridibundus</i> is an important third host. The life-cycle of <i>Cotylurus erraticus</i> was studied experimentally from metacercarium to cercarium. Development of the miracidia takes 13 days at 23°C, after which the eggs hatch without cold-shock. <i>Valvata piscinalis</i> cultured in the lab were succesfully infected by miradia of<i>Cotylurus erraticus</i>, and at 23°C the first cercaria are set free after 3 weeks. Also infections of <i>Larus argentatus</i> were succesful. The cercarium of <i>Cotylurus erraticus</i> is described in detail, as it differs partly from the description by OLSON (1970) from infections of <i>Valvata lewisi</i>. Description resembles closely those of other known cercaria from the sub-genus <i>Ichthyocotylurus</i> given by Odening (1969).","AbstractOtherLang":"Dit rapport is de eerste levensbeschrijving van de levenscyclus van <i>Cotylurus erraticus</i> in Europa. In het noordelijk deel van het IJsselmeer bleek in de zomer van 1973 1,5-3% van <i>Valvata piscinalis</i> besmet te zijn met drie <i>Cotylurus</i>-soorten: <i>Cotylurus erraticus</i>, <i>Cotylurus variegatus</i> en <i>Cotylurus platycephalus</i>. Dit is de eerste beschrijving van natuurlijke infecties van de eerste tussengastheer van deze parasieten. <i>Osmerus eperlanus</i> is in het IJsselmeer de belangrijkste tweede tussengastheer van <i>Cotylurus erraticus</i>; deze is voor 100% besmet. <i>Larus ridibundus</i> is daar een belangrijke eindgastheer. Experimenteel werd de cyclus van <i>Cotylurus erraticus</i> gevolgd door metacercarie tot cercarie. De ontwikkeling van de miracidia duurt 13 dagen bij 23°C, waarna de eieren zonder koudeshock uitkomen. <i>Valvata piscinalis</i> werd in het laboratorium gekweekt en de jonge slakken werden met succes besmet met miracidia <i>Cotylurus erraticus</i>. Bij 23°C komen de eerste cercariën na ruim drie weken uit de slakken vrij. Infectieproeven met metacercarien werden uitgevoerd bij <i>Larus argentatus</i>. De prepatente periode is drie dagen. <i>Larus argentatus</i> blijkt resistentie te kunnen ontwikkelen tegen <i>C. erraticus</i>. De cercarie van <i>Cotylurus erraticus</i> wordt uitvoerig beschreven. Deze verschilt in belangrijke details van de door Olson (1970) beschreven cercarie uit <i>Valvata lewisis</i> en vertoont grote gelijkenis met de reeds bekende cercarien uit het door Odening (1969) beschreven subgenus <i>Ichthyocotylurus</i>. De oriëntatie van de cercarie in het preparaat is van belang voor een juiste determinatie.","BibLvlCode":"MS","StandardTitle":"De levenscyclus van <i>Cotylurus erraticus</i> (Rudolphi, 1809) (Trematoda, Strigeidae) in het noordelijk deel van het IJsselmeer en enige opmerkingen over twee verwante trematoden-soorten","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2025-07-22 01:33:06.175990","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1974,"DateUpdate":"2025-07-15","DateCreate":"2001-07-09","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":13057,"ISBN":null,"PubliDate":1974,"IssueDate":null,"Volume":"1974","Issue":"9","Pagination":"57","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5697,"SerRR":"NIOZ-rapport. 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