{"refrec":{"BRefID":12992,"RR":"<b>Heessen, H.J.L.</b> (1972). Levenscyclus en systematiek van drie nauw verwante <i>Cotylurus</i>-soorten (Trematoda, Strigeidae). <i>NIOZ-rapport</i>, 1972(18). Nederlands Instituut voor Onderzoek der Zee: Texel. 41 pp.","BEntID":12992,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>NIOZ-rapport</i>, 1972(18). Nederlands Instituut voor Onderzoek der Zee: Texel.  41 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Heessen, H.J.L.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Heessen, H.J.L.","Englishabstract":"<i>Acerina cernua</i>, collected in December 1971 and January 1972 from the IJsselmeer, was infected with <i>Tetracotyle ovata</i> (body cavity and pericardial cavity) and <i>T. percaefluviatilis</i> (air-bladder), <i>Osmerus eperlanus</i>, from the same lake, was infected with <i>Tetracotyle intermedia</i> (pericardial cavity) and to a lower intensity with <i>Tetracotyle ovata</i>. When ingested by <i>Larus argentatus</i> the metacercariae developed to patent adults: <i>Tetracotyle ovata</i> to <i>Cotylurus p. platycephalus</i> (cloaca) <i>T. percaefluviatilis</i> to <i>C. variegatus</i> (small intestine) <i>T. intermedia</i> to <i>C. erraticus</i> (small intestine). Eggs were collected from <i>Cotylurus p. platycephalus</i> and <i>C. variegatus</i>. After 21 -23 days at 20°C embryos were fully developed. Mother and daughter sporocysts developed in the operculate snail, <i>Valvata piscinalis</i>. Cercaria emerged 12 weeks after infection. Some type of immunity develops in gulls infected several times in the laboratory.","AbstractOtherLang":"<i>Acerina cernua</i>, afkomstig uit het noordwestelijke deel van het IJsselmeer, bleek te zijn besmet met <i>Tetracotyle ovata</i> (cysten vooral tussen de ingewanden en in het hartzakje) en met <i>T. percaefluviatilis</i> (cysten vooral in de zwemblaaswand). <i>Osmerus eperlanus</i>, uit hetzelfde gebied, was hoofdzakelijk besmet met <i>Tetracotyle intermedia</i> (vooral in het hartzakje) en in geringe mate met <i>Tetracotyle ovata</i>. Met deze metacercariën werden bij <i>Larus argentatus</i>experimentele infekties uitgevoerd. Uit <i>Tetracotyle ovata</i> ontwikkelde zich in de kloaka van de proefdieren <i>Cotylurus p. platycephalus</i>. Uit <i>T. percaefluviatilis</i> ontwikkelde zich in de dunne darm <i>C. variegatus</i> en uit <i>T. intermedia</i>, eveneens in de dunne darm <i>C. erraticus</i>. Van <i>Cotylurus p. platycephalus</i> en <i>C. variegatus</i> werden eieren verzameld. Na 21 - 23 dagen incubatie bij 20°C waren de embryo's volledig ontwikkeld. Wanneer de eieren daarna drie dagen bij 5°C waren bewaard, werden de miracidiën tot uitkomen gebracht. De miracidiën ontwikkelen zich tot sporocysten in op het laboratorium gekweekte juveniele exemplaren van <i>Valvata piscinalis</i>. Bij de op het Ijsselmeer verzamelde slakken werden geen besmette exemplaren gevonden. Twaalf weken na infectie van de <i>Valvata</i> werden de eerste cercariën waargenomen. Uit resistentieproeven met metacercariën van <i>Cotylurus p. platycephalus</i> en <i>C. variegatus</i> bij <i>Larus argentatus</i> en <i>Larus fuscus</i> bleek resistentie tegen <i>Cotylurus</i> op te kunnen treden. Dit in tegenstelling tot de negatieve resultaten van Odening (1970, 1971).","BibLvlCode":"MS","StandardTitle":"Levenscyclus en systematiek van drie nauw verwante <i>Cotylurus</i>-soorten (Trematoda, Strigeidae)","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":1972,"DateUpdate":"2025-07-15","DateCreate":"2001-07-06","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":12992,"ISBN":null,"PubliDate":1972,"IssueDate":null,"Volume":"1972","Issue":"18","Pagination":"41","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5697,"SerRR":"NIOZ-rapport. Netherlands Institute for Sea Research (NIOZ): Den Burg.  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