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[{"key": "dc.contributor.author", "value": "Aaltonen, Marjo", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2011-06-16T12:41:33Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2011-06-16T12:41:33Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2011", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1162817", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/27191", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Ichthyocotylurus pileatus on ahvenkaloissa yleinen imumatoloinen, jonka el\u00e4m\u00e4nkiertoon kuuluu 3 is\u00e4nt\u00e4\u00e4. P\u00e4\u00e4is\u00e4nt\u00e4 on kalaa ravinnokseen k\u00e4ytt\u00e4v\u00e4 lintu, 1. v\u00e4li-is\u00e4nt\u00e4 on liejukotiloihin kuuluva Valvata macrostoma \u2013kotilo, jonka kautta loinen parveilee veteen ja tunkeutuu 2. v\u00e4li-is\u00e4nt\u00e4\u00e4ns\u00e4 kalaan (Perca fluviatilis). Loisen yleisyydest\u00e4 huolimatta sen el\u00e4m\u00e4nkiertopiirteit\u00e4 ei tunneta kovin hyvin. Ty\u00f6ni p\u00e4\u00e4tavoite oli selvitt\u00e4\u00e4 mitk\u00e4 tekij\u00e4t vaikuttavat siihen, ett\u00e4 Ichthyocotylurus -imumatoloisten esiintyminen on niin yleist\u00e4 ja runsasta makeanveden kaloissa, vaikka loisten siirtyminen is\u00e4nn\u00e4st\u00e4 toiseen on yleisesti ottaen ep\u00e4todenn\u00e4k\u00f6ist\u00e4. N\u00e4it\u00e4 tekij\u00f6it\u00e4 selvitin tutkimalla Valvata macrostoma -kotiloiden populaatiodynaamiikkaa, I. pileatus \u2013loisen esiintymist\u00e4 V. macrostoma -kotiloissa eri syvyysvy\u00f6hykkeiss\u00e4, transmission vuodenaikaisuutta sek\u00e4 kerkaria-tuotannon rytmiikkaa ja kerkarioiden ominaisuuksia. Tutkimuksessa selvisi, ett\u00e4 kotiloiden kokojakaumat vaihtelivat kuukausittain sek\u00e4 matalassa (1-2 m), ett\u00e4 syv\u00e4ss\u00e4 (5-6 m) vedess\u00e4 tutkimusjakson aikana touko-lokakuussa 2007. Kokojakaumien dynamiikka kuukausittain oli kuitenkin verrattain samanlainen sek\u00e4 1-2 metrin, ett\u00e4 5-6 metrin syvyydess\u00e4, mutta syv\u00e4ll\u00e4 kotilot olivat keskim\u00e4\u00e4rin pienempi\u00e4 kuin matalassa (Mann-Whitneyn U-testi; Z=-5,536, p < 0,001). Syv\u00e4ll\u00e4 Ichthyocotylurus -infektio kotilopopulaatiossa oli suurimmillaan hein\u00e4kuussa (36,8 %) ja pienimmill\u00e4\u00e4n syys-lokakuussa (2,0 % ja 2,5 %). Prevalenssi (loisintaprosentti) oli syv\u00e4ll\u00e4 korkeampi kuin matalassa koko tutkimusjakson ajan. Toukokuussa infektiot olivat kehittyvi\u00e4 sek\u00e4 syv\u00e4ss\u00e4, ett\u00e4 matalassa. Kerkarioiden parveilu alkoi kes\u00e4kuussa, jolloin parveilevien kotiloiden osuus oli matalassa 1 % ja syv\u00e4ll\u00e4 6,9 %. Huomattavana erona havaittiin, ett\u00e4 hein\u00e4-elokuussa matalassa ei havaittu lainkaan I. pileatus \u2013loista, kun samaan aikaan syv\u00e4ll\u00e4 parveilu oli voimakkaimmillaan. Parveilevien kotiloiden (n= 15) keskim\u00e4\u00e4r\u00e4inen kerkariatuotanto oli laboratoriossa 166 \u00b1 12.8 (S.E.) kerkariaa p\u00e4iv\u00e4ss\u00e4 48 p\u00e4iv\u00e4n tutkimusjakson aikana. Huippunsa parveilu saavutti klo 23:00, jonka j\u00e4lkeen se alkoi laskea. I. pileatus -kerkarioiden elinik\u00e4 osoittautui melko korkeaksi verrattuna muihin imumatoloislajeihin. Kuudentoista tunnin j\u00e4lkeen elini\u00e4n seurannan aloittamisesta 60 %:a tutkimuksen kerkarioista (n=20) oli elossa, jonka j\u00e4lkeen kuolleisuus laski lineaarisesti. Viimeinen kerkaria kuoli 76 tunnin j\u00e4lkeen. Loisen el\u00e4m\u00e4nkierto seuraa tehokkaasti is\u00e4ntiens\u00e4 el\u00e4m\u00e4n vaiheita, mik\u00e4 on mahdollistanut sen, ett\u00e4 transmissio 1. Ja 2. v\u00e4li-is\u00e4nn\u00e4n v\u00e4lill\u00e4 onnistuu hyvin. Tunnettaessa loisen kehittyminen ja vaiheet kotiloissa, voidaan ennakoida mahdollinen loisen riski levit\u00e4 esimerkiksi ahvensukuisien kalojen viljely-yksik\u00f6ihin ja est\u00e4\u00e4 se.", "language": null, "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Marjo Aaltonen (masujyrk) on 2011-06-16 12:41:28.875051. Form: Pro gradu -lomake (1 tekij\u00e4) (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake-1-tekijae). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2011-06-16T12:41:33Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-2011061611024.pdf: 381952 bytes, checksum: 7b6884609a7d071b89fcdd0f6bd7cf9d (MD5)\nlicense.html: 5048 bytes, checksum: cb9948d98a3d335c4b6bc0985c28af86 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2011-06-16T12:41:33Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-2011061611024.pdf: 381952 bytes, checksum: 7b6884609a7d071b89fcdd0f6bd7cf9d (MD5)\nlicense.html: 5048 bytes, checksum: cb9948d98a3d335c4b6bc0985c28af86 (MD5)\n Previous issue date: 2011", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "26 sivua", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "v\u00e4li-is\u00e4nn\u00e4t", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kerkaria", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Ichthyocotylurus pileatus -imumatoloisen esiintyminen ja el\u00e4m\u00e4nkiertopiirteet Valvata macrostoma -kotiloissa", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-2011061611024", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.dcmitype", "value": "Text", "language": "en", "element": "type", "qualifier": "dcmitype", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Akvaattiset tieteet", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Aquatic sciences", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4012", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kotilot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "loiset", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "liejukotilo", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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