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[{"key": "dc.contributor.advisor", "value": "Marjom\u00e4ki, Timo", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Keskinen, Tapio", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Haapala, Saara-Maria", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2016-05-20T08:38:39Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2016-05-20T08:38:39Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2016", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1541804", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/49860", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Muikun kasvunopeudessa on suurta vaihtelua, mik\u00e4 voi heijastua my\u00f6s sen luutuvien osien rakenteeseen. Veden l\u00e4mp\u00f6tila vaikuttaa ravinnonottoon sek\u00e4 aineenvaihduntaan ja sit\u00e4 kautta my\u00f6s kasvuun. Jos gametogeneesin aikana naaraiden ja koiraiden k\u00e4ytt\u00e4ytyminen sek\u00e4 energiank\u00e4ytt\u00f6 poikkeavat toisistaan, sukupuolten v\u00e4lisi\u00e4 eroja voidaan mahdollisesti havaita my\u00f6s suomun kasvurytmiikassa. T\u00e4m\u00e4n tutkimuksen tavoitteena oli selvitt\u00e4\u00e4, miten kasvurenkaiden muodostuminen eroaa sukupuolten ja ik\u00e4ryhmien v\u00e4lill\u00e4 sek\u00e4 millaisia vaikutuksia l\u00e4mp\u00f6tilan vaihteluilla on kasvurenkaiden m\u00e4\u00e4r\u00e4\u00e4n. N\u00e4ytekalat saatiin Etel\u00e4-Konnevedelt\u00e4 avovesikaudella 2013. Kaikilta kaloilta laskettiin suomun kasvurenkaiden lukum\u00e4\u00e4r\u00e4 sek\u00e4 mitattiin kasvurenkaiden v\u00e4liset et\u00e4isyydet. Ik\u00e4ryhm\u00e4n 2+ kaloilla oli suurempi suomun s\u00e4de ja enemm\u00e4n kasvurenkaita kuin ik\u00e4ryhm\u00e4n 1+ kaloilla. Viimeisen kasvukauden kasvurenkaat olivat ik\u00e4ryhm\u00e4n 1+ kaloilla leve\u00e4mpi\u00e4 kuin ik\u00e4ryhm\u00e4n 2+ kaloilla. Naarailla oli enemm\u00e4n kasvurenkaita kuin koirailla ensimm\u00e4isen kasvukauden j\u00e4lkeen, mutta koiraille oli syntynyt enemm\u00e4n kasvurenkaita toisella kasvukaudella. Erot saattoivat johtua siit\u00e4, ett\u00e4 kahdessa lokakuussa pyydetyss\u00e4 n\u00e4yteryhm\u00e4ss\u00e4 oli kutualueille luultavasti muista osista j\u00e4rve\u00e4 tulleita koiraita. Kasvurenkaiden tihentyminen alkoi hein\u00e4-elokuussa. Tihentymisen alkaminen voi johtua kasvun hidastumisesta, ravinnon m\u00e4\u00e4r\u00e4n v\u00e4henemisest\u00e4, liian korkeasta l\u00e4mp\u00f6tilasta tai kutemiseen valmistautumisesta. Useilla kaloilla uuden kasvukauden aikana syntyneit\u00e4 kasvurenkaita ei n\u00e4y viel\u00e4 kes\u00e4kuussakaan, vaikka j\u00e4\u00e4t olisivat l\u00e4hteneet jo toukokuun alkupuolella. T\u00e4t\u00e4 tietoa voidaan k\u00e4ytt\u00e4\u00e4 hy\u00f6dyksi i\u00e4nm\u00e4\u00e4rityksi\u00e4 teht\u00e4ess\u00e4 ja n\u00e4in v\u00e4ltt\u00e4\u00e4 kalojen i\u00e4n m\u00e4\u00e4ritt\u00e4minen systemaattisesti liian nuoreksi. L\u00e4mp\u00f6tilan vaikutuksesta kasvurenkaiden muodostumiseen tarvitaan lis\u00e4tutkimuksia.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The growth rate of vendace varies a lot, which can reflect to the ossified parts of the fish. Water temperature affects food intake and metabolism and thereby also growth. If there are differences in female and male behavior and energy focusing during the gametogenesis it might be possible to detect differences also in circulus formation. The purpose of this study was to find out how circulus formation of the scale differs between sexes and age groups and also to find out how temperature affects number of circuli. Vendace were caught during the open water season 2013 from Lake Etel\u00e4-Konnevesi. Number of all growth rings and spacing of circuli were calculated. Fish in age group 2+ had more growth rings and wider spacings in scales than fish in age group 1+. Fish in age group 1+ had wider growth rings in their latest growing season than fish in age group 2+. Females had more growth rings after their first growing season but males had more growth rings in their second growing season. In two groups that were caught in October there were probably males that had come to the spawning area from other parts of the lake. It might have caused the observed difference. Densification of the growth rings started in July-August. It could have been a result from slower growth rate, decrease in food amount, high temperature or fish might have been preparing to spawn. Many vendace didn\u2019t have new visible growth rings at all in June. This information can be used in age determinations and it can be possible to avoid determining ages systematically too young. The effect of temperature on the circuli formation needs further studies.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Saara Haapala (sahaapal) on 2016-05-20 08:38:38.452710. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2016-05-20T08:38:39Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201605202633.pdf: 904697 bytes, checksum: 7546dffecd73bfbd05ae5d597a8e01bd (MD5)\r\nlicense.html: 4853 bytes, checksum: 34eb10b427527ab650f186be08470dec (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2016-05-20T08:38:39Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201605202633.pdf: 904697 bytes, checksum: 7546dffecd73bfbd05ae5d597a8e01bd (MD5)\r\nlicense.html: 4853 bytes, checksum: 34eb10b427527ab650f186be08470dec (MD5)\r\n Previous issue date: 2016", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (32 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": "Etel\u00e4-Konnevesi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "i\u00e4nm\u00e4\u00e4ritys", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kasvurengas", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "takautuva kasvunm\u00e4\u00e4ritys", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "vuosirengas", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Muikun (Coregonus albula) suomun kasvuun ja kasvurenkaiden muodostumiseen vaikuttavia tekij\u00f6it\u00e4", "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-201605202633", "language": null, "element": "identifier", "qualifier": "urn", "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"}, 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