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[{"key": "dc.contributor.advisor", "value": "H\u00e4m\u00e4l\u00e4inen, Heikki", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Syrj\u00e4nen, Jukka", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Uusitalo, Maria", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-12-17T11:00:45Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-12-17T11:00:45Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2015", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1506162", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/48177", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Virtavesiss\u00e4 kalojen liikkumista saattavat rajoittaa luonnostaan muodostuneet tai ihmisen rakentamat vaellusesteet. Muun muassa tienrakennuksen yhteydess\u00e4 asennetut tierummut voivat est\u00e4\u00e4 kalojen kulun osittain tai kokonaan. Kivien tai kallion aiheuttama putous tai virran mukana kulkeutuva puuaines voivat my\u00f6s synnytt\u00e4\u00e4 luonnollisen vaellusesteen. Suomessa vaellusesteit\u00e4 on kartoitettu jonkin verran, mutta varsinaista tutkimusta on tehty v\u00e4h\u00e4n. T\u00e4ss\u00e4 tutkimuksessa tutkittiin, toimivatko risupadot, pienet putoukset ja tierummut taimenen (Salmo trutta) vaellusesteen\u00e4. Taimenet (91\u2013383 mm) merkittiin mustepisteill\u00e4, Carlin-merkein tai rasvaev\u00e4leikkauksin ja siirrettiin esteen yl\u00e4puolelta sen alapuolelle. Takaisinpyyntien avulla havainnointiin uivatko kalat esteiden l\u00e4pi takaisin pyyntipaikalle. Kontrolliryhm\u00e4n kaloja siirrettiin vastaavasti esteett\u00f6m\u00e4ll\u00e4 osuudella. Kalat pyydystettiin s\u00e4hk\u00f6kalastamalla ja siirtojen sek\u00e4 takaisinpyyntien m\u00e4\u00e4r\u00e4 ja aikav\u00e4li riippuivat kohteesta. Merkint\u00e4\u2013takaisinpyynti-menetelm\u00e4 perustuu lohikaloilla havaittuun kotiutumisk\u00e4ytt\u00e4ytymiseen, jossa kalat pyrkiv\u00e4t palaamaan takaisin sinne, mist\u00e4 ne on pyydystetty. T\u00e4ss\u00e4 tutkimuksessa menetelm\u00e4 osoitti toimivan. Yhdeks\u00e4st\u00e4 kohteesta seitsem\u00e4ss\u00e4 siirretyt taimenet palasivat esteiden l\u00e4pi alkuper\u00e4iselle pyyntipaikalle. Vaellusesteen tunnistamista vaikeuttavat tapauskohtaisuus ja usean tekij\u00e4n yhteisvaikutus. Sijainti, virtausolosuhteet, yl\u00e4puolisen veden korkeusero alapuoliseen vedenpintaan, rakenteen korkeus, kaltevuus, pituus, materiaali ja vuodenaikaisvaihtelut voivat yhdess\u00e4 m\u00e4\u00e4r\u00e4t\u00e4 muodostaako rakenne vaellusesteen.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Manmade or natural obstacles can prevent fish migrations partially or totally. In Finland only some local surveys have been published concerning obstacles in stream channels. In this work I studied if road culverts, debris dams and small waterfalls prevent movements of brown trout (Salmo trutta). I used mark-recapture-method which is based on homing behaviour of salmonids. Brown trout (91\u2013383 mm) were caught by electrofishing above the obstacles. They were first marked with Alcian Blue, Carlin-tags or fin clips and then released below the obstacles. The time periods between marking and recapture varied between survey areas from a few days to one year. A control group of trout was marked and translocated in a stream section without obstacles in each stream. In most cases some proportion of marked fish returned to their original capture site. Marking, translocating and recapturing trout seemed to be a reliable method in assessing the role of obstacles in channels. More research is still needed from obstacles in Finnish circumstances.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Maria Uusitalo (maereluu) on 2015-12-17 11:00:44.124526. 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 2015-12-17T11:00:45Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201512174091.docx: 5644957 bytes, checksum: 94547cccedddbc47622f4d5fb5188c5a (MD5)\r\nlicense.html: 4907 bytes, checksum: 6c33774e7ba5205420beac7aad3bc34b (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-12-17T11:00:45Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201512174091.docx: 5644957 bytes, checksum: 94547cccedddbc47622f4d5fb5188c5a (MD5)\r\nlicense.html: 4907 bytes, checksum: 6c33774e7ba5205420beac7aad3bc34b (MD5)\r\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (41 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": "kotiutumisk\u00e4ytt\u00e4ytyminen", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "lohikalat", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Salmo trutta", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "taimen", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "vaelluseste", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Risupadot, putoukset ja tierummut taimenen (Salmo trutta) vaellusestein\u00e4 pieniss\u00e4 virtavesiss\u00e4 : kotiutumisk\u00e4ytt\u00e4ytymiseen perustuva tutkimus", "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-201512174091", "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": 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