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[{"key": "dc.contributor.advisor", "value": "Marjom\u00e4ki, Timo", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Karjalainen, Juha", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "V\u00e4kev\u00e4, Topi", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-09-07T05:42:09Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-09-07T05:42:09Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/88932", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Made (Lota lota) on pohjoisella pallonpuoliskolla ainoa makeassa vedess\u00e4 el\u00e4v\u00e4 \nturskakala. Made on lis\u00e4tty Suomessa silm\u00e4ll\u00e4pidett\u00e4vien lajien listalle vuonna \n2019 heikenneiden kantojen vuoksi. Made kutee p\u00e4\u00e4osin talvella matalikoille ja \nrannoille, mutta osa populaatioista voi kutea kev\u00e4\u00e4ll\u00e4 syv\u00e4nteiss\u00e4. T\u00e4ss\u00e4 \ntutkimuksessa selvitettiin mateenpoikastiheyksien sek\u00e4 ajallisia ja alueellisia \nmuutoksia ett\u00e4 eroavaisuuksia. Aineisto koostui siikakalojen poikasten \ntarkkailun ohessa kertyneest\u00e4 aineistosta vuosilta 1999\u20132020. Tutkimusj\u00e4rvin\u00e4 \ntoimivat Konnevesi, Puula ja P\u00e4ij\u00e4nteen Tehinselk\u00e4. N\u00e4ytteit\u00e4 ker\u00e4ttiin ranta alueen matalimmasta vy\u00f6hykkeest\u00e4 putkihaavilla ja syvemmill\u00e4 ranta-alueilla\nsek\u00e4 ulapoilla bongo-haaveilla. N\u00e4ytteet s\u00e4il\u00f6ttiin formaliini\u2013etanoliseokseen ja \nk\u00e4siteltiin my\u00f6hemmin laboratoriossa. Aineisto analysoitiin muun muassa \nyhden ja useamman muuttujan varianssianalyyseill\u00e4 sek\u00e4 Spearmanin \nkorrelaatioanalyysill\u00e4. Tutkimuksessa selvisi, ett\u00e4 mateenpoikasia esiintyy\neniten kaikkien j\u00e4rvien matalimmassa rantavy\u00f6hykkeess\u00e4. Syvyysvy\u00f6hykkeiden \npoikastiheyksien v\u00e4liset korrelaatiot kuitenkin vaihtelivat j\u00e4rvikohtaisesti. \nN\u00e4yteruutujen v\u00e4lill\u00e4 havaittiin merkitsevi\u00e4 eroja poikastiheyksiss\u00e4. \nRunsaimmin poikasia esiintyi ruuduilla, jotka olivat habitaatiltaan suojaisia \nlahtia. Vuosittaiset poikastiheydet vaihtelivat suuresti j\u00e4rvien sis\u00e4ll\u00e4, ja t\u00e4m\u00e4n \nlis\u00e4ksi itse ruutukohtaisissa poikastiheyksiss\u00e4 oli my\u00f6s runsasta vuosien v\u00e4list\u00e4\nvaihtelua. Vuotuisissa matalimman vy\u00f6hykkeen poikastiheyksiss\u00e4 havaittiin\nKonneveden ja Puulan v\u00e4lill\u00e4 merkitsev\u00e4\u00e4 assosiaatiota, kun taas ulapan \npoikastiheydess\u00e4 merkitsev\u00e4\u00e4 assosiaatiota havaittiin vain Puulan ja Tehinsel\u00e4n \nv\u00e4lill\u00e4. Mielenkiintoista tuloksissa oli, ettei j\u00e4rvien ulapoiden ja matalimpien \nvy\u00f6hykkeiden suhteellisissa poikastiheyksiss\u00e4 havaittu merkitsev\u00e4\u00e4 eroa, vaan \nsuhteelliset tiheydet olivat jopa samankaltaisia. Tuloksista saatiin suuntaa \nmahdolliselle tavalle tehd\u00e4 mateenpoikastarkkailuita, mutta tulosten ja \nmuuttujien varmistamiseksi lis\u00e4tutkimus olisi hyv\u00e4ksi.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Burbot (Lota lota) is the sole freshwater species of gadiform family that lives in \nnorthern hemisphere. In Finland Burbot was declared vulnerable as burbot\nstocks have decreased significantly. Burbot generally spawns in shallows during \nwinter, however some populations have been shown to spawn in lake basins\nduring spring. This a study about the evolution of burbot larvae occurrence both \ntemporal and spatial changes and differences between groups. The data was\ncollected during 1999\u20132020 while tracking of Coregonus larvae as they have \nsimilar habitat in larval stage. Research lakes were lake Konnevesi, lake Puula \nand Tehinselk\u00e4 of lake P\u00e4ij\u00e4nne. Samples were collected from both littoral and \nepilimnion of the pelagic zone. Most samples were taken by boat using bongo nets, however shallow water (0\u20130,5 m) samples were taken by foot by using pipe net. All samples were preserved in formalin-ethanol mixture for later analysis in \na laboratory. The data was then analyzed using single and multiple variable \nvariance analysis and Spearman\u2019s correlation analysis. Results showed that in all \nlakes burbots were the most abundant in the shallowest part of the littoral zone. \nAt the same time, burbot larvae densities at different sample depths correlated \nvery differently depending on the lake. Larvae densities at different sampling \nsites showed significant variances. Larvae were most abundant in coves that \nwere sheltered from winds and currents. Both total larvae density and density at\nsampling sites varied greatly between the years. Correlation was found between \nlarvae densities of the shallowest sample depth of lake Konnevesi and lake Puula. \nCorrelation between larvae densities of pelagic zone between Lake Puula and \nTehinselk\u00e4. Intriguingly all research lakes seemed to have the similar percentage\nof larvae in the pelagic zone when compared to the most abundant part, the \nshallowest part of the littoral zone. Overall, results give inside to possible new \nway to monitor burbot larvae occurrence, however more studies are required to \nconfirm results and background variables that cause variation in different lakes.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2023-09-07T05:42:09Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-09-07T05:42:09Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "35", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "kalanpoikaset", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "toukkavaihe", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Vastakuoriutuneiden mateenpoikasten esiintyvyys Keski-Suomen karuissa j\u00e4rviss\u00e4", "language": "", "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-202309074966", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "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": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "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": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "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": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "made", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "turskakalat", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4rvet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesist\u00f6t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kalakannat", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "Keski-Suomi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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