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dc.contributor.authorNeset, Philip Thomassen
dc.date.accessioned2021-09-20T07:11:33Z
dc.date.available2021-09-20T07:11:33Z
dc.date.issued2021
dc.identifier.citationNeset, P.T. (2021) Kartlegging av laks og ørret i kystvassdrag i Agder ved studier av miljø-DNA (Master's thesis). University of Agder, Kristiansand.en_US
dc.identifier.urihttps://hdl.handle.net/11250/2779002
dc.descriptionMaster's thesis in Coastal ecology (BIO501)en_US
dc.description.abstractBoth Atlantic salmon (Salmo salar) and Brown trout (Salmo trutta) spawn in freshwaters, and availability to water courses of good water quality is of great importance for the Salmonidae populations. The industrial revolution introduced release of considerable amounts of sulphur and nitrogen taken up by the environments, including aquatic habitats. Through the 20thcentury, the pH levels dramatically dropped while levels of toxic aluminium rose in the freshwaters. The acidic and toxic waters strongly affected the salmon populations, and several of the stocks of south Norwegian rivers were eliminated. The trout, however, have managed the decrease in water quality better and have remained in the water courses. The awareness surrounding the polluting releases lead to strict, industrial restrictions as well as researching on different methodologies for improving the ecological conditions. Through this research it was found that adding limestone to the waters increased the pH levels, and national liming projects were established in the mid-1990s. It has been noticed improved water quality, and increased salmon stocks in the traditionally viewed salmon rivers.en_US
dc.language.isonoben_US
dc.publisherUniversity of Agderen_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectBIO501en_US
dc.titleKartlegging av laks og ørret i kystvassdrag i Agder ved studier av miljø-DNAen_US
dc.typeMaster thesisen_US
dc.rights.holder© 2021 Philip Thomassen Neseten_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subject.nsiVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921en_US
dc.source.pagenumber62en_US


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