0000000000480779

AUTHOR

Silje Halvorsen

showing 2 related works from this author

Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the s…

2020

Abstract The European eel (Anguilla L.) is considered critically endangered by the IUCN Red List, and recruitment remains low. One of the challenges for the species today is migration barriers that limit their habitat. Along the Norwegian coast, like in other countries, the abundance of eels appears to decrease with distance from the sea. This pattern may be a result of factors like water temperature, water quality, competition, and habitat suitability and availability. This study aims to use environmental DNA (eDNA) analysis to investigate the potential relationship between migration barriers and the decreasing occurrence of eels in distance from the sea by the coast of southern Norway. Si…

Passage barriers0106 biological sciencesanimal structuresmedia_common.quotation_subjectEnvironmental DNAConservation010603 evolutionary biology01 natural sciencesCompetition (biology)Upstream and downstream (DNA)Critically endangeredAbundance (ecology)lcsh:QH540-549.5VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470IUCN Red ListEnvironmental DNAEcology Evolution Behavior and SystematicsNature and Landscape Conservationmedia_commonEcology010604 marine biology & hydrobiologyFisheryGeographyHabitatAnguilla Anguillalcsh:EcologyWater qualityReal-time PCRGlobal Ecology and Conservation
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Kartlegging av vandringshindre og kvantifisering av europeisk ål (Anguilla anguilla) ved bruk av miljø-DNA

2019

Masteroppgave akvatisk økologi BIO500 - Universitetet i Agder 2019 Europeaneel (Anguilla anguilla) is an endangered species nationally and internationally, and the EU-Commissionhas decided that conservation effort is needed. One of the challenges in Norway is obstacles in migration routes, especially where riversareput in pipes underneath roads. In addition, knowledge regarding biomass is essential in conservation work. In this study, environmental DNA (eDNA) has been investigated as a tool for mapping migration obstaclesfor eel.The possibility of usingindividual differences in eDNAto separate individuals, as an estimation of biomass, was also investigated. eDNA is DNA that organisms shed t…

VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921BIO500
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