Sökning: "electrofishing"

Visar resultat 1 - 5 av 13 uppsatser innehållade ordet electrofishing.

  1. 1. Sampling methods of the wels catfish (Silurus glanis) in freshwater lakes : management of a vulnerable species

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :David Östby; [2018]
    Nyckelord :sampling; gear; monitoring; Wels catfish; Silurus glanis; management; vulnerable spieces; electrofishing; acoustic camera; fyke nets; lake;

    Sammanfattning : Sweden hosts the northernmost natural population of wels catfish (Silurus glanis) in the world. The populations of the species decreased severely in the 20th century, mainly due to different sources of anthropogenic impact. LÄS MER

  2. 2. Using eDNA to improve environmental monitoring for water bodies effected by hydropower in Sweden

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Elin Hellmér; [2018]
    Nyckelord :eDNA; environment; environmental monitoring; hydropower; index;

    Sammanfattning : The aim of this report is to contribute to the base of knowledge on environmental monitoring by increasing understanding of how eDNA, electrofishing and sampling fishing may be used to examine fish biodiversity. It also aims at understanding if fish indexes developed within the Water Framework Directive reflect biodiversity, as well as the potential of eDNA data to serve as input to these indexes. LÄS MER

  3. 3. Fish sampling in lotic water : a study of the efficiency of the novel Nordic multi-mesh Stream Survey Net

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Anders Eidborn; [2017]
    Nyckelord :Fish sampling; NSSN; gill net; fish community;

    Sammanfattning : A free-flowing stream can offer several ecosystem services. Fish are one of these, and are an important resource for society, both as a food source and as a biological indicator of the water quality, which gives knowledge of the overall health of the stream. The lotic environment in fresh water streams is an important habitat for many fish species. LÄS MER

  4. 4. Estimation of maximum densities of young of the year brown trout, Salmo trutta, with the use of environmental factors

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Johanna Wärnsberg; [2016]
    Nyckelord :Salmo trutta; young of the year; density; environmental factors;

    Sammanfattning : Brown trout, Salmo trutta, is an important species for the sportfishing tourism in Sweden and goals are set high for the possible gains to come from fishing tourism. Therefore accurate and efficient methods to estimate a streams potential production of brown trout are needed in order to apply relevant management regimes that take fish ecology into account and prevents overfishing. LÄS MER

  5. 5. Intra and interhabitat migration in junvenile brown trout and Atlantic salmon in restored tributaries of the Vindelriver

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Matti Erikoinen; [2016]
    Nyckelord :migration; movement; temperature; pit-tag; electrofishing;

    Sammanfattning : Several techniques are used to sample juvenile salmonids in lotic environments. Electrofishing is by far the most commonly used method on the Scandinavian peninsula. LÄS MER