Essays about: "öring"

Showing result 11 - 15 of 29 essays containing the word öring.

  1. 11. Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety?

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Jonathan Nordin; [2020]
    Keywords : bubble barrier; non-physical barrier; fish passage; fish migration; hydropower; bubbelbarriär; icke-fysisk fiskledare; lax; öring; fiskvandring; vattenkraft;

    Abstract : Loss of connectivity in riverine systems due to construction of hydropower dams has resulted in a worldwide decline of anadromous salmonid species such as Atlantic salmon (Salmo salar L.) and sea trout (Salmo trutta L.). The future of these species depend on the presence of available spawning habitat in freshwater river systems. READ MORE

  3. 12. Restaureringens betydelse för insekter i strandzonen

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Oskar Johansson; Isak Landström; [2019]
    Keywords : akvatiska insekter; fisk; flottning; makroevertebrat; vattenekologi; älv;

    Abstract : Flottningen har varit en dominerande del av transporten för skogsråvara sedan skogsindustrierna började växa fram under mitten av 1800-talet. Trots att flottningen idag har upphört är effekterna fortfarande kvarvarande efter den flottledsrensning som utfördes i vattendragen. READ MORE

  4. 13. Ice cover and spatial distribution of trout (Salmo trutta) in a small stream

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Teemu Collin; [2018]
    Keywords : Salmo trutta; spatial distribution; effect of ice-cover; ice-cover; Öring; rumsliga utbredning; Salmo trutta; istäcke;

    Abstract : Winter has been generally considered as a bottleneck period for salmonid populations, but recent studies show it might be more context related. The purpose of this study was to examine how surface ice changes spatial distribution of juvenile one-year-old brown trout in a small boreal stream. READ MORE

  5. 14. Frequency regulation and its effects on fish stranding : A hydrological modelling example of a Swedish river

    University essay from KTH/Industriell ekologi

    Author : Johanna Ewertzh; [2017]
    Keywords : ;

    Abstract : This is a master thesis aiming to answer how frequency regulation at a specific hydropower plant affect the risk of stranding for two common Swedish fish species: Trout and Grayling (Salmo trutta and Thymallus thymallus). The study comprises a literature review and a hydrological modelling in primarily Hec-Ras. READ MORE

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

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

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

    Abstract : 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. READ MORE