Sökning: "Anadromous"

Visar resultat 1 - 5 av 23 uppsatser innehållade ordet Anadromous.

  1. 1. MODELLING THE SMOLT PRODUCTIVITY OF BROWN TROUT (SALMO TRUTTA) IN HAGA Å

    Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Författare :Lukas Almgren; [2023-10-30]
    Nyckelord :Brown trout; Salmo trutta; Trout habitat score; THS; Haga å; electro-fishing survey;

    Sammanfattning : The brown trout (Salmo trutta) is a facultatively anadromous species, some individuals migrate from the rearing environment in the rivers to the sea while other individuals stay in fresh water. To determine the suitability of a stream for juvenile trout the organization SGBALANST has developed what is called the "Trout habitat score" (THS) model. LÄS MER

  3. 2. Potential migration routes for the alien species, pink salmon (Oncorhynchus gorbuscha) : investigating access in west and south coast rivers of Sweden

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Rebecca Martin; [2023]
    Nyckelord :invasive; alien species; salmonid; anadromous; migration barriers;

    Sammanfattning : Invasive alien species are one of the main drivers of ecosystem change globally, presenting challenges to biodiversity that take many forms Pink salmon, Oncorhynchus gorbuscha, has recently been observed on the Swedish west coast where its presence is the result of secondary spreading from populations introduced to the White and Barents Seas in northwestern Russia. In Sweden, O. LÄS MER

  4. 3. Evaluating an increased spill regime as a management tool to improve downstream passage of salmon smolt

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Mattias Hansson; [2022]
    Nyckelord :hydraulic modeling; hydroacoustic telemetry; time to event analysis; hydraulisk modellering; överlevnadsanalys; hydroakustisk telemetri;

    Sammanfattning : The anadromous Atlantic salmon (Salmo salar) is dependent on river connectivity to reach spawning and rearing habitats in rivers. Most rivers are today fragmented by artificial barriers such as hydroelectric powerplants (HEP) which impede this migratory movement. LÄS MER

  5. 4. Fatty acid composition in salmonid eggs : a comparative study of Atlantic salmon and brown trout

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Linnéa Appert; [2022]
    Nyckelord :Salmonid eggs; Lipids; Fatty acids; Atlantic salmon; brown trout; DHA; EPA; AA;

    Sammanfattning : Atlantic salmon (AS) and brown trout (BT) are part of the salmonid family and are some of the most popular fish species in Western culture. Due to their popularity, there is incentive to understand the varying factors which ensures species survival. LÄS MER

  7. 5. Future management of Laisriver Brown trout : what life history and enhancement strategy should be prioritized?

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

    Författare :Isak Landström; [2021]
    Nyckelord :salmo trutta; acoustic telemetry; spawning migration; hatchery-reared; genetic assignment; sea-run; resident; laisälven;

    Sammanfattning : The life history and coexistence of subpopulations of brown trout in the same drainage area are relatively well known. The three forms of trout; sea-run, lake-run and resident, can all be present in the same location at some period of their life cycle, e.g. during the parr stage or at spawning. LÄS MER