Sökning: "sculpin"

Hittade 4 uppsatser innehållade ordet sculpin.

  1. 1. Can cormorants be used as indicators of local fish abundances? : A diet study of cormorants on Gotland

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Oliver Kai Hansen; [2021]
    Nyckelord :cormorants; Baltic; Gotland; human-wildlife conflict;

    Sammanfattning : Human wildlife conflicts can represent missed opportunities for ecological monitoring, including tracking invasive species. The great cormorant Phalacrocorax carbo sinensis is the centre such a conflict, where the lack of concrete scientific evidence is often replaced by anecdotal evidence, leading to the vilification of these birds. LÄS MER

  3. 2. Impact of Great cormorant (Phalacrocorax carbo sinensis) on post-smolt survival of hatchery reared salmon (Salmo salar) and sea trout (Salmo trutta)

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

    Författare :Carolina Gavell; [2018]
    Nyckelord :great cormorant; salmon; sea trout; sea trout; grey seal; post-smolt survival;

    Sammanfattning : To compensate for the losses due to altered stream habitat large amounts of hatchery-reared Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) are released into the Baltic Sea each year. During the last decades there have been an overall declining trend in the post-smolt survival of both hatchery reared and wild salmon in the Baltic Sea. LÄS MER

  4. 3. A diet study of post-breeding Great cormorants (Phalacrocorax carbo sinensis) on Gotland

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

    Författare :Anton Larsson; [2017]
    Nyckelord :Baltic sea; regurgitated pellets; otoliths; prey species composition; sea birds;

    Sammanfattning : The Swedish population of great cormorant (Phalacrocorax carbo sinensis) has rapidly increased to over 40 000 breeding couples since the EU-protection 1980. Since the cormorant are high efficient predators living in large colonies, they are accused for reducing fish populations and competing with fishery. LÄS MER

  5. 4. Effekt av habitat på täthetsdynamik mellan stensimpa och ung öring i svenska vattendrag

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

    Författare :Olof Tellström; [2013]
    Nyckelord :trout; sculpin; interaction; habitat; densities;

    Sammanfattning : Öring (Salmo trutta) och stensimpa (Cottus gobio) är två vanligt förekommande arter i Sverige. En fråga som lyfts allt mer frekvent i olika artiklar och publikationer är hur dessa två arter påverkar varandra och vilka faktorer som påverkar denna interaktion. (Gabler & Amundsen 1999, Holmen et al. 2003, Elliot 2006, Hesthagen et al. LÄS MER