Sökning: "piscivorous"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet piscivorous.

  1. 1. Ecological impacts of dam removal in Swedish inland waters : Effects on water chemistry and fish demography

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Johanna Ekman; [2023]
    Nyckelord :biology; ecology; dam removal; Sweden; impact; inland waters; ecosystem; water chemistry; fish demography; Perca fluviatilis; European perch; biologi; ekologi; dammutrivning; Sverige; påverkan; inlandsvatten; ekosystem; vattenkemi; fiskdemografi; Perca fluviatilis; abborre;

    Sammanfattning : Dams play an important role in our society, but their negative impacts on aquatic ecosystems have led to a need for conservation efforts to mitigate the negative effects. In some instances, dam removal has been suggested to be the most economically and ecologically beneficial restoration method to improve longitudinal connectivity. LÄS MER

  3. 2. Effects of whitefish speciation on piscivorous birds : A dietary study of piscivorous birds in central and northern Sweden

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Erik Söderlund; [2021]
    Nyckelord :Coregonus lavaretus; piscivorous; birds; diet; speciation;

    Sammanfattning : The ecological communities we observe today are a product of the bidirectional interactions between ecological and evolutionary processes. Although the effects of ecological processes on population divergence and speciation have been studied extensively, far less is known about the effects of divergence and speciation on ecological dynamics. LÄS MER

  4. 3. Konkurrensen mellan röding, sik och lake i Vättern : En djupdykning i tre konsumenters födopreferenser. Två tidsperioder: 1964-1978 samt 2006-2011

    Kandidat-uppsats, Högskolan i Skövde/Institutionen för biovetenskap

    Författare :Oskar Norén; [2020]
    Nyckelord :;

    Sammanfattning : Lake Vättern contains Swedens most valuable population of arctic charr (Salvelinus umbla). The stock of this Salmonidae fish showed a negative trend for several decades but has now turned to a more positive one. LÄS MER

  5. 4. Invasive round goby, Neogobius melanostomus - suitable prey for native cod, Gadus morhua?

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Andreas Ljung; [2020]
    Nyckelord :Round goby; invasive species; cod; predator-prey inter-action;

    Sammanfattning : Invasive species is a worldwide issue that is considered to be the one of the main reasons to losses of biodiversity. The round goby, Neogobius melanostomus, is an invasive species in the Baltic Sea that originates from the Black- and Caspian Sea. LÄS MER

  7. 5. Hur påverkar storskarv (Phalacrocorax carbo) och skäggdopping (Podiceps cristatus) fisksamhället i grunda, näringsrika sjöar?

    Kandidat-uppsats, Linköpings universitet/Biologi

    Författare :Victor Spjern; [2020]
    Nyckelord :Great Cormorant; Great Crested Grebe; diet composition; foraging competition; diving predatory birds; implications from predation; prey size selection; prey species selection;

    Sammanfattning : Piscivorous birds are an integrated part of lake and coastline ecosystems. Despite decades of research it is yet unclear what influence fish eating birds have on the fish community. LÄS MER