Sökning: "Lake Tåkern"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Lake Tåkern.

  1. 1. Impact of the Warm Summer of 2018 on Growth of Roach (Rutilus rutilus) in Lake Tåkern, Sweden

    Kandidat-uppsats, Linköpings universitet/Biologi

    Författare :Emil Pedersen; [2020]
    Nyckelord :Age group; Aging; Annual length increment; Climate Change; Population; Roach; Scales; Temperature;

    Sammanfattning : Climate change will lead to higher temperatures and longer summers in the future, which will likely influence the growing season of fish living in temperate lakes. The warm summer of 2018 in Sweden matches prognoses for normal summers at the end of the century and can thus be used to investigate the effect of temperature related factors on fish growth. LÄS MER

  3. 2. Val av uppehållsplats hos betande gäss under häckning i jordbrukslandskapet vid sjön Tåkern : betydelsen av avstånd till vatten, träd, vägar och bebyggelse

    Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Filip Svensson; [2020]
    Nyckelord :goose; Tåkern; field; nesting; grazing; buildings; trees; water;

    Sammanfattning : There are a number of species of geese in Sweden that can be found in large flocks during spring migration, but are also relatively numerous during breeding. The accumulation of geese can cause damage to growing crops, something that costs farmers and the state a large amount annually. LÄS MER

  4. 3. Changes in the fish community in Lake Tåkern, Sweden - a comparison between 1978-1979 and 2019

    Master-uppsats, Linköpings universitet/Biologi

    Författare :Manfred Skog; [2020]
    Nyckelord :Fish community; Shallow lakes; Test-fishing; Establishment of species; Crucian carp; Bream; Winter hypoxia;

    Sammanfattning : Climate changes alter species composition in both aquatic and terrestrial ecosystems. For establishment of species in a fish community, dispersal barriers, habitat structure and interactions between species act as a filter. LÄS MER

  5. 4. Har det skett en förändring i abborrens (Perca fluviatilis) tillväxt i sjön Tåkern mellan år 1978 jämfört med år 2019?

    Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Skorsdal Felicia; [2020]
    Nyckelord :Ageing; Body length increment; Cormorant; Competition; European perch; Growth; Perca fluviatilis;

    Sammanfattning : The growth in perch (Perca fluviatilis) is generally slow but varies depending on living conditions. For instance, growth is more rapid in warmer water temperature and when there is reduced intra- and interspecific competition for food. LÄS MER

  7. 5. The effect of an anti-depressant on responses to predation in an isopod

    Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Lisa Andrésen; [2019]
    Nyckelord :Anti-predation behaviour; Asellus aquaticus; fluoxetine; predation; waste-water;

    Sammanfattning : A lot of chemicals and pharmaceutical substances used by humans, are released into the waste-water and end up in lakes and ponds. Further, because pharmaceutical substances are increasing worldwide, the problem increases. A very common human anti-depressant is fluoxetine which is found in lakes, ponds and even in the bodies of aquatic organisms. LÄS MER