Sökning: "Gädda Sik"

Hittade 2 uppsatser innehållade orden Gädda Sik.

  1. 1. The influence of northern pike on the diet of Eurasian perch

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

    Författare :Karlberg Ylva; [2017]
    Nyckelord :Perca fluviatilis; Esox lucius; Coregonus lavaretus; trophic interactions; facilitation; Eurasian perch; northern pike; whitefish; Perca fluviatilis; Esox lucius; Coregonus lavaretus; trofiska interaktioner; facilitering; abborre; gädda; sik;

    Sammanfattning : Top predators in aquatic ecosystems often have strong top-down effects on the ecosystem. Northern pike (Esox lucius) has been documented to cause whitefish (Coregonus lavaretus) populations to diverge into different ecomorphs. LÄS MER

  3. 2. Analys av åldersstrukturen hos sik (Coregonus lavaretus) i sjöar utan gädda (Esox lucius)

    Kandidat-uppsats, Institutionen för ekologi, miljö och geovetenskap

    Författare :Martina Magnusson; [2012]
    Nyckelord :Whitefish; Sympatric speciation; Age analysis; Otoliths;

    Sammanfattning : Development of morphs within European whitefish (Coregonus lavaretus), might be considered as a beginning of a sympatric speciation process. Unpublished data suggests that presence of the keystone piscivore northern pike (Esox lucius) is the main driver of sympatric divergence in European whitefish (Coregonus lavaretus). LÄS MER