Sökning: "Snail"

Visar resultat 21 - 25 av 39 avhandlingar innehållade ordet Snail.

  1. 21. The effects of crayfish on interactions in freshwater benthic communities

    Författare :Per Nyström; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; exotic species; trophic cascades; omnivory; crayfish; Trophic interactions; freshwater; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Sammanfattning : This thesis examines how freshwater crayfish affect community interactions in benthic food webs. I have mainly studied the influence of the introduced signal crayfish (Pacifastacus leniusculus) on littoral communities, but also the influence of the native noble crayfish (Astacus astacus). LÄS MER

  3. 22. Functional Morphology of Gastropods and Bivalves

    Författare :Jenny Sälgeback; Lars Holmer; John S. Peel; Jan-Ove Ebbestad; Enrico Savazzi; Anders Warén; Uppsala universitet; []
    Nyckelord :Earth sciences; Gastropoda; Bivalvia; functional morphology; constructional morphology; Geovetenskap;

    Sammanfattning : Functional morphology analyzes the relationships between form and function in organisms. However, a comprehensive analysis of any organic structure requires an integrated approach to morphology. For this purpose constructional morphology was developed, where function, phylogeny and construction together explain form. LÄS MER

  4. 23. The large sialoglycoprotein of human lymphocytes

    Författare :Bernt Axelsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : L-LSGP is an abundant cell surface glycoprotein (a.m.w. intact 115—125 kdalton, desialylated 140—160 kdalton) restricted to lymphocytes in the hemopoietic system. LÄS MER

  5. 24. Evaluation of locally available feed resources for striped catfish (Pangasianodon hypophthalmus)

    Författare :Chau Thi Da; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : This thesis investigated and compared inputs and outputs, economic factors and current feed use in small-scale farming systems producing striped catfish (Pangasianodon hypophthalmus) in the Mekong Delta. The nutrient content of locally available natural feed resources for striped catfish was determined and growth performance, feed utilisation and body indices were analysed in pond-cultured striped catfish fed diets where fish meal protein was replaced with protein from local feed resources. LÄS MER

  7. 25. Signal integration between notch and hypoxia : insights into development and disease

    Författare :Maria Gustafsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Oxygen is essentially required for aerobic metabolism in most eukaryotic organisms. Therefore, it is striking that a number of tissues develop, and are maintained at low oxygen (hypoxic) conditions in the body. For instance, the human embryo is located in a hypoxic environment. LÄS MER