Sökning: "Margaritifera margaritifera"

Hittade 4 avhandlingar innehållade orden Margaritifera margaritifera.

  1. 1. Genetic Variation and Relatedness of Freshwater Pearl Mussel Margaritifera margaritifera L. populations

    Författare :Amra Hadzihalilovic-Numanovic; Larry Greenberg; Nils Ryman; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Margaritifera margaritifera; genetic variation; age structure; genetic distance; Biology; Biologi; Biology; Biologi;

    Sammanfattning : The two papers presented in this thesis focus on population genetic study on freshwater pearl mussel populations in Sweden, using RAPD method. In paper I, I examine genetic variation within and between 5 populations in a single drainage area in south western Sweden. LÄS MER

  3. 2. Ecology of freshwater mussels in disturbed environments

    Författare :Martin Österling; Larry Greenberg; Björn Arvidsson; David Strayer; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Unionoida; Margaritifera margaritifera; Dreissena; Salmo trutta; habitat degradation; turbidity; sedimentation; recruitment; conservation.; Biology; Biologi; Biology; Biologi;

    Sammanfattning : The number of species extinctions is increasing at an alarming rate. Long-lived freshwater mussels of the order Unionoida, which include a parasitic stage on a host fish, are highly threatened. Habitat degradation by turbidity and sedimentation is thought to be one major reason for their decline. LÄS MER

  4. 3. Parasite host interaction between the freshwater pearl mussel (Margaritifera margaritifera) and brown trout (Salmo trutta) – the impact from glochidia larvae on the host

    Författare :Niklas Wengström; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Parasites can modulate the physiology and behavior of the hosts to enhance their chances to complete their life cycle. The numerous freshwater bivalves of the order Unionoida all have a parasitic larval stage, also known as glochidia, parasitizing fish hosts. LÄS MER

  5. 4. Bivalve shells as environmental archives

    Författare :Elena Dunca; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Sammanfattning : Bivalves can be used as environmental biomonitors by studying the growth rate and the structure of their shells, as well as by analysing elemental distribution in the shells. Information about water chemistry, temperature and pH, about precipitation, food supply and other environmental parameters are stored in the bivalve shells. LÄS MER