Sökning: "Clupea harengus"

Visar resultat 21 - 24 av 24 avhandlingar innehållade orden Clupea harengus.

  1. 21. Genetic structure of natural populations : aspects of the association between genetical and morphological variability patterns

    Författare :Ulf Lagercrantz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; populationsgenetik; Population Genetics;

    Sammanfattning : Most species comprise a number of more or less reproductively isolated subpopulations. These subpopulations may exhibit striking differences in morphology and ecology, and on the basis of those differences they are often given the rank of subspecies, race, stock, variety, etc. LÄS MER

  3. 22. SEA CHANGE : Social-ecological co-evolution in Baltic Sea fisheries

    Författare :Jonas Hentati-Sundberg; Henrik Österblom; Joakim Hjelm; Trevor Branch; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; resilience; social-ecological systems; complex adaptive systems; fisheries; Baltic Sea; Sustainability Science; vetenskap om hållbar utveckling;

    Sammanfattning : Sustainable management of natural resources requires an in-depth understanding of the interplay between social and ecological change. Linked social-ecological systems (SES) have been described as complex adaptive systems (CAS), which mean that they are irreducible, exhibit nonlinear dynamics, have interactions across scales and are uncertain and unpredictable. LÄS MER

  4. 23. Assessment of dietary patterns and prey consumption of marine mammals: Grey seals (Halichoerus grypus) in the Baltic Sea

    Författare :Karl Lundström; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; grey seal; Halichoerus grypus; Baltic Sea; diet; predation; fish; consumption; fatty acid signature analysis; bioenergetics; foraging ecology;

    Sammanfattning : The Baltic Sea has been severely affected by pollution and resource overexploitation during the last centuries. The grey seal (Halichoerus grypus) is a good example of how a species can be affected by such changes. LÄS MER

  5. 24. Organohalogen environmental pollutants in Baltic fish : chemical characterization and toxicological evaluation with a focus on bone disturbances

    Författare :Natalia Stern; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The present study was initiated due to concern about toxicological consequences associated with the exposure to persistent organic pollutants (POPs) via the consumption of Baltic fish. In Sweden, fish from the Baltic Sea is a major dietary source of POPs but also an important source of essential nutrients. LÄS MER