Sökning: "marine biology"

Visar resultat 21 - 25 av 129 avhandlingar innehållade orden marine biology.

  1. 21. Grazing and the geographical range of seaweeds : The introduced Fucus evanescens and the newly described Fucus radicans

    Författare :Helena Forslund; Lena Kautsky; Ove Eriksson; Veijo Jormalainen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; non-indigenous species; phlorotannin; herbivore defense; ; Biology; Biologi; Marine ecology; Marin ekologi; Plant Ecology; växtekologi;

    Sammanfattning : Along the coast of temperate oceans brown algae of the genus Fucus form dense stands on rocky shores and are keystone species of the coastal ecosystem. These large seaweeds are perennial and function as substrate for many sessile marine organisms, provide shelter for fauna and juvenile fish, and are food source. A number of abiotic (e.g. LÄS MER

  3. 22. Disentangling small genetic differences in large Atlantic herring populations: comparing genetic markers and statistical power

    Författare :Lena C. Larsson; Linda Laikre; Nils Ryman; Lorenz Hauser; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; conservation genetics; marine fish; spatial and temporal genetic variation; molecular marker comparison; allozyme; microsatellite; selection; fisheries management; Biology; Biologi; populationsgenetik; Population Genetics;

    Sammanfattning : Genes are the foundation of evolution and biodiversity. The genetic structure of natural populations needs to be understood to maintain exploited resources rationally. This thesis focuses on genetic variability and methods to determine spatial and temporal genetic heterogeneities. LÄS MER

  4. 23. Costa Rican coffee and bananas : A social-ecological study of management practices and their effects on the environment

    Författare :Angelina Sanderson Bellamy; Micheal Tedengren; Charles Francis; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Costa Rica; coffee; banana; production system; pesticides; organic; conventional; Rainforest Alliance certification; Biology; Biologi; marin ekotoxikologi; Marine Ecotoxicology;

    Sammanfattning : This thesis investigates the variability in management practices on coffee and banana farms in an attempt to identify practices that reduce the environmental impact of export crop production. Different banana production systems are studied to determine their level of environmental impact. LÄS MER

  5. 24. Molecular biology of barnacle Balanus improvisus settlement

    Författare :Anna Abramova; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; barnacles; settlement; transcriptomics; ecdysone cascade; chemosensory receptors; waterborne pheromones;

    Sammanfattning : The aim of this thesis was to investigate molecular mechanisms of various aspects of barnacle settlement, using the acorn barnacle Balanus improvisus. This barnacle is a common fouling species and a model organism for studies in settlement biology, in particular in relation to antifouling research. LÄS MER

  7. 25. HABITAT CHOICE OF BENTHIC SHRIMPS - Results and discussions on shrimp sampling from the Gullmar Fjord on the Swedish west coast, the Faeroe Islands, Inhaca Island in southern Moçambique and the shelf slope of the Bahamas

    Författare :Matz S. Berggren; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Marine caridea; associated shrimps; Habitat choice;

    Sammanfattning : .... LÄS MER