Search for dissertations about: "fisheries collapse"

Found 5 swedish dissertations containing the words fisheries collapse.

  1. 1. Multi-level Interactions between Fisheries and Trade : Modeling intertwined social-ecological systems

    Author : Laura G. Elsler; Schlüter Maja; Florian Diekert; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; NATURVETENSKAP; SAMHÄLLSVETENSKAP; NATURAL SCIENCES; SOCIAL SCIENCES; multi-level interactions; social-ecological model; trade relationships; complexity; inequality in fisheries; fisheries sustainability; seafood trade; international markets; fisheries collapse; vetenskap om hållbar utveckling; Sustainability Science;

    Abstract : Sustainable and equitable fisheries are central for addressing the challenges of the UN Sustainable Development Goal 14: Life Below Water. International trade, once presented by Walrasian economists as a panacea for fisheries development, has not markedly decreased poverty and has been related to the overexploitation of marine species. READ MORE

  2. 2. Seals and fisheries: a study of the conflict and some possible solutions

    Author : Sara Königson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; seals and fisheries; grey seal; coastal fisheries; harbour seal; seal-safe fishing gear;

    Abstract : Interaction between seals and fisheries along the Swedish coast has serious environmental and economic consequences. This thesis describes the conflict as it affects four different small-scale coastal fisheries; the eel fisheries on the west coast, the herring fisheries and salmon fisheries in the northern Baltic and the cod fisheries in the central Baltic. READ MORE

  3. 3. Outbreak dynamics of the spruce bark beetle Ips typographus in time and space

    Author : Simon Kärvemo; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; LANTBRUKSVETENSKAPER; NATURAL SCIENCES; AGRICULTURAL SCIENCES;

    Abstract : The European spruce bark beetle Ips typographus (L.) is one of the most important pests of mature Norway spruce Picea abies (Karst.) in Europe. Outbreaks (periods with large-scale beetle-caused tree mortality) are often triggered by large-scale stormfellings or drought, which provide a large surplus of suitable breeding material. READ MORE

  4. 4. Tree carbon partitioning, respiratory efficiency, and nitrogen acquisition

    Author : Nils Henriksson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; LANTBRUKSVETENSKAPER; NATURAL SCIENCES; AGRICULTURAL SCIENCES;

    Abstract : Tree growth in boreal systems is frequently limited by nitrogen (N) availability, and a significant portion of photosynthetically assimilated carbon (C) is partitioned to N-acquisition by roots and mycorrhizal fungi. A new method for reversibly halting tree belowground C flux was developed. READ MORE

  5. 5. Complexity and Change in a Simple Food Web : Studies in the Baltic Sea (FAO Area 27.IIId)

    Author : Henrik Österblom; Sture Hansson; Robert W Furness; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Avian cholera; Bottom-up; Bycatch; Clupea harengus; Ecosystem; Food web; Gadus morhua; Halichoerus grypus; Regime shift; Sprattus sprattus; Top-down; Trophic cascade; Uria aalge; Marine ecology; Marin ekologi;

    Abstract : An influence at one trophic level can result in dynamic impacts also on other components of a food web. These dynamics are known as trophic cascades, and can be both top-down and bottom-up. After a near-collapse of the Baltic cod Gadus morhua stock in the 1980s, its main prey sprat Sprattus sprattus increased dramatically. READ MORE