Search for dissertations about: "fish reduction."

Showing result 1 - 5 of 67 swedish dissertations containing the words fish reduction..

  2. 1. Does fish health matter? The Utility of Biomarkers in Fish for Environmental Assessment

    Author : Niklas Hanson; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biomarkers; Fish; Environmental monitoring; Ecological risk assessment; Rainbow trout; Perch;

    Abstract : Two common strategies to assess exposure to environmental toxicants are to measure chemical concentrations in the environment and to examine the presence of certain species that are known to be sensit... merive to pollution. READ MORE

  4. 2. Waterfowl in temperate eutrophic lakes - Interactions with macroinvertebrates, submerged vegetation and fish

    Author : Ola Marklund; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi; Chara; Asellus; chironomidae; ultraviolet radiation; epiphytes; predation; herbivory; diel vertical migration; fish; Waterfowl; macroinvertebrates; submerged vegetation;

    Abstract : The aim of this thesis was to explore some of the important links between waterfowl and the biota in shallow eutrophic lakes in temperate areas. Waterfowl depend on macroinvertebrates as sources of protein and calcium, which are essential for egg production and growth. Macroinvertebrates in turn depend on submerged vegetation for food and shelter. READ MORE

  5. 3. The Effects of Temperature on Gut Blood Flow and Gut Motility in Fish

    Author : Albin Gräns; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fish; thermoregulatory behaviours; electrical activity; biotelemetry;

    Abstract : In order for a fish to grow and thrive, the gut must function efficiently. This is achieved through a range of processes, including controlled patterns of gut motility and modifications in gut blood flow. How these processes are affected by long and short-term changes in ambient temperature was the main focus of this thesis. READ MORE

  6. 4. A Spatial Scale Approach to Fish Habitat Ecology and Impacted Rivers

    Author : Henry H. Hansen; Eva Bergman; Max Lindmark; Dana Infante; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fish Habitat Models; River Ecology; Novel Riverscapes; Spatial Scale; Fish Communities; Anthropogenic Impacts; Sustainability; River Management; River Restoration; Biology; Biologi;

    Abstract : Fish biodiversity in rivers is threatened by continual habitat loss. Evidence to support management and restoration of rivers requires information about the specific habitat requirements for entire fish communities. READ MORE

  7. 5. Single cell protein in fish feed: effects on gut microbiota

    Author : Andreas Nyman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : The microbiota has been shown to be important for nutrition and health. It provides the host with an extensive arsenal of dietary enzymes that can contribute to host metabolism by conversion of otherwise undigestible compounds to metabolites that the host can utilize. READ MORE