Essays about: "Common roach"

Showing result 1 - 5 of 6 essays containing the words Common roach.

  1. 1. A catch-22 scenario in the Swedish food system : –A scientific examination of cyprinid fishingand its management possibilities in Sweden

    University essay from SLU/Department of Molecular Sciences

    Author : Peter Andreas Van Berlekom; [2023]
    Keywords : Cyprinids; Swedish food supply chain; fisheries management; Complex Adaptive System CAS ;

    Abstract : Cyprinid fish like roach, bream and ide are natural resources in Sweden that were common and consumed in households up to the late 19th century. Due to societal changes during the industrialization cyprinids lost their domestic importance. Today we see an increasing demand for sustainable food sources. READ MORE

  3. 2. Population dynamics of the horned grebe in constructed wetlands in Östergötland.

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Johanna Pellnor; [2021]
    Keywords : Biodiversity; Canadian pondweed; Common roach; Horned grebe; Pike; Population dynamics; Wetland;

    Abstract : The population size of the horned grebe, Podiceps auritus, is declining in most of the world due to loss of wetlands, deteriorating water quality and establishment of predatory fish such as pike, Esox lucius, in former fish free wetlands. The horned grebe is now globally classified as vulnerable. READ MORE

  4. 3. Influence of reed (Phragmites australis) belts in the Baltic Sea archipelago on pike (Esox lucius) and other coastal fish species

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Niklas Niemi; [2020]
    Keywords : Reed; Phragmites; Pike; Baltic Sea; spatial distribution; habitat utilization; reed expansion; reed management;

    Abstract : Eutrophication, near shore building and human disturbances by dredging and shore alteration have led to increased expansion of the common reed (Phragmites australis) in the archipelago of the Baltic Sea. Reed has an important ecological function such as nursery habitat for many fish species. READ MORE

  5. 4. Sustainable Resource Use of Common Bream and Roach Catch from Reduction Fishing in Östergötland

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Malin Svensson; [2014]
    Keywords : Sustainable development; Eutrophication; Reduction fishing; Biomanipulation; Waste management;

    Abstract : Nutrient inflows from anthropogenic sources into water systems are causing eutrophication, algal blooms and trophic changes in Swedish lakes and seas. The European water framework directive was implemented to regulate member countries' policies to achieve a good status in surface waters. READ MORE

  6. 5. The Effect of Synthetic Estrogen on Foraging and Predator Avoidance in the Common Roach (Rutilus rutilus)

    University essay from Lunds universitet/Miljövetenskaplig utbildning

    Author : Gustaf Boström; [2012]
    Keywords : EE2; ecotoxicology; roach; rutilus; foraging; predator avoidance; Biology and Life Sciences;

    Abstract : Synthetic estrogens that originate mainly from oral contraceptive pills reach our waters through sewage effluent and potentially affect organisms in the natural environment. This study focused on the effects of the synthetic estrogen 17-alpha-ethinylestradiol (EE2) on the foraging and predator avoidance behaviors of the planktivorous fish roach (Rutilus rutilus), a common fish in Swedish lakes and rivers. READ MORE