Essays about: "Chironomidae larvae"

Found 3 essays containing the words Chironomidae larvae.

  1. 1. Stickleback diets in bays along the northen Baltic Sea

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Douglas Skarp; [2019]
    Keywords : stickleback; perch larvae; predation; competition; bay;

    Abstract : Coastal populations of perch (Perca fluviatilis) in the Baltic Sea has declined substantially the last decades while the populations of three-spined sticklebacks (Gasterosteus aculeatus) has increased rapidly during the same time period. Earlier studies have suggested that predation on perch larvae and or competition from sticklebacks are the causes behind the decline in perch. READ MORE

  3. 2. Mouthpart deformities of Chironomid larvae as an indicator of heavy metal polluted water

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Tim Lindström Jonsson; [2019]
    Keywords : Chironomidae larvae; Deformities; Heavy metals; Biomonitoring; Mining; Northern Sweden;

    Abstract : Freshwater ecosystems are under increasing pressure from a variety of contaminants, including heavy metals from mining operations, which can have complex effects that are difficult to evaluate. To detect early warnings from elevated concentrations of metals, organisms are sought to be used as monitoring tools. READ MORE

  4. 3. How does predation from fish influence the benthic invertebrates’ species composition in the Phragmites australis and Chara vegetation of Lake Takern?

    University essay from Ekologi

    Author : Ernest Aigbavbiere; [2011]
    Keywords : Handling time; intake rate; predation; macro-invertebrates.;

    Abstract : Predation is one of the important selective factors that regulate the species composition of benthic invertebrate communities. The study objective was to investigate the invertebrate distribution in two contrasting habitats in Lake Takern, southern Sweden, submerged Chara vegetation and emergent Phragmites australis vegetation, and to investigate the influence of predation from fish on certain invertebrates. READ MORE