Sökning: "Gammarus"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet Gammarus.

  1. 1. Storleksstrukturerad konkurrens vid hummertinor

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Joanna Haffling; [2023]
    Nyckelord :europeisk hummer; konkurrens; dominansbeteende; BORIS; MPA;

    Sammanfattning : De flesta arter med ett kommersiellt värde i våra hav hotas idag av ett överfiske. Ett sätt att säkerställa målarternas överlevnad är genom en hållbar fiskeriförvaltning och populationsövervakning. LÄS MER

  3. 2. Spatial and temporal variations in stable isotope signatures (δ13C and δ15N) of the gammarids and the common carp in the southern coast of the Caspian Sea

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Nazila Hajizadeh Koupayeh; [2020]
    Nyckelord :carbon stable isotope; Caspian sea; Cyprinus carpio; food webs; Gammarus aequicauda; nitrogen stable isotope; Pontogammarus maeoticus;

    Sammanfattning : Despite the growing body of research on the use of stable isotope analysis in food web studies, spatial and temporal variations in stable isotope ratios of coastal communities are still poorly understood. The aim of my study is to explore how carbon and nitrogen stable isotopes of selected benthic communities vary spatially and temporally across the south of Caspian Sea. LÄS MER

  4. 3. Förekomst av mikroplaster i tångmärlor (Gammaridae) längs södra Hallandskusten

    Kandidat-uppsats, Högskolan i Halmstad

    Författare :Joakim Karlsson; [2020]
    Nyckelord :plastic; plastics; microplastics; microplastic; Amphipoda; gammarid; gammarids; Gammaridae; Gammarus; Halland; Skåne; rural; urban; biology; aquatic biology; Falkenberg; Ugglarp; Halmstad; Laxvik; Båstad; Kattvik; Sweden; trophic transfer; plast; plaster; mikroplaster; mikroplast; tångmärlor; tångmärla; Gammaridae; Gammarus; gammarid; gammarider; märlkräfta; märlkräftor; Amphipoda; Halland; Skåne; landsbygd; stad; biologi; akvatisk biologi; Falkenberg; Ugglarp; Halmstad; Laxvik; Båstad; Kattvik; Sverige; trofisk överföring;

    Sammanfattning : Since the middle of the 20th century, scientists have observed that marine organisms ingest plastics in various shapes, directly or through food. Plastics smaller than 5 millimetres, called microplastics, have in recent years gained more attention and been found to accumulate environmental toxins. LÄS MER

  5. 4. Does an evolutionary change in the water sowbug Asellus aquaticus L. alter its functional role?

    Master-uppsats, Ekologi; Tekniska högskolan

    Författare :Md. Maidul Islam Choudhury; [2011]
    Nyckelord :Asellus aquaticus; eco-evolutionary dynamic; ecosystem process; Gammarus pulex; intra-specific; inter-specific.;

    Sammanfattning : The ecology behind evolutionary diversification is a well studied area of research, whereas the effects of evolution on ecosystems get little attention. In line with ecological theory, evolutionary diversification of a species could influence different ecosystem aspects such as food web composition, energy flow, nutrient cycling etc. LÄS MER

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

    Master-uppsats, Ekologi

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

    Sammanfattning : 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. LÄS MER