Sökning: "Baltic Sea stages"

Visar resultat 6 - 10 av 18 uppsatser innehållade orden Baltic Sea stages.

  1. 6. Method Development for Quantification of Different Persistent Organic Pollutants in Ringed Seal (Phoca hispida) from the Baltic Sea

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Amelie Nordström; [2016]
    Nyckelord :Ringed seal; Baltic Sea; Persistent Organic Pollutants; Sample pre-treatment;

    Sammanfattning : Persistent organic pollutants such as polychlorinated biphenyls (PCBs), DDT and polybrominated diphenyl ethers (PBDEs) tend to accumulate in biota and are transferred through the aquatic food web, which result in a high accumulation in marine mammals. In recent years various novel flame retardants (nBFRs), which have replaced the banned PBDEs, have also started to occur in the environment. LÄS MER

  3. 7. Effect of temporal increases in prey fish abundance on individual growth rates of coastal piscivores

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Johan Penner; [2016]
    Nyckelord :Three-spined stickleback; Perch; Growth; Intraguild Predation; Ontogeny; Baltic Sea.;

    Sammanfattning : Commercial fishing in the Baltic Sea has led to decrease in abundance of large predatory fish and as a result the predation pressure on smaller fish species has been reduced. Three-spined stickleback (Gasterosteus aculeatus) is among the species that have benefited from reduced predation pressure. LÄS MER

  4. 8. Storspiggens (Gasterosteus aculeatus) påverkan på abborryngel (Perca fluviatilis) via storleksberoende predation

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Alexander Hjältén; [2016]
    Nyckelord :three-spined stickleback; perch; size-dependent predation; Baltic sea; intra guild predation;

    Sammanfattning : The costal populations of perch (Perca fluviatilis) in some parts of the Baltic Sea have been in decline for about two decades. Recruitment failure in the early larval stages has been put forward as a possible cause and the decline has also been suggested to coincide with increases in three-pined stickleback (Gasterosteus aculeatus) densities. LÄS MER

  5. 9. Valuation of Ecosystem Services in Ecosystem-Based Marine Spatial Planning in the Baltic Sea Region - why, when and how?

    Master-uppsats, Lunds universitet/Internationella miljöinstitutet

    Författare :Ida Reuterswärd; [2015]
    Nyckelord :marine spatial planning; valuation of ecosystem services; Baltic Sea Region; ecosystem-based decision-making; Earth and Environmental Sciences;

    Sammanfattning : The ecosystems of the Baltic Sea are under severe pressure, threating the long-term prosperity of the region and human wellbeing. New marine management approaches need to be tested and developed. LÄS MER

  7. 10. Ascertaining the lithological boundaries of the Yoldia Sea of the Baltic Sea : a geochemical approach

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Sophie Reiche; [2014]
    Nyckelord :Baltic Sea; Yoldia Sea; lithological descriptions; X-ray fluorescence; biogenic silica; Earth and Environmental Sciences;

    Sammanfattning : When analyzing sedimentary sequences, results which are based solely on macroscopic observations, can lead to misleading and incomplete conclusions. Therefore these observations need to be complemented by analyses on a microscopic or atomic scale, such as through biological, chemical or physical methods. LÄS MER