Essays about: "stabila isotoper studie"

Showing result 1 - 5 of 7 essays containing the words stabila isotoper studie.

  1. 1. Aquaculture and its effect on the wild fish resource in a Swedish lake : An evaluation of changes in fat content, protein content and trophic niche

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Emmy Nyberg; [2022]
    Keywords : Aquaculture; wild fish; fat content; protein content; stable isotopes;

    Abstract : Fish is nutritious and important as a food source for many people. It contains high levels of protein, important omega-3 fatty acids as well as micronutrients. For a sustainable fish consumption, aquaculture is needed but it can affect nearby ecosystems in many ways. READ MORE

  3. 2. Påverkar klimatförändringen trofisk fraktionering av C och N mellan växt och konsument i sötvattenekosystem?

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Evelina Hiltunen; [2018]
    Keywords : chironomus riparius; stable isotopes; trophic fractionation; climate change; oligotrophication;

    Abstract : Temperaturhöjningen som en följd av klimatförändringen väntas gå fortast och bli störst på Nord- och Sydpolen. När lufttemperaturen stiger, stiger även vattentemperaturer och vegetationsgränser flyttas. Detta skulle kunna vara orsaken till den näringsutarmning som kan ses i många arktiska sjöar. READ MORE

  4. 3. Trophic transfer of per- and polyfluoroalkyl substances (PFASs) by glacial relicts in Lake Vättern, Sweden

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Malin Bergman; [2017]
    Keywords : ;

    Abstract : The aim with the study was to assess if glacial relict amphipods constitute as vectors of transport of per- and polyfluoroalkyl substances (PFASs) in the Arctic char food web in Lake Vättern, Sweden. Sediment, surface water and biota samples were analysed for PFASs using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), and stable isotope analysis of δ 13C and δ15N was performed on sediments and biota samples. READ MORE

  5. 4. Neolithic farmers in Poland - A study of stable isotopes in human bones and teeth from Kichary Nowe in the south of Poland

    University essay from Stockholms universitet/Arkeologiska forskningslaboratoriet

    Author : Staffan Lundmark; [2016]
    Keywords : stable isotopic study; archaeological science; Neolithic in southern Poland; Kichary Nowe 2 grave-field; diet study on Neolithic bone material; stabila isotoper studie; laborativ arkeologi; neolitikum i södra Polen; Kichary Nowe 2 gravfält; dietstudie på neolitiskt benmaterial;

    Abstract : The diet of the Stone Age cultures is a strong indicator to the social group, thus farmers and hunters can be distinguished through their diet. There is well-preserved and well excavated Polish skeletal material available for such a study but the material has not previously been subject to stable isotopes analyses and therefore the questions of diets has not been answered. READ MORE

  6. 5. Atmospheric mercury deposition in alpine snow, northern British Columbia and southwestern Yukon, Canada

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Pia Karlsson; [2014]
    Keywords : ;

    Abstract : High mercury (Hg) levels have been measured in fish in Kusawa Lake (KL), a subalpine, partly glacier-fed lake situated in the southwestern Yukon, Canada, but it is presently unknown where this Hg comes from. One possible source may be atmospheric deposition of Hg in snow and subsequent release by melt into the lake. READ MORE