Sökning: "pelagic food web"

Hittade 2 uppsatser innehållade orden pelagic food web.

1. 1. The effect of visibility and predators on foraging efficiency in littoral and pelagic perch

   Master-uppsats, Uppsala universitet/Limnologi

   Författare :Konrad Karlsson; [2012]
   Nyckelord :Resource polymorphism; Perca fluviatilis; phenotypic plasticity; habitat coupling; prey preference;

   Sammanfattning : Phenotypic plasticity in Eurasian perch (Perca fluviatilis) can be driven by a trade-off for ecological specialisation to littoral and pelagic resources. Previous studies on perch have found that this specialisation can have different effects on linkage between the littoral and pelagic food web depending on water transparency. LÄS MER

3. 2. Effects of food quantity, dietary fatty acids and temperature on fitness of Daphnia magna : a factorial experiment with Scenedesmus acutus and EPA amendments

   Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

   Författare :Bernadette Pree; [2011]
   Nyckelord :Daphnia magna; temperature; Scenedesmus acutus; food quality; dietary fatty acid amendment; food concentration; pelagic food web;

   Sammanfattning : The performance of zooplankton has a major impact on the efficiency in trophic transfer in pelagic food webs and is therefore examined in this study. I investigated the effect of different food quantity and food quality, as measured by omega-3 fatty acid (ω3-FA) content on survival, somatic growth and reproduction of Daphnia magna at high and low temperatures in laboratory growth experiments. LÄS MER