Sökning: "Daphnia pulex"
Hittade 2 uppsatser innehållade orden Daphnia pulex.
1. Effekten av vägsalt på djurplankton : - ett sötvattensexperiment i oligotrofa och eutroa vatten
Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Pollution or changes in abiotic factors can be stressful if they exceed a species tolerance level, it can for example prevent the species ability to reproduce and disperse. High nutrition- and salt levels may be limiting for species in higher concentrations and affects all species since indirect, interactive and additive effects of high nutrient or salt levels lead to changes in the community structures. LÄS MER
2. Predatorinducerad fekunditet hos Daphnia pulex vid simulerade årstidsbundna temperaturvariationer
Magister-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Female growth, number of eggs and egg growth of Daphnia pulex were studied at four temperatures, 12, 16, 18 and 20°C. I hypothesized that female growth and number of eggs would be lower and the size of the eggs larger in the presence of a predator (kairomones) than in its absence. This effect was expected to be more evident at lower temperatures. LÄS MER
