Sökning: "Northern pike"
Visar resultat 1 - 5 av 23 uppsatser innehållade orden Northern pike.
1. Brunifiering av akvatiska ekosystem: En experimentell studie som undersöker tröskelvärde för predator- och bytesförhållande vid en gradient från klart till brunt vatten
Kandidat-uppsats, Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)Sammanfattning : Browning of water has increased over the last couple of decades on the northern hemisphere. Research show that possible drivers for this change are land use change, climate change, increased precipitation and increased temperatures. LÄS MER
2. Gäddans val av lekvikar : Vilka faktorer bestämmer tätheterna av vuxna gäddor i Bottenhavets vikar?
Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : Northern pike (Esox lucius L) populations have been declining along the east coast of Sweden, including the Gävleborg coast. This negative trend is believed to be caused by factors related to pike recruitment including loss of suitable spawning habitats. LÄS MER
3. Human Exposure to Per- and Polyfluoroalkyl : Substances through Fish Consumption
Master-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknikSammanfattning : Human exposure to per- and poly-fluoroalkyl substances (PFAS) occurs mainly through two pathways, inhalation and ingestion. Dietary exposure to persistent organic pollutants (POPs), including PFAS, is driven mainly by the consumption of foods of marine or terrestrial animal origin. LÄS MER
4. Assortativ parning hos sik (Coregonus lavaretus)
Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : European whitefish (Coregonus lavaretus) forms reproductively isolated sub-populations with different body sizes in the lakes where northern pike (Esox lucius) exists. It has been hypothesized that the initial reproductive isolation between ecotypes arises through size-assortative mate choice or because small and large individuals arrive to the spawning grounds at different times. LÄS MER
5. Evaluation of filter and extraction kits for eDNA-based quantification of Northern pike density
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Multi-mesh gillnets are the most common gear in Swedish fish monitoring programs. The method works for many fish species but has limitations. LÄS MER