Sökning: "fish biomass"
Visar resultat 1 - 5 av 58 uppsatser innehållade orden fish biomass.
1. The effects of fishing on stability of a food web under climate warming
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Predicting the effects of fishing in a warmer environment caused by climate change requires knowledge of what trophic level is fished on, the physiological effects of temperature on fish, and how these two affect ecological interactions. Both temperature and fishing are known to affect the stability of food webs in several ways. LÄS MER
2. Ecological impacts of dam removal in Swedish inland waters : Effects on water chemistry and fish demography
Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Dams play an important role in our society, but their negative impacts on aquatic ecosystems have led to a need for conservation efforts to mitigate the negative effects. In some instances, dam removal has been suggested to be the most economically and ecologically beneficial restoration method to improve longitudinal connectivity. LÄS MER
3. Change in uptake and transfer of zinc in the food chain when predatory fish disappear from the system
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : There is a widespread distribution of possibly toxic heavy metals, such as zinc, in aquatic ecosystems. Simultaneously aquatic food webs are changing due to declining predatory fish stocks. LÄS MER
4. Cultivation of Yarrowia lipolytica on a hydrolysate based on food waste
Master-uppsats, SLU/Department of Molecular SciencesSammanfattning : Interest in replacing fish oil and fish meal as fish feed ingredients with more socially, environmen-tally, and economically sustainable alternatives has increased in recent years. One such alternative could be the use of yeast biomass. LÄS MER
5. Evaluation of restoration efforts in Dalälven - conditions for survival rate of Salmo trutta and Salmo salar
Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : Rivers are among the most anthropogenically affected ecosystems in the world by irrigation, transportation, channelizing, and hydropower. Habitat restorations have become a popular method to restore the heterogeneity and complexity of rivers aiming for improvement of biodiversity. LÄS MER