Domestic feed sources to farmed Arctic Charr (Salvelinus alpinus) : an investigation of nutritional implications and impact on the ecological footprint

Sammanfattning: This study presents an overview of recapturing nutrients from Baltic Sea thru mussel farmingand producing mussel meal, detoxification of polluted fish into purified high quality fish mealand oil and introducing microorganisms as waste consumers as well as good protein sourcesfor fish diets. Work on this study is focused on comparing growth performance of test diet,which has been made strictly of domestic (Baltic Sea) protein sources to commercial diet.Also, the study backs up the idea that use/reuse of protein sources and nutrients, i.e. makingdiets of sources from Baltic Sea and use them in aquaculture makes positive impact onecological footprint, restores balance in aquatic ecosystem and flow of nutrients that cancompete with present commercial diets in growth performance and price. Study is based onpractical experiment, literature investigation and personal communication with peopleinvolved in this issue. Experiment is based on comparing growth performance of fish fedcommercial (control) feed and test (experimental) feed.The thesis intends to show that recapture of nutrients is a way to establish a nutrition positiveand environmental sustainable aquaculture in the Baltic Sea.