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Hållbar röding?: Odlad rödings miljöpåverkan ur ett lokalt och globalt perspektiv
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2015 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Sustainable Char? The environmental impact from cultivated char on a local and global level

Aquaculture in Sweden has increased since the 1980s and cultivated char (Salvelinus sp.) has followed this trend. The purpose of this study is to investigate the environmental impact of farmed char on a local and global level with focus on the feed, and then compare it to the environmental impact from pig production. The feed for char was examined by sending out a number of questions to fish farmers about their fish farming with a focus on food and the environment. From the results, it was found that nearly half of the ingredients were animal feed and almost a sixth of the content were soy products. The feed conversion ratio (FCRvalue) of cultivated charr was found to be 1,1 and in Swedish pigs the FCRvalue was 3. Although char has a lower FCRvalue the soy needed for 1000kg charr contribute to 660 square meters of soy plantation often situated in harvested rainforests in South America. With this study, I have shown that cultivation of char, as it is done today, contribute to a particular risk to the global environment as well being a potential threat to the local aquatic environment in the event of problems with the cultivation, such as diseases or that fish escapes from farms and affect other species in the lakes. Despite the risk, there are many positive aspects of cultivation of char, but there are also many opportunities for improvement for the cultivation that further can contribute to a reduced environmental impact both locally and globally.

Place, publisher, year, edition, pages
2015. , 20 p.
Keyword [sv]
National Category
Natural Sciences
URN: urn:nbn:se:umu:diva-106364OAI: diva2:841570
Educational program
University Programme in Nature Guiding
Available from: 2015-10-26 Created: 2015-07-13 Last updated: 2015-10-26Bibliographically approved

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