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Sustainable farming of Arctic charr (Salvelinus alpinus)

Carlberg, Hanna (2016). Sustainable farming of Arctic charr (Salvelinus alpinus). Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2016:82
ISBN 978-91-576-8666-4
eISBN 978-91-576-8667-1
[Doctoral thesis]

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Abstract

Arctic charr (Salvelinus alpinus L.) is a salmonid that is well adapted to cold waters and is commonly farmed in open net cages. A breeding program has enabled a relatively large production in Sweden, providing a continuous supply of fresh fish to the market. Despite expansions and improvements of the Arctic charr farming industry during the last decade, there are still sustainability challenges to overcome.

This doctoral thesis explores various methods for improving the sustainability of Arctic charr farming, such as alternative protein sources in the feed, a shortened production cycle through selective breeding and an adaptive feeding management model.

A new feed composition, containing a protein mixture with ingredients that are not attractive for human consumption, was evaluated for Arctic charr. The feed consisted of Baltic Sea decontaminated fishmeal (Sprattus sprattus and Clupea harengus), Baltic Sea blue mussel meal (Mytilus edulis) and baker’s yeast (Saccharomyces cerevisiae). The new feed resulted in lower growth compared with fish fed a commercial-type control feed, likely due to a reduced digestibility caused by the baker’s yeast. However, a self-selection study revealed a preference for the new feed over the control feed. Additionally, consumers could not distinguish between fish that had been fed the new feed or the control feed. Possible family effects that the new feed may have on growth were also investigated, showing that selection for high growth on a commercial-type feed would also benefit a higher growth capacity on the new feed.

Selective breeding of Arctic charr had clear positive effects on growth. After adjusting for changes of environmental factors within the hatchery, the growth improvement from the first generation to the current seventh generation was 11 % per generation and production time has been shortened by ten months. Selective breeding also affected seasonal growth patterns and Arctic charr from the seventh generation grew more during winter than previously, although the largest weight improvement between generations occurred during summer. A new growth capacity, and pattern, demands an adaptive feeding management model so that feed waste and environmental impacts can be minimized. A new model on the digestible energy need of Arctic charr and a seasonal growth capacity factor were developed and can together be used to calculate the daily feed allowance during different periods of the growth season.

Authors/Creators:Carlberg, Hanna
Title:Sustainable farming of Arctic charr (Salvelinus alpinus)
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2016
Depositing date:31 August 2016
Volume:2016:82
Number of Pages:53
Papers/manuscripts:
NumberReferences
ICarlberg, H., Cheng, K., Lundh, T., Brännäs, E. (2015). Using self-selection to evaluate the acceptance of a new diet formulation by farmed fish. Appl Anim Behav Sci. 171, 226-232.
IICarlberg, H., Lundh, T., Cheng, K., Pickova, J., Langton, M., Varzquez Gutierrez, J., Kiessling, A., Brännäs, E. In search for protein sources: evaluating an alternative to the traditional fish feed for Arctic charr (Salvelinus alpinus L.). (Submitted manuscript).
IIICarlberg, H., Alanärä, A., Brännäs, E. Evaluation of family effects on growth performance of Arctic charr (Salvelinus alpinus L.) fed an alternative feed. (Manuscript).
IVCarlberg, H., Nilsson, J., Brännäs E., Alanärä, A. An evaluation of 30 years of selective breeding in Arctic charr (Salvelinus alpinus L.) and its implications for feeding management. (Manuscript).
Place of Publication:Umeå
Publisher:Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8666-4
ISBN for electronic version:978-91-576-8667-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L02 Animal feeding
L Animal production > L51 Animal physiology - Nutrition
M Aquatic sciences and fisheries > M12 Aquaculture production
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Agrovoc terms:salvelinus alpinus, chars, fish culture, fish feeding, breeding, feed composition, sprattus sprattus, clupea harengus, mytilus edulis, sustainability, sweden
Keywords:aquaculture, sustainability, Arctic charr, Salvelinus alpinus, Saccharomyces cerevicae, breeding, feeding management
URN:NBN:urn:nbn:se:slu:epsilon-e-3636
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3636
ID Code:13615
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
External funders:FORMAS
Deposited By: Hanna Carlberg
Deposited On:31 Aug 2016 09:24
Metadata Last Modified:05 Sep 2016 07:17

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