Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/23418
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Modulation of selenium tissue distribution and selenoproteins expression in Atlantic salmon (Salmo salar L.) fed diets with graded levels of plant ingredients
Authors: Betancor, Monica
Dam, Thi M C
Walton, Jamie
Morken, Thea
Campbell, Patrick
Tocher, Douglas R
Contact Email: m.b.betancor@stir.ac.uk
Keywords: Selenium
Atlantic salmon
human selenium intake
selenoprotein
gene expression
Issue Date: Apr-2016
Publisher: Cambridge University Press
Citation: Betancor M, Dam TMC, Walton J, Morken T, Campbell P & Tocher DR (2016) Modulation of selenium tissue distribution and selenoproteins expression in Atlantic salmon (Salmo salar L.) fed diets with graded levels of plant ingredients, British Journal of Nutrition, 115 (8), pp. 1325-1338.
Abstract: Increased substitution of marine ingredients by terrestrial plant products in aquafeeds has proved to be suitable for Atlantic salmon farming. However, a reduction in omega-3 long-chain polyunsaturated fatty acids is a consequence of this substitution. In contrast, relatively little attention has been paid to the effects of fish meal and oil substitution on levels of micronutrients such as selenium (Se), considering fish are major sources of this mineral for human consumers. To evaluate the effects of dietary marine ingredient substitution on tissue Se distribution and the expression of Se metabolism and antioxidant enzymes genes, Atlantic salmon were fed three feeds based on commercial formulations with increasing levels of plant proteins (PP) and vegetable oil. Lipid content did not vary at any sampling point in flesh, whereas was higher in fish fed higher PP in liver of 1 kg fish. Fatty acid content reflected dietary input and was related to oxidation levels. Liver had the highest Se levels, followed by head kidney whereas the lowest contents were found in brain and gill. The Se concentration of flesh decreased considerably with high levels of substitution, reducing the added value of fish consumption. Only brain showed significant differences in glutathione peroxidase, tRNA selenocysteine associated protein 1 and superoxide dismutase expression, whereas no significant regulation of Se related genes was found in liver. Although Se levels in the diets satisfied essential requirements of salmon, high PP levels led to a reduction in the supply of this essential micronutrient.
Type: Journal Article
URI: http://hdl.handle.net/1893/23418
DOI Link: http://dx.doi.org/10.1017/S0007114516000416
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Publisher policy allows this work to be made available in this repository. Published in British Journal of Nutrition / Volume 115 / Issue 08 / April 2016, pp 1325-1338 Copyright © The Authors 2016 by Cambridge University Press. The original publication is available at: http://dx.doi.org/10.1017/S0007114516000416
Affiliation: Aquaculture
University of Stirling
BioMar Ltd
BioMar AS
BioMar U.K.
Aquaculture

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