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An oil containing EPA and DHA from transgenic Camelina sativa to replace marine fish oil in feeds for Atlantic salmon (Salmo salar L.): Effects on intestinal transcriptome, histology, tissue fatty acid profiles and plasma biochemistry

Citation
Betancor M, Li K, Sprague M, Bardal T, Sayanova O, Usher S, Han L, Masoval K, Torrissen O, Napier JA, Tocher DR & Olsen RE (2017) An oil containing EPA and DHA from transgenic Camelina sativa to replace marine fish oil in feeds for Atlantic salmon (Salmo salar L.): Effects on intestinal transcriptome, histology, tissue fatty acid profiles and plasma biochemistry, PLoS ONE, 12 (4), Art. No.: e0175415.

Abstract
New de novo sources of omega 3 (n-3) long chain polyunsaturated fatty acids (LC-PUFA) are required as alternatives to fish oil in aquafeeds in order to maintain adequate levels of the beneficial fatty acids, eicosapentaenoic and docosahexaenoic (EPA and DHA, respectively). The present study investigated the use of an EPA+DHA oil derived from transgenic Camelina sativa in Atlantic salmon (Salmo salar) feeds containing low levels of fishmeal (35 %) and fish oil (10 %), reflecting current commercial formulations, to determine the impacts on tissue fatty acid profile, intestinal transcriptome, and health of farmed salmon. Post-smolt Atlantic salmon were fed for 12-weeks with one of three experimental diets containing either a blend of fish oil/rapeseed oil (FO), wild-type camelina oil (WCO) or transgenic camelina oil (DCO) as added lipid source. The DCO diet did not affect any of the fish performance or health parameters studied. Analyses of the mid and hindgut transcriptomes showed only mild effects on metabolism. Flesh of fish fed the DCO diet accumulated almost double the amount of n-3 LC-PUFA than fish fed the FO or WCO diets, indicating that these oils from transgenic oilseeds offer the opportunity to increase the n-3 LC-PUFA in farmed fish to levels comparable to those found a decade ago.

StatusPublished
AuthorsBetancor Monica, Li Keshuai, Sprague Matthew, Bardal Tora, Sayanova Olga, Usher Sarah, Han Lihua, Masoval Kjell, Torrissen Ole, Napier Johnathan A, Tocher Douglas R, Olsen Rolf Erik
Publication date12/04/2017
Publication date online12/01/2017
Date accepted by journal24/03/2017
PublisherPublic Library of Science
ISSN 1932-6203
LanguageEnglish

Journal
Plos one: Volume 12, Issue 4

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