Oil from transgenic Camelina sativa containing over 25 % n-3 long-chain PUFA as the major lipid source in feed for Atlantic salmon (Salmo salar)

A - Papers appearing in refereed journals

Betancor, M. B., Li, K., Bucerzan, V. S., Sprague, M., Sayanova, O. V., Usher, S. L., Han, L., Norambuena, F., Torrissen, O., Napier, J. A., Tocher, D. R. and Olsen, R. E. 2018. Oil from transgenic Camelina sativa containing over 25 % n-3 long-chain PUFA as the major lipid source in feed for Atlantic salmon (Salmo salar). British Journal Of Nutrition. 119 (12), pp. 1378-1392.

AuthorsBetancor, M. B., Li, K., Bucerzan, V. S., Sprague, M., Sayanova, O. V., Usher, S. L., Han, L., Norambuena, F., Torrissen, O., Napier, J. A., Tocher, D. R. and Olsen, R. E.
Abstract

Facing a bottleneck in the growth of aquaculture, and a gap in the supply and demand of the highly beneficial n-3 long-chain PUFA (LC-PUFA), sustainable alternatives to traditional marine-based feeds are required. Therefore, in the present trial, a novel oil obtained from a genetically engineered oilseed crop, Camelina sativa, that supplied over 25 % n-3 LC-PUFA was tested as a sole dietary-added lipid source in Atlantic salmon (Salmo salar) feed. Three groups of fish were fed three experimental diets for 12 weeks with the same basal composition and containing 20 % added oil supplied by either a blend of fish oil and rapeseed oil (1:3) (COM) reflecting current commercial formulations, wild-type Camelina oil (WCO) or the novel transgenic Camelina oil (TCO). There were no negative effects on the growth, survival rate or health of the fish. The whole fish and flesh n-3 LC-PUFA levels were highest in fish fed TCO, with levels more than 2-fold higher compared with those of fish fed the COM and WCO diets, respectively. Diet TCO had no negative impacts on the evaluated immune and physiological parameters of head kidney monocytes. The transcriptomic responses of liver and mid-intestine showed only mild effects on metabolism genes. Overall, the results clearly indicated that the oil from transgenic Camelina was highly efficient in supplying n-3 LC-PUFA providing levels double that obtained with a current commercial standard, and similar to those a decade ago before substantial dietary fishmeal and oil replacement.

KeywordsEPA; DHA; Camelina; Aquaculture; Fish oil
Year of Publication2018
JournalBritish Journal Of Nutrition
Journal citation119 (12), pp. 1378-1392
Digital Object Identifier (DOI)doi:10.1017/S0007114518001125
Open accessPublished as green open access
Funder project or codes5462
FunderBiotechnology and Biological Sciences Research Council
Accepted author manuscript
Output statusPublished
Publication dates
Online30 May 2018
Publication process dates
Accepted01 Apr 2018
PublisherCambridge University Press (CUP)
Copyright licenseCC BY
ISSN0007-1145

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