Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/34800
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Oils Derived from GM Crops as Sustainable Solutions to the Supply of Long-Chain Omega-3 for On-Growing Atlantic Bluefin Tuna (Thunnus thynnus L.)
Author(s): Betancor, Mónica B
Sprague, Matthew
González-Silvera, Daniel
Ortega, Aurelio
de la Gándara, Fernando
Gong, Xu
Napier, Johnathan A
Tocher, Douglas R
Mourente, Gabriel
Contact Email: m.b.betancor@stir.ac.uk
Keywords: Atlantic bluefin tuna
GM Camelina
dietary oils
sustainable feeds
hepatic lipid metabolism
Issue Date: Dec-2022
Date Deposited: 1-Dec-2022
Citation: Betancor MB, Sprague M, González-Silvera D, Ortega A, de la Gándara F, Gong X, Napier JA, Tocher DR & Mourente G (2022) Oils Derived from GM Crops as Sustainable Solutions to the Supply of Long-Chain Omega-3 for On-Growing Atlantic Bluefin Tuna (Thunnus thynnus L.). <i>Fishes</i>, 7 (6), Art. No.: 366. https://doi.org/10.3390/fishes7060366
Abstract: Recently Camelina sativa, has been genetically modified to produce oils rich in omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), EPA (eicosapentaenoic acid) and EPA + DHA (docosahexaenoic acid). The aim of this study was to test the feasibility of using these novel sources of de novo EPA and EPA + DHA as substitutes for marine oil in feeds for juvenile Atlantic Bluefin tuna (ABT). The results showed the oils were practical sources of n-3 LC-PUFA which could potentially replace fish oil (FO) in feeds for ABT juveniles. Fish fed the test diets (ECO, EPA alone and DCO, EPA + DHA) displayed good growth performance, survival and feed utilisation approaching that of ABT fed the reference diet (MGK) containing marine fish oil with the rank order being MGK > DCO > ECO. The test diets showed positive effects, upregulating the expression of genes of major nuclear receptors and those of lipid metabolism including digestion, LC-PUFA synthesis and antioxidant pathways. The results indicated that the DCO feed containing both DHA and EPA performed better than the ECO feed with much lower DHA. However, feeds formulated with both these oils may still require supplementary DHA to satisfy the high requirement of ABT for this essential nutrient.
DOI Link: 10.3390/fishes7060366
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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