Early nutritional intervention can improve utilisation of vegetable-based diets in diploid and triploid Atlantic salmon (Salmo salar L.)

• Published in: British Journal of Nutrition
• Main Authors: Clarkson, Michael, Migaud, Herve, Metochis, Christoforos, Vera, LM, Leeming, Daniel, Tocher, Douglas R, Taylor, John
• Other Authors: Biotechnology and Biological Sciences Research Council, Biomar Ltd, Marine Harvest (Scotland) Ltd, European Commission, University of Stirling, Institute of Aquaculture, BioMar Ltd, orcid:0000-0002-5404-7512, orcid:0000-0002-3299-0630, orcid:0000-0003-0999-055X, orcid:0000-0002-8603-9410, orcid:0000-0003-4370-7922
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press 2017
• Subjects: Atlantic salmon: Nutritional programming: Lipids: EPA: DHA: Vegetable raw material; Atlantic salmon; Salmo salar
• Online Access: http://hdl.handle.net/1893/25669; https://doi.org/10.1017/S0007114517001842; http://dspace.stir.ac.uk/bitstream/1893/25669/1/early_nutritional_intervention_can_improve_utilisation_of_vegetablebased_diets_in_diploid_and_triploid_atlantic_salmon_salmo_salar_l.pdf

The present study investigated nutritional programming in Atlantic salmon to improve utilisation of a vegetable-based diet. At first exogenous feeding, fry were fed either a marine-based diet (Diet Mstimulus, 80% fishmeal (FM)/4% fish oil (FO)) or a vegetable-based diet (Diet Vstimulus, 10% FM/0% FO) for 3 weeks. Subsequently, all fish were then fed under the same conditions with a commercial, marine-based, diet for 15 weeks and thereafter challenged with a second V diet (Diet Vchallenge, 10% FM/0% FO) for 6 weeks. Diploid and triploid siblings were run in parallel to examine ploidy effects. Growth performance, feed intake, nutrient utilisation and intestinal morphology were monitored. Fish initially given Diet Vstimulus (V-fish) showed 24 % higher growth rate and 23 % better feed efficiency compared with M-fish when later challenged with Diet Vchallenge. There was no difference in feed intake between nutritional histories, but increased nutrient retentions highlighted the improved utilisation of a V diet in V-fish. There were generally few significant effects of nutritional history or ploidy on enteritis scores in the distal intestine after the challenge phase as only V-triploids showed a significant increase (P