Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/28401
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: The impact of dietary protein: lipid ratio on growth performance, fatty acid metabolism, product quality and waste output in Atlantic salmon (Salmo salar)
Author(s): Mock, Thomas S
Francis, David S
Jago, Matthew K
Glencross, Brett D
Smullen, Richard P
Keast, Russell S J
Turchini, Giovanni M
Contact Email: b.d.glencross@stir.ac.uk
Keywords: Protein
Lipid
Environment
Atlantic salmon
Aquafeed
Issue Date: 25-Feb-2019
Citation: Mock TS, Francis DS, Jago MK, Glencross BD, Smullen RP, Keast RSJ & Turchini GM (2019) The impact of dietary protein: lipid ratio on growth performance, fatty acid metabolism, product quality and waste output in Atlantic salmon (Salmo salar). Aquaculture, 501, pp. 191-201. https://doi.org/10.1016/j.aquaculture.2018.11.012
Abstract: A common strategy for aquafeed manufacturers has been the utilisation of relatively large amounts of terrestrial, both animal and plant, oil sources to produce diets with a high energy content. The provision of high fat diets is aimed at promoting the utilisation of energy from lipid, thus increasing the amount of dietary protein used for tissue synthesis. However, in recent years the cost of marine sourced dietary lipids has risen, at the same time, farming operations are under increasing pressure to limit environmental degradation associated with nitrogenous waste effluent. Currently there is limited information available regarding the environmental and economic impacts of an altered dietary protein: lipid ratio in diets for large Atlantic salmon (Salmo salar) reared in seawater, presenting a potential impediment for nutritional based solutions. Accordingly the present study compared two isoenergetic diets with varied protein: lipid ratios via an assessment of growth, fatty acid utilisation, human nutritional quality, nitrogenous waste output and economic considerations. The trial diets were fed to the fish for the final 150 days of an on-farm grow-out period and resulted in minimal differences in fish growth, fatty acid utilisation and fillet quality. A decreased dietary protein: lipid ratio resulted in a more efficient protein utilisation both in terms of digestibility and assimilation into fish and, therefore, nitrogenous waste output was reduced. However, due to small differences in feed utilisation, the cost of fish production was numerically higher.
DOI Link: 10.1016/j.aquaculture.2018.11.012
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. Accepted refereed manuscript of: Mock TS, Francis DS, Jago MK, Glencross BD, Smullen RP, Keast RSJ & Turchini GM (2019) The impact of dietary protein: lipid ratio on growth performance, fatty acid metabolism, product quality and waste output in Atlantic salmon (Salmo salar). Aquaculture, 501, pp. 191-201. DOI: https://doi.org/10.1016/j.aquaculture.2018.11.012 © 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

Files in This Item:
File Description SizeFormat 
Mock_Pro_Lip_ratios-AAM.pdfFulltext - Accepted Version732.04 kBAdobe PDFView/Open



This item is protected by original copyright



A file in this item is licensed under a Creative Commons License Creative Commons

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.