|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Dietary phosphorous and protein supplementation enhances seawater growth and reduces severity of vertebral malformation in triploid Atlantic salmon (Salmo salar L.)|
Clokie, Benjamin G J
|Citation:||Smedley M, Clokie BGJ, Migaud H, Campbell P, Walton J, Hunter D, Corrigan D & Taylor J (2016) Dietary phosphorous and protein supplementation enhances seawater growth and reduces severity of vertebral malformation in triploid Atlantic salmon (Salmo salar L.), Aquaculture, 451, pp. 357-368.|
|Abstract:||Diploid (2N) and triploid (3N) sibling post-smolts were divided between six sea pens and fed: a standard commercial nutrient package diet (2×2N SP, 2×3N SP), or an iso-energetic nutrient boosted (higher dietary protein and phosphorous) package (2×3N BP) until market size. 3N groups initially grew significantly faster than 2N, and by harvest, 3N BP weighed significantly more (3210±87g) than 2N SP or 3N SP (3007±64g; 2965±88g), while there was no significant difference in weight between ploidy in SP diet. Higher visible vertebral (9.6±0.4%) and jaw deformities (10.6±1.2%) were observed in 3N compared to 2N (0.9±0.1%; 1.3±0.5%). However, x-ray radiography revealed that 3N BP and 2N SP had comparable levels of severely affected individuals at time of sea transfer, while 3N SP showed a 3 fold increase in the severity of malformed individuals. The tail region (R3) in 3N SP fish had both the lowest vertebral strength and stiffness and the highest number of deformed vertebrae. Fillet quality attributes were comparable between diet and ploidy. These findings show that triploid growth rate can be sustained until harvest throughout the seawater phase, and more importantly the progression of spinal deformity beyond that at sea transfer can be stabilised by increasing dietary P during the marine phase.|
|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: Smedley MA, Clokie BGJ, Migaud H, Campbell P, Walton J, Hunter D, Corrigan D & Taylor J (2016) Dietary phosphorous and protein supplementation enhances seawater growth and reduces severity of vertebral malformation in triploid Atlantic salmon (Salmo salar L.),Aquaculture, 451, pp. 357-368. DOI: 10.1016/j.aquaculture.2015.10.001 © 2015, Elsevier. Licensed under the Creative Commons Attribution- NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/|
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