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Low fishmeal diets for Atlantic Salmon, Salmo salar L.,using soy protein concentrate treated with graded levels of phytase
Citation
Carter, CG and Sajjadi, M, Low fishmeal diets for Atlantic Salmon, Salmo salar L.,using soy protein concentrate treated with graded levels of phytase, Aquaculture International, 19, (3) pp. 431-444. ISSN 0967-6120 (2011) [Refereed Article]
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The final publication is available at http://www.springerlink.com
DOI: doi:10.1007/s10499-010-9358-z
Abstract
The experiment aimed at determining the efficient use of phytase (Phy) in
Atlantic salmon diets that had low (4.5%) fishmeal and contained 60% soy protein concentrate
(SPC). Phytase was either included at 250, 500, 1,000 or 4,000 U Phy kg-1 diet or
the SPC was pre-treated prior to making diets using 250, 500 or 1,000 U Phy kg-1 SPC. Fish
were fed the experimental diets for 12 weeks, and there were no differences in survival
among treatments nor were there differences in growth performance between the phytasepre-
treated SPC diets. Feed intake and weight gain were significantly lower for diets supplemented
below 1,000 U Phy kg-1 compared to all other diets. Apparent digestibility (AD)
of phosphorus was significantly lower without the use of phytase (45.43 ± 2.06%) than for
all other treatments. AD phosphorus increased from 55.70 ± 1.81% at the lowest phytase
supplementation (250 U Phy kg-1) to 80.87 ± 2.12% at the highest (4,000 U Phy kg-1).
There was no difference in AD phosphorus between the diet with the highest supplementation
(4,000 UPhy kg-1) and the pre-treated diets. There were no differences in whole-body
dry material, crude protein or total lipid, whereas bone ash was significantly lower for diets
supplemented below 1,000 U Phy kg-1. Ash and phosphorus in the whole body and bone
increased with increasing added phytase. At and above an inclusion of 1,000 U Phy kg-1,
bone ash (51.26 ± 0.12% bone weight) and bone phosphorus (11.21 ± 0.04% bone weight)
reached concentrations that were no different to the pre-treated diets. In conclusion, phytase
improved Atlantic salmon’s growth performance fed low fishmeal diets containing SPC, and
at least 1,000 U Phy kg-1 diet was required to have the same effect as pre-treatment of SPC
with 250 U Phy kg-1 SPC.
Item Details
Item Type: | Refereed Article |
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Keywords: | Feed enzyme Fishmeal replacement Phytase Salmonid Soybean Supplementary dietary enzyme |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture |
Objective Division: | Animal Production and Animal Primary Products |
Objective Group: | Fisheries - aquaculture |
Objective Field: | Aquaculture crustaceans (excl. rock lobster and prawns) |
UTAS Author: | Carter, CG (Professor Chris Carter) |
ID Code: | 71709 |
Year Published: | 2011 |
Web of Science® Times Cited: | 24 |
Deposited By: | Sustainable Marine Research Collaboration |
Deposited On: | 2011-08-02 |
Last Modified: | 2012-04-05 |
Downloads: | 1 View Download Statistics |
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