Estimating changes in essential amino acid requirements of rainbow trout and Atlantic salmon as a function of body weight or diet composition using a novel factorial requirement model

Hua, Katheline, and Bureau, Dominique (2019) Estimating changes in essential amino acid requirements of rainbow trout and Atlantic salmon as a function of body weight or diet composition using a novel factorial requirement model. Aquaculture, 513. 733440.

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Abstract

As fish feeds are increasingly being formulated with a variety of protein sources, more attention needs to be paidto ensure that the essential amino acids (EAAs) requirements of the fish are met adequately. A novel factorial AArequirement model was developed by incorporating the effects of dietary and biological factors on AA re-quirement and utilization for two salmonid fish species, Atlantic salmon and rainbow trout. The factorial modeldetermines AA requirement of fish based on species, expected body weight gain, body protein deposition, AAprofile in body protein deposition, maintenance AA requirement, and inevitable AA metabolism. Simulationsusing this novel model suggest that EAA requirement (expressed as % diet dry matter DM) progressively de-creases when the live weight of the fish increases. Atlantic salmon appears to have higher EAA requirements(estimated as % diet DM) than rainbow trout at the same body weight classes, and the rate of decrease in EAArequirement with the increase of body weight appears to be slower in Atlantic salmon. Model simulations alsosuggest that diet composition influences the estimates of EAA requirements. The novel factorial model could be ahelpful tool in formulating cost-effective aquaculture feeds. This modelling approach can be adapted to otherfish species

Item ID: 60490
Item Type: Article (Research - C1)
ISSN: 1873-5622
Keywords: amino acids; requirement; factorial model; maintenance; marginal utilization efficiency
Copyright Information: © 2019 Elsevier B.V. All rights reserved.
Date Deposited: 15 Nov 2019 04:17
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 100%
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