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Comparison of cholestane and yttrium oxide as digestibility markers for lipid components in Atlantic salmon (Salmo salar L.) diets

Citation

Carter, CG and Lewis, TE and Nichols, PD, Comparison of cholestane and yttrium oxide as digestibility markers for lipid components in Atlantic salmon (Salmo salar L.) diets, Aquaculture, 225, (1-4) pp. 341-351. ISSN 0044-8486 (2003) [Refereed Article]

DOI: doi:10.1016/S0044-8486(03)00300-4

Abstract

The study aimed to test the similarity between apparent digestibility coefficients (ADC) calculated using either yttrium oxide or cholestane. Atlantic salmon were fed three diets containing a different mix of oil sources: diets contained only canola oil (CO), canola oil and fish oil (CFO), or canola oil and thraustochytrid meal (CTH) (a marine microorganism with potential as an alternative oil source). Both markers were concentrated by the same amount in the faeces compared to the diets. ADC values using cholestane tended to be higher than yttrium, and there was a significant marker effect for crude protein, energy, total lipid and triacylglycerol. Although statistically significant the marker effect was due to numerically small differences in ADC values and probably of limited biological significance. ADC values for the majority of fatty acids did not show marker effects. Consequently, it was concluded that the broad similarity in the digestibility of lipid components between markers validated the use of cholestane for calculating lipid digestibility in Atlantic salmon. © 2003 Elsevier Science B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
Author:Carter, CG (Professor Chris Carter)
Author:Lewis, TE (Dr Thomas Lewis)
ID Code:26716
Year Published:2003
Web of Science® Times Cited:16
Deposited By:TAFI - Aquaculture
Deposited On:2003-08-01
Last Modified:2011-09-20
Downloads:0

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