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Feeding regime does not influence lysine utilisation by Atlantic salmon, Salmo salar L., parr

Citation

Hauler, RC and Carter, CG and Edwards, SJ, Feeding regime does not influence lysine utilisation by Atlantic salmon, Salmo salar L., parr, Aquaculture, 273, (4) pp. 545-555. ISSN 0044-8486 (2007) [Refereed Article]

DOI: doi:10.1016/j.aquaculture.2007.10.045

Abstract

This study investigated whether the efficiency of lysine utilisation for liveweight gain, protein gain and lysine gain was affected by feeding regime in Atlantic salmon (Salmo salar L.) parr. Twelve diets containing from 10.15 to 20.79 g dietary digestible lysine kg- 1 were hand-fed either to satiation or to a controlled fixed ration. The controlled ration was set to equal the feed intake of the basal (lowest) lysine diet so that any growth above that of the group fed the basal diet at the controlled ration was due entirely to the additional dietary lysine. For both feeding regimes, with increasing dietary lysine there were significant linear increases in liveweight gain (P < 0.001) and in protein (P < 0.001) and lysine (P < 0.01) concentration of liveweight gain. Increasing dietary lysine resulted in a significant (P < 0.001) linear increase in feed intake at satiation. Efficiency of lysine utilisation for liveweight gain above maintenance lysine intake was significantly (P < 0.005) higher at satiation than for the controlled ration: 47.7 compared to 34.9 mg liveweight gain per mg digestible lysine intake, respectively. However, feeding regime had no significant effect on the efficiency of lysine utilisation for protein or lysine gain. This study demonstrated that feed intake does not influence the efficiency of lysine utilisation for protein or lysine gain in Atlantic salmon parr. The change in weight-specific lysine composition suggests a robust physiological mechanism maintaining the efficiency of lysine utilisation for lysine gain in Atlantic salmon parr. © 2007.

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:Hauler, RC (Mr Rhys Hauler)
Author:Carter, CG (Professor Chris Carter)
Author:Edwards, SJ (Dr Steve Edwards)
ID Code:50269
Year Published:2007
Web of Science® Times Cited:16
Deposited By:TAFI - Aquaculture
Deposited On:2007-08-01
Last Modified:2008-04-12
Downloads:0

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