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Reevaluation of the Quantitative Dietary Lysine Requirements of Fish

Citation

Hauler, RC and Carter, CG, Reevaluation of the Quantitative Dietary Lysine Requirements of Fish, Reviews in Fisheries Science, 9, (3) pp. 133-163. ISSN 1064-1262 (2001) [Refereed Article]

Abstract

Studies on the quantitative lysine requirements of fish are numerous and have employed a range of methods. In this review, dose-response dietary lysine requirements are shown to have considerable intraspecies variation that cannot be explained by the particular laboratory variables between experiments (dietary formulation, fish growth rate, statistical model, and response criteria). Alternatively, it is demonstrated that marginal lysine intake in dose-response experiments is utilized for liveweight gain (LG) with an equivalent efficiency (54.1 mg LG.mg-1 lysine intake). Equivalent lysine utilization for LG means the lysine requirements of fish are not dissimilar when expressed relative to LG - and estimated to be 18.5 g lysine.kg-1 LG. Expressed relative to LG, lysine requirements of rainbow trout range between 15.7 and 21.1 g lysine.kg-1 LG, which represents an order of difference of only 34%. Due to a constant lysine requirement for LG, dietary lysine concentration is determined by feed efficiency ratio (kg LG.kg-1 feed intake). Consequently, increased feed efficiency with increased dietary energy results in a constant requirement expressed as lysine to energy ratio. It is recommended that future amino acid requirements of fish be expressed relative to gain (LG or protein) to improve current variation between studies.

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)
ID Code:23934
Year Published:2001
Deposited By:TAFI - Aquaculture
Deposited On:2002-08-01
Last Modified:2002-09-06
Downloads:0

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