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Dietary methionine spares the requirement for taurine in juvenile yellowtail kingfish (Seriola lalandi)

Citation

Candebat, CL and Booth, M and Codabaccus, MB and Pirozzi, I, Dietary methionine spares the requirement for taurine in juvenile yellowtail kingfish (Seriola lalandi), Aquaculture, 522 Article 735090. ISSN 0044-8486 (2020) [Refereed Article]

Copyright Statement

Crown Copyright 2020 Published by Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.aquaculture.2020.735090

Abstract

Taurine, a β-sulphonic amino acid, is a growth and health promoting dietary supplement in commercial finfish aquaculture. Reported recommendations for taurine supplementation in Seriola spp. feeds broadly range from 2.6 to 10.2gkg1 diet. Methionine is an essential amino acid and substrate for various metabolic compounds and acts as a methyl and sulfur donor, potentially sparing taurine. Dietary methionine requirements are currently unknown for Yellowtail Kingfish (Seriola lalandi); however, recommendations for the closely related Japanese Yellowtail (Seriola quinqueradiata) indicate that 11.1gkg1 diet is adequate. The taurine requirement and sparing effect of methionine of juvenile Yellowtail Kingfish was quantified by conducting a feeding experiment and applying a factorial, orthogonal dose-response design. Fourteen isonitrogenous and isoenergetic diets were prepared using practical raw ingredients with either one of two levels of methionine (10.90.2gkg1 or 17.20.6gkg1) and either one of seven levels of taurine, increasing from 1.6 to 20.4gkg1, respectively. Triplicate groups of 14 fish (53.30.4g fish1) were fed one of the 14 diets over seven weeks. Based on growth and feeding results, juvenile Yellowtail Kingfish do not require dietary taurine supplementations when the basal taurine diets content is at least 1.6g taurine kg−1 at a dietary methionine content of 17.20.6gkg−1 diet. This demonstrates that dietary methionine has a sparing effect on taurine supplementation. Yellowtail Kingfish fed dietary methionine exceeding the current minimum industry standard (~11.1gkg−1), grew more rapidly than those fed high dietary taurine contents at dietary methionine levels approximating that of current industry practice, indicating the indispensability of adequate methionine supply. Breakpoint analysis on the specific growth rate in Yellowtail Kingfish fed a methionine level of current industry practice, estimated a digestible taurine requirement of 1.98g kgBW1 d1 at an average digestible methionine intake of 3.4g kgBW1 d1 This equates to a dietary taurine content of 7.7gkg1 diet at a dietary methionine content of 10.9gkg1 diet. Our results indicate that in juvenile Yellowtail Kingfish: adequate dietary methionine spares dietary taurine supplementation; insufficient dietary methionine provokes a taurine requirement; and current industry specifications for dietary methionine for Yellowtail Kingfish aquafeed require reassessment.

Item Details

Item Type:Refereed Article
Keywords:taurine requirement, amino acid requirement, sparing effect, taurine, methionine, digestibility, yellowtail kingfish, Seriola lalandi
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Animal production
Research Field:Animal reproduction and breeding
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Codabaccus, MB (Dr Basseer Codabaccus)
ID Code:137704
Year Published:2020
Web of Science® Times Cited:7
Deposited By:Fisheries and Aquaculture
Deposited On:2020-02-27
Last Modified:2021-03-16
Downloads:0

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