The influence of dietary protein and energy levels on growth, survival and thyroid hormone (T3 and T4) composition of Lates calcarifer larvae

L Nankervis; Paul C Southgate

doi:10.1111/j.1365-2095.2006.00406.x

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The influence of dietary protein and energy levels on growth, survival and thyroid hormone (T3 and T4) composition of Lates calcarifer larvae

Journal article

Peer reviewed

The influence of dietary protein and energy levels on growth, survival and thyroid hormone (T3 and T4) composition of Lates calcarifer larvae

L Nankervis and Paul C Southgate

Aquaculture Nutrition, Vol.12(3), pp.219-226

2006

DOI: https://doi.org/10.1111/j.1365-2095.2006.00406.x

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Abstract

barramundi

energy

fish larvae

lates calcarifer

protein

thyroid hormone

Two growth trials were conducted to determine the effects of different dietary protein (450-550 g kg-1) and energy contents (18-22 MJ kg-1) on growth, survival and carcass thyroid hormone (T3 and T4) levels of barramundi (Lates calcarifer) larvae. Larvae fed diets containing 21 and 22 MJ kg-1 dietary energy performed consistently better than those fed diets containing 18 and 19 MJ kg-1 dietary energy in terms of final dry weight and total length, while those fed 20 MJ kg-1 had intermediate values for both the parameters. No effects of dietary protein level were discernable from the physical parameters measured; however, larvae fed diets containing the lowest protein and energy combination (450 g kg -1 protein/18 MJ kg-1 energy) had significantly lower carcass T4 levels than larvae in all other treatments, except for those fed the 500 g kg-1 protein/18 MJ kg-1 diet, which had an intermediate value. The results indicate that the optimum diet for L. calcarifer larvae from 14 to 28 days after hatch should contain 500 g kg-1 protein and a minimum of 21 MJ kg-1 dietary energy. Carcass T4 content was influenced by macronutrient inclusion level, and correlated significantly with growth, described by the total length. Reduced T4 levels may indicate a depressed larval status in this species. © 2006 Blackwell Publishing Ltd.

Details

Title: The influence of dietary protein and energy levels on growth, survival and thyroid hormone (T3 and T4) composition of Lates calcarifer larvae
Authors: L Nankervis (Author) - James Cook University
Paul C Southgate (Author) - James Cook University
Publication details: Aquaculture Nutrition, Vol.12(3), pp.219-226
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2006
DOI: 10.1111/j.1365-2095.2006.00406.x
ISSN: 1353-5773
Organisation Unit: School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449328402621
Output Type: Journal article

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