Optimum dietary crude protein level for growth in South African abalone (Haliotis midae L.)

A 95‐day feeding trial was conducted to evaluate the effects of dietary crude protein level on total body weight gain and protein gain of juvenile (4.89 ± 0.57 g) South African abalone (Haliotis midae). Six semi‐purified diets containing casein, fish meal and cottonseed meal as protein sources, and...

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Bibliographic Details
Published in:Aquaculture nutrition Vol. 9; no. 2; pp. 85 - 89
Main Authors: Sales, J., Truter, P.J., Britz, P.J.
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Science Ltd 01.04.2003
Subjects:
Gossypium
growth
Haliotis midae
Marine
protein requirements
PSW, South Africa
ISSN:1353-5773, 1365-2095
Online Access:Get full text
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Summary:A 95‐day feeding trial was conducted to evaluate the effects of dietary crude protein level on total body weight gain and protein gain of juvenile (4.89 ± 0.57 g) South African abalone (Haliotis midae). Six semi‐purified diets containing casein, fish meal and cottonseed meal as protein sources, and with crude protein levels ranging from 54.8 to 479.2 g kg−1 dry matter (DM), were fed to four tanks containing 30 abalone each in a continuous flow system. No differences (P > 0.05) were found in moisture, ash or lipid content of soft‐body tissue as dietary crude protein level increased, indicating that differences (P < 0.05) in soft‐body protein content were solely due to dietary crude protein level. The relationships between dietary crude protein level and total body weight gain and protein gain were analysed by broken‐line and second‐order polynomial regression models. Based on total body weight gain, 358.7 g kg−1 DM dietary protein from good quality sources is recommended for maximum growth of juvenile H. midae, while, if dietary protein is reduced to 280.7 g kg−1 DM, growth will be depressed with 5 g kg−1.
Bibliography:ArticleID:ANU229
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SourceType-Scholarly Journals-1
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content type line 23
ISSN:1353-5773
1365-2095
DOI:10.1046/j.1365-2095.2003.00229.x