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Effect of dietary protein and energy level on growth, protein utilization and carcass composition of rabbitfish, Siganus guttatus

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Date
1990
Author
Parazo, Monina M.
Page views
2,709
Subject
biochemical composition ASFA
feed efficiency ASFA
feeding experiments ASFA
food composition ASFA
growth ASFA
mariculture ASFA
proteins ASFA
fish culture ASFA
Siganus guttatus AGROVOC
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Abstract
Six semipurified diets comprising three levels of protein (25, 35, 45% of dry matter) each at two levels of estimated energy (3161, 3832 kcal/kg) were fed to fry for 8 weeks in 250-l tanks at a stocking density of 80 fish/tank. Growth increased with increasing dietary protein \((P\lt0.01)\) and energy \((P\lt0.05)\). Within isocaloric diets, a positive correlation was found between growth and dietary protein-to-energy \(\left(\frac{P}{E}\right)\) ratio \((P\lt0.05)\). Protein productive value (PPV) and protein efficiency ratio (PER) were negatively correlated with dietary \(\left(\frac{P}{E}\right)\) ratio. The equations describing this trend were: \(\mathsf{PPV}=50.16-0.19X\) and \(\mathsf{PER}=2.83-0.12X\), where \(X\) is \(\left(\frac{P}{E}\right)\). Based on responses for growth rate and efficiency of protein utilization, a diet with 35% protein and 3832 kcal/kg energy was found to be best for rabbitfish fry. Carcass fat levels increased in those fish fed diets with 3832 kcal/kg energy. Carcass protein and ash percentages remained essentially constant and independent of dietary treatment.
URI
http://hdl.handle.net/10862/1319
Suggested Citation
Parazo, M. M. (1990). Effect of dietary protein and energy level on growth, protein utilization and carcass composition of rabbitfish, Siganus guttatus. Aquaculture, 86(1), 41-49. https://doi.org/10.1016/0044-8486(90)90220-H 
DOI
10.1016/0044-8486(90)90220-H
Type
Article
ISSN
0044-8486
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  • Journal Articles [1156]

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