Effects of ash and inorganic phosphorus in diets on growth and mineral composition of seabass Lates calcarifer (Bloch)

• Published in: Aquaculture research Vol. 32; no. s1; pp. 53 - 59
• Main Authors: Chaimongkol, A, Boonyaratpalin, M
• Format: Journal Article
• Language: English
• Published: 01.12.2001
• Subjects: Brackish; Freshwater; Lates calcarifer; Marine
• ISSN: 1355-557X
• DOI: 10.1046/j.1355-557x.2001.00035.x

Seabass fingerling of average mass 1.28 g were fed with low-ash diets (diets 1-4) and high-ash diets (diets 5-8) supplemented with mono-sodium phosphate containing phosphorus at 0, 0.25, 0.50 and 1.0%, respectively. Fish were fed to satiation twice daily for 12 weeks in a flow-through system. The results indicated that dietary ash and supplemented P at tested levels had no significant effects on growth. The supplementation of 0.5 and 1.0% P in low-ash diet resulted in significantly increased whole-body P, and supplemented P at 0.5% led to a significant increase in whole-body zinc. The highest levels of P and Zn in bones were noted in fish fed diet 2. Apparent digestibility of protein in fish fed low-ash diets was significantly higher than in fish fed high-ash diets. Calcium, magnesium, P and Zn retention in fish fed low-ash diets were significantly higher than in fish fed high-ash diets. The results indicate that low-ash diets without supplemented P satisfy the needs of the fish for growth and bone mineralization without causing adverse effects on the utilization of other minerals and pollutes less than high-ash diets.