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

Authors: Chaimongkol A.; Boonyaratpalin M.

Source: Aquaculture Research, Volume 32, Supplement 1, December 2001 , pp. 53-59(7)

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Abstract:

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.

Keywords: dietary ash; Lates calcarifer; phosphorus; protein digestibility; seabass

Language: English

Document Type: Research article

DOI: http://dx.doi.org/10.0000/026999497378566

Publication date: 2001-12-01