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Effects of ash and inorganic phosphorus in diets on growth and mineral composition of seabass Lates calcarifer (Bloch)
Author(s) -
Chaimongkol A,
Boonyaratpalin M
Publication year - 2001
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1046/j.1355-557x.2001.00035_32_s1.x
Subject(s) - biology , bone ash , zoology , phosphorus , lates , nutrient , composition (language) , calcium , feed conversion ratio , food science , fish <actinopterygii> , body weight , fishery , chemistry , ecology , endocrinology , linguistics , philosophy , organic chemistry
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.