Availability of environmental and dietary calcium in tiger puffer |
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| Authors: | M Amzad Hossain Masayuki Furuichi |
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| Institution: | (1) Fishery Research Laboratory, Kyushu University, Tsuyasaki Fukuoka, Japan |
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| Abstract: | Tiger puffer, Takifugu rubripes, juveniles were fed with four semi-purified experimental diets containing 0.2% Ca from Ca-lactate (diet 1), no supplemental Ca (diet 2) and 0.2% and 2.5% Ca from tricalcium phosphate, TCP (diets 3 and 4), respectively. After a 10 week rearing period, growth and feed utilization were significantly lower in the fish group fed on diet 2 than in the fish group fed on diet 1. Fish groups fed on diets 3 and 4 also showed poor growth performances compared with group 1. It appears that Ca intake from seawater is not sufficient for the normal growth of tiger puffer. Furthermore, Ca in dietary TCP appeared to be unavailable to this species. Dietary TCP strongly inhibited the bone mineralization of Zn and Mn. The findings indicate that easily digestible Ca supplementation is indispensable in a diet of tiger puffer for normal growth, feed utilization and bone mineralization. © Rapid Science Ltd. 1998 |
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| Keywords: | Bone mineralization Calcium uptake Feed utilization Growth Tiger puffer (Takifugu rubripes) Tricalcium phosphate |
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