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Asda Laining
Research and Development Institute for Coastal Aquaculture, Jl. Makmur Dg. Sitakka No. 129, Maros 90512, South Sulawesi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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INFLUENCE OF DIETARY PHYTIC ACID AND PHYTASE ON GROWTH, DIGESTIBILITY, AND VERTEBRAL PHOSPHORUS OF JUVENILE JAPANESE FLOUNDER, Paralichthys olivaceus Asda Laining
Indonesian Aquaculture Journal Vol 8, No 1 (2013): (June 2013)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (975.306 KB) | DOI: 10.15578/iaj.8.1.2013.1-11

Abstract

Triplicate groups of juvenile Japanese flounder (0.56 g) were fed with six experimental diets to examine the effects of phytic acid, with or without phytase on growth performances, nutrient digestibility, and vertebral phosphorus (P) content. Diet without both phytic acid (PA) and phytase supplementation was used as control. One diet was added with 10 g PA/kg without phytase supplement. Four diets were formulated to contain two levels of phytase (1,000 FTU or 2,000 FTU phytase/kg diet) combined with 2 levels of PA (10 and 20 g/kg diet). All diets were added with 10 g/kg in-organic P to meet flounder requirement. After 50 days culture, fish fed 10PA/2,000P grew significantly (P<0.05) higher than other groups, but did not differ from fish fed 10PA/1,000P. In contrast, fish fed 10PA/0P had the lowest growth but was not different from control diet (0PA/0P). Addition of either PA or combined with phytase had no significant (P>0.05) effects on feed intake and FCR. However, fish fed 10 g PA/kg combined with phytase had significant (P<0.05) higher whole body lipid, ash, and P than other groups. Moreover, P digestibility and vertebral P content were significantly increased by dietary phytase. This finding suggested that dietary phytase had potential to enhance the growth and nutrient utilization in juvenile Japanese flounder fed diet containing phytic acid. Specifically, inclusion of 2,000 FTU phytase/kg diet gave better performances when diet containing PA at level of 10 g/kg diet.
INTERACTION BETWEEN DIETARY MINERAL AND PHYTASE ON BIOLOGICAL PERFORMANCES OF JAPANESE FLOUNDER, Paralichthys olivaceus. PART I. GROWTH, FEED INTAKE, AND WHOLE BODY MINERAL CONTENT Asda Laining; Lidemen Lidemen; Manabu Ishikawa
Indonesian Aquaculture Journal Vol 8, No 1 (2013): (June 2013)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (660.836 KB) | DOI: 10.15578/iaj.8.1.2013.13-22

Abstract

In order to determine the effect of dietary calcium (Ca), inorganic phosphorus (IP), and phytase (P) supplementation in marine fish, a 2 x 2 x 2 factorial design was arranged to observe the interrelationship between dietary Ca and IP with the presence of dietary phytase. Two levels of dietary Ca at 0% and 0.2% combined with either 0% or 0.25% of dietary IP and either with 0 and 2,000 FTU phytase/kg diet, respectively to formulate eight experimental diets. SPI-based diet was used as basal diet and the sources of Ca, IP, and phytase were similar to those used in the previous experiment. Juvenile Japanese flounder with initial body weight around 0.6 g was fed the test diets. After 30 days of feeding trial, the results showed that both dietary IP and phytase, but not dietary Ca significantly enhanced the growth and feed intake. The highest growth was achieved in fish fed a diet containing the Ca, IP, and phytase supplement among groups. Fish fed diet without the three dietary supplements had the lowest SGR and did not significantly improve by supplementing dietary Ca. Feed intake (FI) and was significantly influenced by dietary IP and phytase, not dietary Ca while feed conversion ratio (FCR) was significantly affected by all dietary treatments. Interaction effect was detected between dietary Ca and IP, between dietary IP and P on FCR. Total phosphorus content in whole body was significantly increased by supplementing all dietary treatments which was highest in fish fed 0.25 IP/0.2 Ca/P. Significant interaction was observed between dietary IP and P on this parameter. Whole body Ca content was significantly improved by either dietary IP or Ca and not dietary P. As conclusion even without inorganic Ca supplement, dietary IP at level of 0.25% or 2,000 FTU phytase/kg diet could enhance growth and FI of fish as well as whole body phosphorus content of juvenile Japanese flounder when diet basal contained organic Ca around 1.2%.
Co-Authors Lidemen Lidemen Manabu Ishikawa