Effects of Dietary Tricalcium Phosphate on the Growth and Mineral Availability in Japanese Flounder

A lO-wcck i"eeding trial l,vas conducted to investigate the effects of dietar:y trieakium plwsphat.p (Tep) on gnnvt.h ami mineral availability in juvenile Japanese flounder (PamJirhthys nU1Jare1J..<» A O.2f}IX) \':1. SllpplpTllPnl. from \'(l-I(lc1.(lt.e 1.0 Ow dip! (did 2) significantly increased the gro\\-1.h of fish compared to t.hp basal dipt. 1 \,,'itho111 a Ca supplement. However, a dietary supplement of 2.5% ea from TCP (diet :3) did not. improve the gro\',th and decreased Zn and 1-1n contents of bone ;.vhen compared to the basal diet. 1. A 0.20% Ca supplement. from ea-lactate to the diet (diet /1), in addition TO t.he 2.Q!YI! Ca supplpment. from TCP, also could not improve t.he growt.h and Zn and Mn contents of bone. A Zn supplement to Lht" did (diet fi), in addition t.o t.he 2.5% Ca supplement from TCP, increased the Zn content of hone but did not improve the grov,1.h. The present st.udy suggest.s t.hat dietary Tep int.roduces UCCl"(..':Jscd growlh ami low availability or 7,n and Mn in Japanese flounder and t.hat. easily digestible Ca supplememation to the TeP-Mched diet. alone can not. irnprove the growth and mineral availability. In a TCP,·riched diet (fish meal diet, [or example), both easily digestible Ca and higher aIllounrs o[ Zn and Mn supplements may be necessary for obtaining improved grov.th and mineral availabilit.y in juvenile .Japanese flounder.