In addition, excessive levels of Ca and P
may react with Mg and Zn to form insoluble precipitates. The result of this study
suggests that there is no dietary Ca requirement for P. monodon and this conforms with
the reports of Deshimaru and Yone 1978 and Davis et al. 1992 for Ž. Ž. P. japonicus and
P. Õannamei, respectively. Davis et al. 1993 also showed a Ca to P interaction in Ž . P.
Õannamei and found that, in the absence of dietary Ca, an available P level of 0.34%
was required for this species. For comparison, the Ca and P requirement of some other
penaeid shrimp is shown in Table 5.