Physical and chemical properties of two bones of two species of fish, hoki (Macruronus novaezelandiae)
and giant seaperch (Lates calcarifer Bloch.), were compared with chicken bone to evaluate their composition
for use as natural calcium supplement. The information could be useful for waste utilization in the food and
pharmaceutical industries. Physical testing and chemical analyses were performed according to the USP 24
and BP 1998 standards under calcium carbonate monograph. Loss on drying found in hoki, giant seaperch
and chicken bones was 12.4, 11.3 and 5.9 % w/w, calculated on dried basis, respectively. Total calcium