CALCIUM AND PHOSPHORUS PROFILE OF BLOOD PLASMA AS INFLUENCED BY DIETARY CALCIUM AND AGE IN JAPANESE QUAILS'
P. T. Philominai, M.G. Ramakrishna Pillai
The ability of birds to produce quality egg shells depends on the availability of sufficient amounts of calcium. Therefore, dietary calcium intake is the major factor in the regulation of their egg shell quality. A prospective laying bird makes a precautionary preparation as the formation of medullary bone and then increase in storage and mobilisation of calcium to meet the ensuing emergency of an increased demand for calcium during egg shell formation (Hurwitz and Griminger, 1960). Perusal of available literature indicated that information on the physiology of calcium utilisation in egg shell formation is meagre in Japanese quails. The present investigation was undertaken as a pilot study to probe the influence of prelaying and layer dietary calcium levels on egg shell calcification in Japanese quails. The influence of dietary calcium levels and age (stage of egg production) on the calcium and phosphorus profile of plasma was investigated.