Evaluation of various parameters of consumption indices of the silkworm hybrids administered with cholesterol content during 4th instar silkworms

Abstract

In the present investigation an attempt has been made to study the various parameters of consumption indices in relation to the different concentration of cholesterol supplementation during 4 th instar silkworm of FC1XFC2 and FC4XFC3 hybrids. The food consumption comprises the ingesta and digesta during 4 th instar showed the level of ingesta was significantly higher compare to digesta in all the cholesterol treated batches in all 4 days, but on 4 th day the rate of food consumption represents the highest rate of ingesta in the selected hybrids. Similarly the approximate digestibility was maintained ranging from 50-85% in cholesterol treated batches, whereas the efficiency of conversion of food ingested and efficiency of conversion of food digested were low ranging from 5-38% in FC1XFC2 and FC4XFC3 silkworm hybrids. The consumption index and coefficient of metabolism are the two nutritional parameters indicates the maximum attainment ranging from 0.8-0.9 ratio in all the days in all the cholesterol treatment concentration, whereas the growth rate was constantly maintained during 4 th instar ranging from 0-0.05 throughout the instar in FC1XFC2 and FC4XFC3 hybrids. The pattern of changes in the ingesta and digesta of 5 th instar silkworm, but cholesterol supplemented during 4 th instar extended the above parameters ranging from 9-14g from first day to day seventh, whereas the digesta falls within a range of 9g during 5 th instar in both the hybrids. The efficiency of conversion of food ingested, efficiency of conversion of food digested and approximate digestibility of 5 th instar silkworm hybrids treated with three doses of cholesterol during 4 th instar a showed the magnitude of changes above the level of 50% in FC4XFC3 hybrid, but the FC1XFC2 represents less than level of 50% except 5 th day and 7 th day during 5 th instar. The consumption index, growth rate and co-efficient of metabolism were calculated during 5 th instar the ratio was ranging from 0-1 in all the three parameters except consumption index and coefficient of metabolism on 7 th day ranging from 6-7 and 2-3 on respectively on the last day of 5 th instar in FC1XFC2 and FC4XFC3 hybrids.