Studies on the evaluation of supplementary feed on the growth and body mass in commercially important fish species
Aruna Devi M, Benarjee G
A study was conducted to determine the efficacy of supplementary feed on the growth rate of three Indian major carps Catla catla, Labeo rohita and Cyprinus carpio. The study was conducted for a period of six months from July to December. The fish fingerlings were used to evaluate the growth and weight against the formulated food. The evaluation of efficiency of the fish feed used in the present study was naturally and easily available and low cost food products and ultimately its objective is to evaluate the cost effective feed in order to minimize the expenditure in fish culture practices. The results revealed that the Catla catla have grown up to 6.060±0.05 cms.in length and 8.560±0.05gms in weight. It is observed that the FCR was 8.624±0.05 and SGR was 0.988±0.00 and the statistical analysis showed that the results are significant (P<0.05) in Catla catla when it is fed with experimental feed containing cotton seed, Azolla and Bengal Gram. The fingerlings of Labeo rohita fed with same feed have also shown an increase of 6.040±0.05cms in length and 8.540±0.08gms in weight, FCR was 8.624±0.06 and SGR was 0.990±0.00. The statistical analysis showed that this results are significant (P<0.05). Next to Catla catla and Labeo rohita the another fish, Cyprinus carpio has gained 6.040±0.05cms. length and 8.520±0.10gms weight, the FCR and SGR was 8.610±0.08 and 0.992±0.00 respectively. The Statistical analysis showed that it is significant (P<0.05). Therefore by using experimental feed body length, weight and all the changes were satisfactory and found to be statistically significant over the control values. The result of present study revealed that there is a considerable increase in the growth in both length and weight of all the three species of fishes, when they were fed with experimental feed. Thus the experimental feed was proved to be highly effective and economical.