Suitability and efficacy of potato as prebiotic compound on the growth performance of rohu (Labeo rohita)

Abstract

This study was carried out to determine the suitability and efficacy of the growth performance and survival rate of rohu (Labeo rohita) for a period of 63 days in the Wet Laboratory at Department of Aquaculture, BAU, Mymensingh. Four treatments were considered having three replicates containing different percentage of prebiotic (potato) in the diet viz.T1 (0%), T2 (5%), T3 (10%), T4 (15%). Initial weights of 1.74 ± 0.0 g were released at rate 15 fingerlings per aquarium. The result showed that the best weight gain of 2.73 ± 0.40 g was observed in T4. Weight gain (g), %weight gain and SGR (%per day) varied from 1.29 ± 0.25 to 2.73 ± 0.40; 74.32 ± 14.17 to 157.01 ± 22.77 and 0.38 ± 0.06 to 0.65 ± 0.06, respectively. Survival rate were 97.78 ± 2.22%, 100%, 100% and 100% in T1, T2, T3 and T4, respectively. Values of FCR, FCE and PER were varied from 2.12 ± 0.22 to 3.49 ± 0.47; 0.29 ± 0.04 to 0.48 ± 0.05, and 0.68 ± 0.09 to 1.09 ± 0.11, respectively. The highest FCR (3.49 ± 0.47) was found in T1 and lowest FCR (2.12 ± 0.22) was found in T2. The highest PER (1.09 ± 0.11) was found in T2 and lowest PER (0.68 ± 0.09) was found in T1. The research findings suggested that supplementation of 15% potato containing diet which could be chosen by fish feed manufacture and fish farmers.