Growth performance of Jayanti rohu with three species combination viz., Catla catla, Labeo rohita and Cirrhinus mrigala at different stocking densities

Abstract

The present study was conducted to compare the growth performance of 9th generation Jayanti rohu with non-Jayanti rohu cultured together with Catla catla and Cirrhinus mrigala at different stocking densities for 90 days The experiment was carried out in homogenous rectangular cement cisterns in the wet laboratory of College of Fisheries, Assam Agricultural University, Raha. Four treatments with three replicates viz. Treatment-I, Treatment-II, Treatment-III and Treatment Control (reference treatment) were taken. Ten numbers of fishes were stocked in each cistern. Jayanti rohu was stocked at the rate of 35%, 40%, 45% and 0% in the treatments respectively. Non-Jayanti rohu was stocked at the rate of 40% in Control treatment The study revealed the effect of different stocking densities with better growth of Jayanti rohu in Treatment-I (35% stocking density) where stocking density of catla and mrigal was 55% and 10% respectively. The percentage weight gain of 9th generation Jayanti rohu over non-Jayanti rohu showed 31.60% in Treatment-I followed by 17.13% in Treatment-II and lowest was recorded at 6.65% in Treatment-III treatment. The result indicates better performance of Jayanti rohu in terms of net weight gain, average daily growth rate, Food Conversion Ratio (FCR), Specific Growth Rate (SGR), survivability and production compared to non-Jayanti rohu.