Author(s): Umita Sah, Yuktilal Mukhiya and Nita Pradhan

Abstract: The fish culture is to increase the survivability, growth and fish production mainly depends upon the low cost inputs. The low cost greatly depends on the supply of quality feed containing appropriate proportion of different energy of nutrients. An experiment was conducted at regional agriculture research station (RARS) Tarahara, Nepal for 90 days during December, 2017 to March, 2018. The research was conducted in earthen pond which was partition by nylon nets. The size of partition was 80 m² (10×8 m²). The stocking densities of farmed rohu (FR) and genetically improved strain rohu (FIR) was 1 f/ m². The stocking size of both fish was 9.11±1.18 and 10.57±1.97g, respectively during the experimental period. There was three treatments viz: mash feeding, pellet feeding and control (only fertilization of pond) with three replications. The feeding frequencies were 2 times per day. The fish received feed as 5% of their body weight. The protein level of mash feed and pellet feed was 20 and 19.7% respectively. The harvested growth rate of genetically improved rohu was significantly (P<0.05) higher 47.32±10.01 g than farmed rohu was 36.03±11.50 g which was based on pellet feed. Similarly, harvested growth rate of both fish, feeding to pellet feed was significantly (P<0.05) higher 54.44±11.78 g than mash feeding was 40.80±4.09 g and control was 23.70±3.52 g. The interaction between fish species and feeding forms i.e FR: mash was 43.38±2.11 g, FR: pellet was 43.91±1.30 g, FR: control was 20.60±0.96 g, similarly, FIR: mash was 50.21±1.53 g, FIR: pellet was 64.21±1.64 g, FIR: control was 26.78±1.79 g. The result showed that the growth of genetically improved rohu of different feeding treatments were significantly (P<0.05) higher than farmed rohu. But growth of genetically improved rohu based on pellet feed showed better performance than others feed. The FCR recorded on mash feeding was 5.1:1 and pellet feeding was 2.2:1. In Nepal, feeding practices are not well developed that mostly farmers are used under feeding and over feeding practices. So that this study helps to farmers by adaptation of feeding practices and their impact of fish production.

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