Effects of dietary starch sources on growth, nutrient utilization and liver histology of juvenile tinfoil barb (Barbonymus schwanenfeldii, Bleeker 1853)

Aquafeeds with optimum digestible starch levels provide nutritional, economic, and environmental benefits in aquaculture. Tinfoil barb juveniles can optimally utilize 19.25% dietary corn starch, but their ability to use commonly available starch sources has not been explored. This study aimed to compare the effects of starch sources on fish growth, nutrient retention, intestinal α-amylase activity and liver histology. Five experimental diets with approximately 45% crude protein and 17.5 kJ g–1 gross energy were prepared using native corn, sago and tapioca starches and taro and wheat flours. Each diet was randomly allocated to triplicate groups of 20 fish (3.34 ± 0.12 g) and feeding was done for eight weeks. Results revealed that weight gain and specific growth rate of fish did not differ among the starch sources. However, compared to corn starch, dietary taro flour increased daily feed intake of fish whereas wheat flour decreased it (P