Differences in utilisation of digestible macronutrients between two different size classes of rainbow trout (<i>Oncorhynchus</i> <i>mykiss</i>).

ABSTRACT: The aim of this study was to investigate whether fish size has an effect on the utilisation efficiency of digestible protein, digestible fat and digestible carbohydrates (Carb) for energy gain in rainbow trout. Four different diets ranging in protein, fat and Carb were fed to two size classes of rainbow trout, 30 to 75 g and 92 to 214 g, at three different feeding levels (12, 8 and 4 g/kg^0.8 per day). This led to 24 treatments with 2 replictes (tanks). Tanks contained 36 fish for the 30 to 75 g fish and 24 fish for the 92 to 214 g fish. Faeces was collected for the determination of the digestibility of protein, fat and Carb. Energy retention was determined from the initial and final body composition. The design of this trial allowed for multiple regression analysis to determine

SUBMITTER: Groot R 

PROVIDER: S-EPMC11815969 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature