Improved performance of a rainbow trout selected strain is associated with protein digestion rates and synchronization of amino acid absorption.

ABSTRACT: Replacement of fishmeal in feeds is critical for sustainable aquaculture growth. However, replacement with plant protein concentrates reduces fish performance. A rainbow trout strain selected for high performance on a plant protein diet was compared to a non-selected strain to identify physiological mechanisms associated with improved performance. Nutrient digestibility in fishmeal and plant protein diets was assessed and no strain differences were found. Levels of amino acids in the hepatic portal vein and caudal vein were measured at intervals after a single force-feeding of fishmeal, four plant protein concentrates, and a mixture of the concentrates with or without supplementation of three limiting amino acids. Each ingredient affected plasma amino acid levels in a singular manner when

SUBMITTER: Brezas A 

PROVIDER: S-EPMC7069933 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature