Muscle hyperplasia and hypertrophy dynamics in rainbow trout (<i>Oncorhynchus mykiss</i>): impact of high plant-based protein and additive mixtures on muscle physiology.

ABSTRACT: The effects of high plant-based proteins (PP) used as alternative protein sources in aquafeeds on muscle cellularity and myogenic factors of rainbow trout, Oncorhynchus mykiss, remain unclear. This study explored muscle fibre growth phases and the impact of two additive mixtures (A) in high-PP diets on muscle physiology. Over a seven-month trial, 2000 fish (2·22 g) were divided into four groups (five replicates each) and fed isonitrogenous (fry, 46 %; fingerling, 44 %; and grow-out, 42 % crude protein) and isolipidic (20 % lipid) diets: control (30 % fishmeal), PP, PP + A1 (krill meal, taurine, selenium) and PP + A2 (proline, hydroxyproline, vitamin C). Sampling for muscle histology and myogenic gene expression was conducted at ten sampling points from Day 0 to Day 214. Muscle histo

SUBMITTER: Singha KP 

PROVIDER: S-EPMC12722011 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature