Effects of Low Stocking Densities on Zootechnical Parameters and Physiological Responses of Rainbow Trout (Oncorhynchus mykiss) Juveniles.

ABSTRACT: The present study investigated the effect of low stocking density on growth, survival, feed parameters and physiological responses (blood metabolites, welfare indicators, immune biomarkers, and transcriptomic responses of stress and immune-related genes) on juvenile rainbow trout (Oncorhynchus mykiss) reared under a recirculating aquaculture system during 12 weeks. Fish (average weight 29.64 g) were reared in triplicate under four initial densities: nine fish per tank (D9, 3.76 ± 0.06 kg/m3), 18 fish per tank (D18, 7.66 ± 0.18 kg/m3), 27 fish per tank (D27, 9.67 ± 0.01 kg/m3) and 36 fish per tank (D36, 12.94 ± 0.14 kg/m3). Results showed that lower stocking density D9 significantly altered survival with several fish dying during the experiment and an alteration of growth and feed efficienc

SUBMITTER: Roy J 

PROVIDER: S-EPMC8533621 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature