Welfare in farmed fish got particular attention during the last decades from both governmental and public sides. In aquaculture context, welfare concerns are mainly related to handling procedures, water quality and stoking densities. In Europe, authorities had to clarify the threshold limits of ...

Environmental enrichment is a promising strategy to improve the welfare of fish in captivity. However, the utilization of enrichment in aquaculture is still infrequent, maybe because there is a paucity of knowledge about how its effects depend on factors such as fish species, developmental stage,...

The species-appropriate treatment of fish is of great importance and requires the accurate assessment of the fish welfare. Aim of this study was to get a deeper insight into the welfare of rainbow trout (Oncorhynchus mykiss) during grow-out on six farms equipped with flow through systems, each...

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...

Suboptimal farm management can lead to (chronic) stress and can result in external morphological damage, which both can have deleterious effects on fish performance and welfare. This study is the first to investigate a potential correlation between chronic stress and the occurrence of external...

The present study was conducted to assess the effects of dietary tryptophan (Trp) supplementation on intestinal health in rainbow trout (Oncorhynchus mykiss) reared at two stocking densities. For this, the fish were kept at 15 (low density) or 25 (high density) kg m^-3 initial densities and fed...

The aim of the present study was to investigate the effects of dietary tryptophan (Trp) supplementation on growth performance and stress responses of rainbow trout (Oncorhynchus mykiss) at low (LD) and high (HD) stocking density. For this, three diets were formulated by supplementing 0% (control),...

The response of cultured rainbow trout to their mirrored image was investigated. Thirty fish were placed individually in two novel aquariums consecutively for 10 min each. Walls in one aquarium were covered with mirrors on all four sides, whereas the walls of the other aquarium were non-transparent ...

The goals of this study were to examine the effect of stocking density on the stress response and disease susceptibility in juvenile rainbow trout (Oncorhynchus mykiss). Fish were sorted into one of 2 stocking densities (high density "HD", 20-40 kg/m³) or (low density, "LD", 4-8 kg/m³) and 3 stress ...