We tested the hypothesis that ultraviolet photoreception contributes to prey search in small juvenile rainbow trout (Oncorhynchus mykiss) and pumpkinseed sunfish (Lepomis gibbosus) while foraging on Daphnia pulex. Small individuals of these species are ultraviolet-photosensitive zooplanktivores. For both species, prey pursuit distances and angles were larger under full-spectrum illumination tha...

The sales figures of antimicrobial (AM) drugs for farmed Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) in Norwegian aquaculture was high, although varying, in the period 1981-1994. Since then the usage in these species has been negligible in spite of the huge increase in the biomass fish produced. This is mainly due to the introduction of efficient vaccines against the m...

The objective of the present study was to examine the branchial distribution of the recently identified rainbow trout cytoplasmic carbonic anhydrase isoform (tCAc) and to investigate its role in the regulation of acid-base disturbances in rainbow trout (Oncorhynchus mykiss). In situ hybridization using an oligonucleotide probe specific to tCAc revealed tCAc mRNA expression in both pavement cell...

This study aims to examine the nutritional composition (amino acid and fatty acid) fillet color of commercially produced cultured fish Black Sea. All species [(sea bass (Dicentrarchus labrax), sea bream (Sparus aurata), turbot (Scophthalmus maximus), large rainbow trout (Oncorhynchus mykiss)] were collected from Sea’s aquaculture sites in 2020. Total amino values fillets listed as bream>...

This study aimed to investigate the effects of date (Phoenix dactylifera L.) kernel essential oil on growth and development performance parameters as well phagocytic activity, respiratory burst superoxide dismutase, lysozyme myeloperoxidase activity from immune rainbow trout (Oncorhynchus mykiss). The nutritional was performed for 45 days assess effect three concentrations (0.5, 1, 2 mL kg-1) i...

This study evaluated the effect of probiotics (Clostridium butyricum, Bacillus coagulans) and Chinese herb polysaccharides (Astragalus polysaccharides, APS) on growth performance, immunity, disease resistance, intestinal microbiota rainbow trout (Oncorhynchus mykiss). Specimens O. mykiss (n = 360; 79.9 ± 2.2 g) were fed for 42 days with different diets containing a basal diet (control, C0), sup...

We investigated the spatial and temporal relationship of catch rates and angler party location for two days following a publicly announced put-and-take stocking of rainbow trout (Oncorhynchus mykiss). Catch rates declined with time since stocking and distance from stocking. We hypothesized that opportunity for high catch rates would cause anglers to fish near the stocking location and disperse ...