the object of this study was detecting protein and lipid contents on two types on iranian oncorhynchus mykiss & franciscan oncorhynchus mykiss for detect better samples on quality. in this research two methods were used for determining lipids (suxeleh) and proteins (kajheldal). results have revealed the lipid contents in iranian samples were 4.88 , 5.18 and 5.96 and in franciscan samples were 4...

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...

Allelic variation at 10 microsatellite loci was assayed in potentially wild Oncorhynchus mykiss 32 collected from 11 tributaries and three upper main stem river sites (n=547), and compared to steelhead 33 trout from the hatchery operated in the lower main stem river (n=333). The objective was to investigate 34 microgeographic genetic structure of wild O. mykiss , in the face of large-scale hatc...

Transformation of earth's ecosystems by anthropogenic climate change is predicted for the 21st century. In many regions, the associated increase in environmental temperatures and reduced precipitation will have direct effects on the physiological performance of terrestrial and aquatic ectotherms and have already threatened fish biodiversity and important fisheries. The threat of elevated enviro...

(2008). The effects of the acetic acid " pain " test on feeding, swimming, and respiratory responses of rainbow trout (Oncorhynchus mykiss).

The ultra-fast quantitative real-time polymerase chain reaction (qPCR) assay was developed and validated to differentiate the morphologically similar ones, Oncorhynchus keta mykiss. Species-specific primers were designed for COI genes of mtDNA. species-specific O. mykiss selectively amplified by DNA, respectively. sensitivity 1 ng/μL. Quantitative testing showed that results met ‘Guidelines on ...

Ten primer pairs were screened to develop single nucleotide polymorphism (SNP) TaqMan assays that will distinguish California golden trout and some rainbow trouts (Oncorhynchus mykiss sspp., O. m. aguabonita) from the Paiute and Lahontan cutthroat trouts (Oncorhynchus clarkii seleniris, O. c. henshawi). From these 10 primer pairs, one mitochondrial and five nuclear fixed SNP differences were di...

Oncorhynchusmykiss exhibits a vast array of life histories, which increases its likelihood of persistence by spreading risk of extirpation among different pathways. TheKlamathRiver basin (California–Oregon) provides a particularly interesting backdrop for the study of life history diversity inO. mykiss, in part because the river is slated for a historic and potentially influential dam removal a...

Adult steelhead Oncorhynchus mykiss tagged with archival transmitters primarily migrated through a large river corridor at depths >2 m interspersed with frequent but short (<5 min) periods closer to the surface. The recorded swimming depths and behaviours probably provided adequate hydrostatic compensation for the supersaturated dissolved gas conditions encountered and probably limited developm...

The species Oncorhynchus mykiss is characterized by a complex life history that presents a significant challenge for population monitoring and conservation management. Many factors contribute to genetic variation in O. mykiss populations, including sympatry among migratory phenotypes, habitat heterogeneity, hatchery introgression, and immigration (stray) rates. The relative influences of these ...