We evaluated the eficacy of povidone-iodine treatments in preventing vertical transmission of Flavobacterium psychrophilum in the eggs of masu salmon Oncorhynchus masou, Japanese char Salvelinus pluvius, coho salmon O. kisutch and rainbow trout O. mykiss. When newly spawned eggs were immersion-chalenged with F. psychrophilum (> 10 CFU/mL) and subsequently disinfected with povidone-iodine (50 pp...

Chlorpyrifos (CPF) is an organophosphate pesticide, commonly detected in water and food. Despite CPF toxicity on aquatic species has been extensively studied, few studies analyze the effects of fish transcriptional pathways. The Pregnane X receptor (PXR) a nuclear that activated by binding to wide variety ligands regulates transcription enzymes involved metabolism transport many endogenous exog...

Development rate has important implications for individual fitness and physiology. In salmonid fishes, development rate correlates with many traits later in life, including life-history diversity, growth, and age and size at sexual maturation. In rainbow trout (Oncorhynchus mykiss), a quantitative trait locus for embryonic development rate has been detected on chromosome 5 across populations. H...

Investigations on the epizoic fauna of Gadus morhua (L.), Platichthys flesus (L.) and Oncorhynchus mykiss (Walbaum) from the Kiel Fjord and Kiel Bight were carried out from September 1996 to March 1997. Smears from 120 G. morhua and 92 P. flesus caught using fish traps and trammel nets, and of 35 O. mykiss obtained from a local fish farm in the Kiel Fjord revealed the presence of three species ...

Deoxynivalenol (DON), produced by the Fusarium genus, is a major contaminant of cereal grains used in the production of fish feed. The effect of mycotoxin deoxynivalenol on rainbow trout (Oncorhynchus mykiss) was studied using a commercial feed with the addition of DON in a dose of 2 mg/kg feed. The fish (n=40) were exposed to the mycotoxin for 23 days. The trout were divided into two groups, c...

The introduction of alien predatory fish such as rainbow trout ( Oncorhynchus mykiss ) can have a significant effect on indigenous communities altering the structure and dynamics food webs. Quantifying trophic niche utilised by species is therefore important to aid our understanding how their feeding strategies might establishment, define functional role inform potential impacts. This study ass...

In this study, fatty acid composition, fat soluble vitamins (retinol, D2, D3, δ-tocopherol, α-tocopherol, K1, K2) and cholesterol content of farmed rainbow trout (Oncorhynchus mykiss) were investigated. The results show that there were significant differences in saturated fatty acids (SFAs) and polyunsaturated fatty acids (PUFAs) contents between trout muscle and diet (P<0.01 and P<0.05, respec...

Rapid adaptation to novel environments may drive changes in genomic regions through natural selection. Such changes may be population-specific or, alternatively, may involve parallel evolution of the same genomic region in multiple populations, if that region contains genes or co-adapted gene complexes affecting the selected trait(s). Both quantitative and population genetic approaches have ide...

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...