Plant-derived protein sources are the most relevant substitutes for fishmeal in aquafeeds. Nevertheless, the effects of plant based diets on the intestinal microbiome especially of juvenile Rainbow trout (Oncorhynchus mykiss) are yet to be fully investigated. The present study demonstrates, based on 16S rDNA bacterial community profiling, that the intestinal microbiome of juvenile Rainbow trout...

Sustainable aquaculture, which entails proportional replacement of fish-based feed sources by plant-based ingredients, is impeded by the poor growth response frequently seen in fish fed high levels of plant ingredients. This study explores the potential to improve, by means of early nutritional exposure, the growth of fish fed plant-based feed. Rainbow trout swim-up fry were fed for 3 weeks eit...

Polymorphism. A variable number of tandem repeat (VNTR; Nakamura et al., 1987) polymorphism was detected in rainbow trout (Oncorhynchus mykiss Walbaum) using MspI and BgZII. The probe, RVF9303, was isolated from a genomic DNA cosmid library developed from the RTG-2 cell line (Wolf and Quimby, 1962). Method of Detection. Nylon filters containing rainbow trout genomic DNA digested with MspI o...

distribution of infectious hematopoietic necrosis (ihn) was studied in five major provinces producing rainbow trout(oncorhynchus mykiss)fry in iran by indirect fluorescence antibody ifatand nested-rt-pcr techniques. also the effect of time duration was examined on some positive samples after 8 months post sampling. samples of kidney, liver and spleen of rainbow trout fries collected from 27 tro...

Traditionally, fish meal and fish oil have been used as main sources of proteins and energy in the commercial fish feeds. Nowadays these ingredients have been partially substituted with materials of plant-origin (e.g. maize, wheat and soy) due to their more inexpensive price and easier availability. If contaminated plant material is used in the making of fish feed, the finished product can cont...

background: there are different activating salt solutions for sperm induction of rainbow trout (oncorhynchus mykiss) under artificial spawning condition, although some uncertainties are associated with the performance. objectives: this study was conducted to consider the effects of different concentration of calcium and magnesium ions and change of ph in the billard salt solution on sperm motil...

Flavobacterium psychrophilum is the causative agent of rainbow trout fry syndrome (RTFS), also called bacterial cold water disease (BCWD) in USA. Since being discovered in USA in the 1940s, the disease has spread to aquacultures worldwide [1]. Mortality rates as high as 90% have been reported in fry, although the mortality rate in Danish outbreaks average around 30–40%. Rainbow trout (Oncorhync...

Homozygous and hybrid clonal lines of rainbow trout (Oncorhynchus mykiss) were confirmed to be isogenic using multilocus DNA fingerprinting. Homozygous clones were produced by androgenesis and gynogenesis using gametes from androgenetic male and female rainbow trout, respectively. Isogenic F1 hybrid lines were produced by crossing homozygous fish from different strains. One line of hybrid clone...

Rainbow and brown trout have been intentionally introduced into tailwaters downriver of dams globally and provide billions of dollars in economic benefits. At the same time, recruitment and maximum length of trout populations in tailwaters often fluctuate erratically, which negatively affects the value of fisheries. Large recruitment events may increase dispersal downriver where other fish spec...

rinbow trout (oncorhynchus mykiss) is an important fish species in aquaculture. the bacterial disease caused the decline in the production of this fish. lactococcus garvieae is one of the most serious infectious agents that caused disease with economical losses in fish farms. streptococosis have signs similar to lactococcosis. therefore the definite diagnosis is sometimes complicated. in the la...