Along the plant ingredients, rendered animal protein sources such as blood meal, meat and bone meal and poultry by-product meal have potential to be replaced by fishmeal in rainbow trout feed. Therefore, the main objective of the present study is to determine the effect of full replacement of fishmeal by poultry by-products meal (PBM) on fish performance, nutrient digestibility and also liver c...

the pollutants due to effect on the immune system of fish increase fish sensitivity to pathogens. diazinon is one of the most used organophosphates pesticide in many agricultural areas. this study aimed to evaluate the effect of diazinon on the immune system of rainbow trout ( oncorhynchus mykiss ) and application of milk thistle plant, vitis vinifera extract to reduce the adverse effects of th...

nowadays, using natural preservatives than synthetic ones is increasing. the present study was aimed to compare the effect of thyme (zataria multiflora boiss), onion (allium cepa) and ziziphora clinopodioides extracts on shelf-life extending of rainbow trout (oncorhynchus mykiss) salted, vacuum packaged fillet, kept at 4°c. for this purpose fish filets were kept in 4 treatment: salted in brine ...

in this research psedomonas fluorescens as a probiotic, sodium chloride, plant extract (terminalia catappa), malachite green and formalin as antifungal agents were used daily for 19 days on rainbow trout fertilized eggs in order to compare their survival with untreated fertilized eggs in control group. results showed that the percent of live eggs (eyed) after 19 days treatment with p. fluoresce...

propolis, a resinous substance collected by apis mellifera bees from various plant sources is transformed in the presence of bee enzymes. short- and long-term effects of diet supplementation with ethanol extract of iranian propolis (eeip) was investigated on growth and immunity in juvenile rainbow trout. the fish (mean body weight 30 ± 3.2 g) were fed a commercial diet supplemented with 0 (cont...

Along the plant ingredients, rendered animal protein sources such as blood meal, meat and bone meal and poultry by-product meal have potential to be replaced by fishmeal in rainbow trout feed. Therefore, the main objective of the present study is to determine the effect of full replacement of fishmeal by poultry by-products meal (PBM) on fish performance, nutrient digestibility and also liver c...

Much has been written about introduced rainbow trout interbreeding and outcompeting native cutthroat trout. However, the specific mechanisms by which rainbow trout and their hybrids outcompete cutthroat trout have not been thoroughly explored, and most of the published data is limited to lotic ecosystems. Samples of Snake River cutthroat trout (Oncorhynchus clarkii bouvieri), the rainbow-cutthr...

BACKGROUND Estimates of fishing and natural mortality are important for understanding, and ultimately managing, commercial and recreational fisheries. High reward tags with fixed station acoustic telemetry provides a promising approach to monitoring mortality rates in large lake recreational fisheries. Kootenay Lake is a large lake which supports an important recreational fishery for large Bull...

Six triploid individuals were found in a full-sib family of 11 adult rainbow trout (Salmo gairdneri) from a domesticated hatchery stock. The triploid individuals were normal in size and external appearance, had underdeveloped gonads, and showed no evidence of 3n/2n chimerism or mosaicism. XXY triploids were males, suggesting that the Y chromosome is male determining in trout. Because they may a...

—Taurine has been demonstrated to be conditionally indispensable for several carnivorous fish species. Current trends in trout production include decreasing levels of fish-meal content in feeds, along with faster growing strains of fish. Taurine may be a limiting nutrient in support of elevated planes of growth for rainbow trout. A 9-wk feeding trial was conducted using a factorial treatment de...