Fish authentication is a major concern not only for the prevention of commercial fraud, but also for the assessment of safety risks deriving from the undeclared introduction of potentially dangerous toxic or allergenic substances or environmentally damaging fish where endangered species are involved. Moreover, food authentication might affect the diet of certain groups of consumers, such as fol...

Growth, feed conversion ratio and fillet composition of rainbow trout (initial weight of 9.99±0.109)were investigated in a 6x2 factorial design experiment employing two levels of digestible energy (DE) (2900 and 3500kcal.kg-1) and six feeding rates (1.0%, 2.0%, 3.0%, 4.0%,5.0% of the body weight,(BW) day-1 and to satiation) for 60 days. Specific growth rate (SGR) was highest at 5.0% rati...

A 10-wk growth comparison trial of two strains of channel catfish Ictalurus punctatus was conducted in 40 120-L flow-through aquaria using a 2 X 2 X 2 factorial experiment design. The three factors evaluated were: strain (Norris and NWAC103), dietary protein level (28% and 32%), and feeding rate (restricted and satiate). Average initial weight (f SD) for the Norris strain was 3.0 f 0.08 g/fish,...

We investigated occurrence, transport pathways, and effects of polybrominated diphenyl ether (PBDE) flame retardants and other endocrine disrupting chemicals (EDCs) in aquatic media and the foodweb in the lower Columbia River. In 2009 and 2010, foodweb sampling at three sites along a gradient of contaminant exposure near Skamania (Washington), Columbia City (Oregon) and Longview (Washington) in...

including industrial effluents, landfills, and equipment storage sites. PCB’s bond tightly with particulate matter, which enables PCB’s to be resuspended in lakes and streams. This resuspension has been documented to occur for up to 15 years and is indicative of the slow degradation of PCB’s (Eisler, 1986). PCB’s were detected at 78 percent of the sites sampled (fig. 13) between 1985 and 1998. ...

Knowledge of the health impact of consuming heat-treated versus raw fish fillet is limited. To investigate effects of baked or raw salmon fillet intake on lipids and n-3 PUFAs in serum and tissues, obese Zucker fa/fa rats were fed diets containing 25% of protein from baked or raw salmon fillet and 75% of protein from casein, or casein as the sole protein source (control group) for four weeks. S...

A 3×3 factorial experiment was conducted in flow-through aquaria to evaluate effects of diets, containing 0%, 4%, or 8% menhaden fish meal, on growth performance, body composition, and insulin-like growth factor-I (IGF-I) of juvenile channel catfish of Mississippi “normal” (MN), NWAC103 [formally known as USDA103], or USDA303 strains. Twenty fish with an average weight of 4.7±0.1 g fish (±S.D.)...

Tilapia is a species with great growth potential. Its production comes from semi-intensive system, such as earthen ponds (EP). Recently, biofloc technology (BFT) appears an option to intensify fish production. The objective of this work was compare the organosomatic indices, biochemical parameters, and chemical composition tilapia reared in EP BFT. Fish were grown for 150 days, initial weight ≅...

Polycyclic aromatic hydrocarbons (16 EPA list) were determined in oils, fish feed, and fillets from gilthead sea bream fed through a full production cycle (14 months) with feed containing different proportions of fish oil replaced by vegetable oils, followed by a finishing phase with fish oil. At the beginning of the study, fish presented 46.6 microg/kg fresh weight of the sum of PAHs in fillet...

in this study, the essential oil (eo) of pistacia atlantica subsp. kurdica was added at the rate of 10 g/kg of daily diet of rainbow trout and its effect on gut microbiota (enterobacteriaceae, lactobacillus spp., total count), growth performance and antioxidant status of rainbow trout fillet was investigated. sixty apparently healthy rainbow trout with an approximate weight of 150 g ±3.5 were r...