Many Appalachian streams historically dominated by Brook Trout Salvelinus fontinalis have experienced shifts towards fish communities dominated by Rainbow Trout Onchorhynchus mykiss. We used empirical estimates of biomass and secondary production of trout conspecifics to evaluate species success under varied thermal regimes. Trout populations were sampled in 13 Appalachian streams from Maryland...

Ahstracr.-This study evaluated the effects of dietary protein concentration (26, 28, and 32%) on growth. feed efficiency, processing yield, and body composition of USDA 103 and Mississippi “normal” (MN) strains of channel catfish raised in ponds. Fingerling channel catfish (average weight = 32.5 and 47.3 g/fish for USDA103 and MN strains, respectively) were stocked into 24 0.04-ha ponds (12 pon...

Pharmaceuticals and personal care products are being increasingly reported in a variety of biological matrices, including fish tissue; however, screening studies have presently not encompassed broad geographical areas. A national pilot study was initiated in the United States to assess the accumulation of pharmaceuticals and personal care products in fish sampled from five effluent-dominated ri...

Background The increasing demand for raw or undercooked fish products, supplied by both aquaculture and fisheries, raises concerns about the transmission risk to humans of zoonotic parasites. This has led current European Union (EU) Regulation No 1276/2011 amending Annex III (EC) 853/2004 mandating a freezing treatment such products. Zoonotic parasites, particularly anisakid larvae, have been w...

quality grading and nutrition value determination of fish are. nowadays necessary for aquatic processing. the present study was conducted to investigate a new, applied and cheap method of fillet quality grading for common carp (cyprinus carpio) using fish size, based on mathematical equations. for this reason, 61 specimens of cultured market size carp were used and after filleting, their moistu...

Background: Due to high content of unsaturated fatty acids, trout is susceptible to oxidative spoilage. In this study, the effects of Thymus vulgaris Essential Oil (EO) and extract on oxidative stability of cooked rainbow trout fillet during four months frozen storage period were investigated. Methods: Three groups of fish fillets were treated with thyme EO and three other groups were treate...

Interspecific hybridisation may improve the farm performance of sterile triploid salmonids via heterosis (i.e. hybrid vigour). We assessed growth over final 293 days in seawater, and harvest quality, diploid Atlantic salmon (Salmo salar) × brown trout trutta) hybrids compared to salmon. measured vertebral deformities, cataracts, flesh colour, gut mass, body shape at harvest. In triploids, had n...

Complex three-dimensional vortex flows develop at the junction of a gas turbine airfoil and its casing (endwall). These flows increase the transfer of heat from the combustion gases to the metal parts and contribute to reduced aerodynamic efficiency. Past studies have shown that the use of a large fillet at the airfoil-endwall junction can reduce or eliminate the endwall vortex flow pattern. To...