Pre-harvest Modulation of N-3 Long-chain Polyunsaturated Fatty Acids in Rainbow Trout Meat for Human Consumption

Abstract

Since post-harvest improvement of food quality depends on the pre-harvest stage, controlling food quality at the pre-harvest stage is being recognized as an important aspect of food processing technology. n-3 Long-chain polyunsaturated fatty acids (n-3 LCPUFAs) are considered important factors in the suppression of cardiovascular disease and development of the infant brain and visual functions. Fish meat generally contains a larger amount of n-3 LCPUFAs than meat from terrestrial animals, but the amount of n-3 LCPUFAs in fish meat depends on their dietary fatty acid intake. In order to supply n-3 LCPUFAs to consumers, we developed a finishing-up method, through a 4-day lysine-deficient diet feeding for rainbow trout (Oncorhynchus mykiss) meat. This 4-day lysine deficiency did not affect fish body weight, while significantly increased the total lipid content in the muscle tissue. In addition, docosahexaenoic acid and total n-3 fatty acid contents increased significantly in the meat throughout the 4-day finishing treatment. We concluded that the finishing-up method using short-term lysine-deficient diet feeding enables us to enrich fish meat with n-3 fatty acids for human consumption.

Effects of arginine supplementation on growth performance and plasma arginine, ornithine and citrulline dynamics of rainbow trout, Oncorhynchus mykiss

“…methionine and amino acid chelates) and enzymes (Apines-Amar et al, 2004;Hanini et al, 2013;Matsukura, Iino, Haga, Kitagima, & Satoh, 2017;Rodriguez-Estrada, Satoh, Haga, Fushimi, & Sweetman, 2009. Moreover, it has been suggested that dietary amino acid manipulation is an effective method of improving fillet quality in farmed fish (Yoshinaga, Ushio, Haga, & Satoh, 2018). Arginine is an amino acid, which is known to have functional roles and is considered as a potential supplement candidate.…”

Microstructural Evolution, Intermetallic Formation, and Mechanical Performance of Dissimilar Al6061–Ti6Al4V Static Shoulder Friction Stir Welds

“…A study by Sun et al [ 53 ] showed that the residual stress present in the material is directly proportional to its strain energy. This strain energy ( ε ) can be expressed aswhere G is the shear modulus (26.1 × 10 3 MPa), b is the Burgers vector (0.286 nm), and ρ is the density of geometrically necessary dislocations, which can be calcualted using the equation below: [ 54 ] where α = 3 is a constant corresponding to geometry of the boundary, u is the step size during the EBSD analysis (0.8 μm), θ is the average misorientation angle across the boundaries, which can be calculated aswhere β is the average KAM value. In this study, both the joints fractured at the Ti interface.…”