Nutritional properties of kutum, Rutilus frisii kutum (Kamensky), silver carp, Hypophthalmichthys molitrix (Val.), and rainbow trout, Oncorhynchus mykiss (Walbaum), correlated with body weight

Abstract

Abstract. The correlation of proximate composition and fatty acid content of the meat of brackish-water kutum, Rutilus frisii kutum (Kamensky), warm-water silver carp, Hypophthalmichthys molitrix (Val.), and cold-water rainbow trout, Oncorhynchus mykiss (Walbaum) were determined in relation to body weight. In silver carp, body protein increased (r = 0.574, P = 0.032) with increased body weight while moisture decreased (r = -0.789, P = 0.000). In kutum and rainbow trout the contents of protein and lipid were independent of fish size (P > 0.05). The n-3 polyunsaturated fatty acids of silver carp meat increased with body weight (r = 0.592, P = 0.033), while n-6 fatty acids decreased (r =-0.667, P = 0.013). The results indicated the important advantages of the nutritional quality of fish of different sizes in the human diet.

Species Variations in the Proximate Composition, Amino Acid Profile, and Protein Quality of the Muscle Tissue of Grass Carp, Bighead Carp, Siberian Sturgeon, and Wels Catfish

“…e species of sh markedly a ects the proximate composition and amino acid pro le of their muscle tissue. Depending on the species, sh muscle tissue contains 12.2-21.79% protein [1][2][3][4][5][6], 0.08-13.1% fat, and 67.3-86.7% water [1,4,7,8]. e energy value of the muscle tissue of di erent sh species, which depends on the proportion of its basic components, ranged from 210.7 to 797.5 kJ/100 g [4,9,10].…”

Correlation between body size and fatty acid and essential amino acid composition of round goby (Neogobius melanostomus) and monkey goby (Neogobius fluviatilis) from the Rhine River (Germany)

“…This suggests that in terms of essential fatty acids the value of both goby species does not increase with body size but with condition factor. Among the three commercially species studied by Ghomi et al (2012a), n-3 polyunsaturated fatty acids significantly increased (P = 0.032) with the increase of fish weight in silver carp, while n-6 fatty acids decreased (P = 0.013). Thus they concluded that silver carp of bigger size is more nutritious for humans.…”

Basic and functional nutrients in the muscles of fish: a review

“…[10,11] According to the literature, the content of nutrients in the muscles of food fish was variable. The protein content in the muscles of different fish species ranged from 12.2 to 21.79%, [12][13][14][15][16][17] and the levels of essential amino acids (g/100 g protein) ranged from 0.2 to 6.2 for isoleucine, 0.4 to 10.4 for leucine, 0.3 to 16.1 for lysine, 0.1 to 4.0 for methionine, 0.04 to 0.6 for cystine, 0.3 to 6.3 for phenylalanine, 0.2 to 1.5 for tyrosine, 0.3 to 7.9 for threonine, 0.2 to 8.6 for valine, 0.1 to 2.3 for tryptophan, and 0.5 to 7.9 for histidine. [18] The fat content in the muscles of different fish species was between 0.08 and 28.90%, [2,12,17,19,20] and the fatty acid profiles differed in the proportions of fatty acids types they contained over wide ranges.…”