Table 3.
Data of mineral composition of by-product samples (head, gills, intestines, trimmings, bones, skin) of meagre and gilthead sea bream fishes in two different size classes (large and small) and the RDA and AI percentages.
| By-Product Nutrient Composition | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Meagre | (mg/g) | Head | Gills | Intestines | Trimmings | Bones | Skin | ||||||||||||||||||
| Large | Small | Large | Small | Large | Small | Large | Small | Large | Small | Large | Small | ||||||||||||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
| Calcium (Ca) | 5.02 | 0.72 | 8.59 | 1.13 | 5.88 | 0.23 | 6.80 | 0.12 | 0.61 | 0.04 | 0.58 | 0.10 | 12.82 | 0.34 | 46.58 | 1.34 | 6.39 | 0.93 | 9.58 | 0.57 | 5.59 | 0.71 | 3.90 | 0.08 | |
| Sodium (Na) | 4.07 | 0.37 | 4.92 | 0.56 | 5.52 | 0.13 | 5.92 | 0.27 | 2.53 | 0.12 | 2.12 | 0.57 | 5.87 | 0.99 | 3.72 | 0.43 | 3.46 | 0.11 | 2.76 | 0.73 | 4.42 | 0.28 | 3.15 | 0.17 | |
| Potassium (K) | 6.31 | 1.05 | 8.30 | 0.87 | 8.55 | 1.06 | 9.34 | 0.77 | 8.92 | 1.03 | 4.86 | 1.13 | 6.92 | 1.02 | 6.65 | 0.66 | 7.62 | 0.24 | 8.92 | 0.23 | 8.46 | 1.03 | 9.33 | 1.12 | |
| Magnesium (Mg) | 0.24 | 0.19 | 1.34 | 0.44 | 1.37 | 0.17 | 3.52 | 0.82 | 2.51 | 0.55 | 1.49 | 0.67 | 0.71 | 0.04 | 2.46 | 0.25 | 0.67 | 0.13 | 0.45 | 0.12 | 0.43 | 0.03 | 0.76 | 0.32 | |
| % RDA/AI (Ca) * | 50 | 86 | 59 | 68 | 6 | 6 | 128 | 466 | 64 | 96 | 56 | 39 | |||||||||||||
| % RDA/AI (Na) * | 27 | 33 | 37 | 39 | 17 | 14 | 39 | 25 | 23 | 18 | 29 | 21 | |||||||||||||
| % RDA/AI (K) * | 13 | 18 | 18 | 20 | 19 | 10 | 15 | 14 | 16 | 19 | 18 | 20 | |||||||||||||
| % RDA/AI (Mg) * | 8 | 42 | 43 | 110 | 78 | 47 | 22 | 77 | 21 | 14 | 13 | 24 | |||||||||||||
| Gilthead Sea Bream | Calcium (Ca) | 8.59 | 0.43 | 5.62 | 1.02 | 4.52 | 0.72 | 7.59 | 0.33 | 0.24 | 0.09 | 0.67 | 0.25 | 42.38 | 0.11 | 11.49 | 0.45 | 9.23 | 0.34 | 7.92 | 1.10 | 2.10 | 0.92 | 0.50 | 0.02 |
| Sodium (Na) | 3.68 | 0.21 | 3.28 | 0.21 | 4.26 | 0.82 | 4.54 | 0.72 | 3.01 | 0.79 | 2.39 | 1.01 | 6.81 | 0.35 | 6.08 | 0.26 | 3.43 | 0.14 | 3.79 | 0.99 | 3.52 | 0.13 | 1.34 | 0.22 | |
| Potassium (K) | 6.47 | 0.92 | 6.40 | 1.02 | 7.04 | 0.11 | 8.16 | 0.13 | 4.65 | 0.15 | 7.83 | 1.73 | 7.09 | 0.13 | 8.09 | 1.00 | 6.92 | 0.88 | 8.35 | 0.37 | 7.44 | 0.32 | 8.66 | 0.64 | |
| Magnesium (Mg) | 0.86 | 0.43 | 0.28 | 0.29 | 0.64 | 0.31 | 2.49 | 0.46 | 1.61 | 0.17 | 2.84 | 0.12 | 3.34 | 1.04 | 0.77 | 0.25 | 0.33 | 0.06 | 0.30 | 0.09 | 0.58 | 0.36 | 2.10 | 0.03 | |
| % RDA/AI (Ca) * | 86 | 56 | 45 | 76 | 2 | 7 | 424 | 115 | 92 | 79 | 21 | 5 | |||||||||||||
| % RDA/AI (Na) * | 25 | 22 | 28 | 30 | 20 | 16 | 45 | 41 | 23 | 25 | 23 | 9 | |||||||||||||
| % RDA/AI (K) * | 14 | 14 | 15 | 17 | 10 | 17 | 15 | 17 | 15 | 18 | 16 | 18 | |||||||||||||
| % RDA/AI (Mg) * | 27 | 9 | 20 | 78 | 50 | 89 | 104 | 24 | 10 | 9 | 18 | 66 | |||||||||||||
* Mineral concentration was calculated as mg/g of dry matter; RDA/AI percentages for the content of 100 g of dried sample were calculated based on the following values: 1000 mg for Ca, 4700 mg for K, 329 mg for Mg, and 1500 mg for Na [31].