Table 6.
Mineral composition of gilthead sea bream by-products (mg/100 g).
| Minerals | Muscle | Fishbone | Gills | Guts | Head | Liver | Skin | SEM | Sig. |
|---|---|---|---|---|---|---|---|---|---|
| Macro-minerals | |||||||||
| Calcium | 29.11 a | 1618.83 b | 1873.24 c | 19.44 a | 2389.24 d | 12.81 a | 158.60 a | 92.72 | *** |
| Magnesium | 34.68 b | 30.70 ab | 47.90 c | 34.40 b | 28.04 ab | 49.49 c | 26.71 a | 1.15 | *** |
| Phosphorous | 256.38 a | 989.20 b | 955.92 b | 180.51 a | 1312.27 c | 207.93 a | 224.85 a | 42.80 | *** |
| Potassium | 343.45 f | 300.67 e | 134.95 ab | 153.39 b | 184.53 c | 118.58 a | 223.97 d | 8.44 | *** |
| Sodium | 100.00 a | 98.00 a | 258.80 c | 157.93 b | 159.30 b | 308.79 c | 119.24 ab | 9.58 | *** |
| Micro-minerals | |||||||||
| Copper | 0.28 d | 0.14 abc | 0.18 bcd | 0.23 cd | 0.04 a | 0.54 e | 0.11 ab | 0.02 | *** |
| Iron | 1.01 b | 0.69 ab | 2.12 c | 1.98 c | 0.45 a | 3.82 d | 0.69 ab | 0.11 | *** |
| Zinc | 0.46 a | 1.40 b | 2.12 d | 1.91 cd | 1.71 bc | 3.46 e | 2.14 d | 0.10 | *** |
| Manganese † | 19.00 a | 206.76 d | 585.07 e | 63.64 b | 211.14 d | 154.70 c | 33.69 ab | 16.99 | *** |
a–f Means in the same row with different letters differ significantly (p < 0.05; Duncan test). SEM: standard error of the mean. Sig.: significance; ***: p < 0.001. † The manganese contents are expressed as µg/100 g.