Table 3.
Macro minerals and trace elements content (wet weight basis) of fillet from Nile tilapia after 184 days on the experimental diets.
| Macro minerals (%) | Referenceb | Filleta | ANOVA | |||
|---|---|---|---|---|---|---|
| 33NSc | 66NSd | 100NSe | F Value | P Value | ||
| Phosphorus | 11.92 ± 1.89 | 10.85 ± 0.78 | 12.98 ± 0.24 | 9.53 ± 0.84 | 1.75 | 0.23 |
| Calcium | 7.37 ± 2.45 | 6.43 ± 1.01 | 8.53 ± 0.73 | 3.08 ± 0.84 | 2.65 | 0.12 |
| Magnesium | 1.28 ± 0.14 | 1.19 ± 0.06 | 1.37 ± 0.06 | 1.28 ± 0.12 | 0.58 | 0.64 |
| Potassium | 18.19 ± 2.33 | 16.78 ± 0.47 | 18.83 ± 0.99 | 17.65 ± 1.55 | 0.33 | 0.8 |
| Sulfur | 10.87 ± 0.84 | 10.21 ± 0.3 | 11.65 ± 0.62 | 10.51 ± 0.26 | 1.25 | 0.35 |
| Trace elements (mg kg−1) | ||||||
| Copper | 1.74 ± 0.11 | 1.47 ± 0.17 | 1.8 ± 0.21 | 1.65 ± 0.2 | ||
| Iron | 17.43 ± 1.58 | 14.28 ± 1.07 | 19.51 ± 1.29 | 16.83 ± 1.15 | 2.8 | 0.1 |
| Manganese | 0.91 ± 0.13 | 0.75 ± 0.07 | 0.87 ± 0.08 | 0.67 ± 0.05 | 1.67 | 0.24 |
| Selenium | 0.95 ± 0.08f | 0.63 ± 0.05g | 0.84 ± 0.04f,g | 0.75 ± 0.04f,g | 6.73 | 0.01 |
| Zinc | 42.28 ± 10.92 | 32.91 ± 0.59 | 38.69 ± 1.3 | 33.46 ± 2.36 | 0.62 | 0.61 |
| Arsenic | 0.21 ± 0.04 | 0.14 ± 0.03 | 0.27 ± 0.03 | 0.14 ± 0.02 | ||
| Boron | NDh | ND | ND | ND | ||
| Aluminum | ND | ND | ND | 0.01 | ||
| Mercury | ND | ND | ND | ND | ||
| Lead | ND | ND | ND | ND | ||
| Molybdenum | 0.07 ± 0 | 0.06 ± 0.01 | 0.08 ± 0.01 | 0.08 ± 0.01 | ||
aValues are means ± standard errors of three replicate groups (n = 3); each replicate involving pooled whole tissues of 5 fish.
bReference: no replacement of fish meal (FM) and fish oil (FO).
cReplacement of 33% of FM with N. oculata and 100% of FO with Schizochytrium sp.
dReplacement of 66% of FM with N. oculata and 100% of FO with Schizochytrium sp.
eReplacement of 100% of FM with N. oculata and 100% of FO with Schizochytrium sp.
f, gMean values not sharing a superscript letter in the same row differ significantly (P < 0.05) from Tukey’s HSD test.
hNot detectable (ND) (< 0.000 µg/g).