Table 2.
Results from feeding tilapia iso-nitrogenous, iso-caloric, iso-energetic diets that replaced different percentages of fish meal with N. oculata defatted biomass and of fish oil with Schizochytrium sp. whole cells.
| Dieta | ANOVA | |||||
|---|---|---|---|---|---|---|
| Referenceb | 33NSc | 66NSd | 100NSe | F value | P value | |
| Initial Wt. (g) | 33.3 ± 1.7 | 35.5 ± 2.2 | 34.9 ± 2.1 | 34.4 ± 2.2 | 0.2 | 0.88 |
| Final Wt. (g) | 139.9 ± 4.5f | 196.1 ± 23.6f,g | 168.9 ± 19.9f,g | 207.3 ± 9.8g | 4 | 0.05 |
| Wt. gain (g)h | 106.6 ± 13.1f | 160.6 ± 21.4f,g | 135.8 ± 4.6f,g | 172.9 ± 8.4g | 4.7 | 0.03 |
| Wt. gain (%)i | 318.8 ± 28.0f | 447.8 ± 34.6f,g | 392.6 ± 27.7f,g | 504.3 ± 27.3g | 7.2 | 0.01 |
| FCRj | 1.61 ± 0.1 | 1.57 ± 0.1 | 1.60 ± 0.1 | 1.40 ± 0.1 | 3 | 0.09 |
| SGRk | 0.62 ± 0.05f | 0.81 ± 0.04f,g | 0.74 ± 0.04f,g | 0.87 ± 0.03g | 6.5 | 0.01 |
| PERl | 1.23 ± 0.1 | 1.1 ± 0.0 | 1.1 ± 0.1 | 1.3 ± 0.02 | 2.9 | 0.1 |
| Survival (%)m | 93.3 ± 1.7 | 93.33 ± 0.8 | 97.5 ± 1.4 | 90.8 ± 5.5 | 0.8 | 0.49 |
aValues are means ± standard errors of three replicate groups (n = 3).
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.
hWeight (Wt.) gain (g) = final Wt. − initial Wt.
iWt. gain (%) = (final Wt. − initial Wt.)/initial Wt. × 100.
jFeed conversion ratio (FCR) = feed intake (g)/Wt. gain (g).
kSpecific growth rate (SGR) (%/day) = 100% × (ln final wet Wt. (g) − ln initial wet Wt. (g))/Time (days).
lProtein efficiency ratio (PER) = Wt. gain (g)/protein fed (g).
mSurvival (%) = (Final number of fish/Initial number of fish) × 100%.