Table 5.
The bioaccumulation factor (means and SD) for select heavy metals for BSFL grown on three different feeds and killed by freezing or blanching (p < 0.05).
| BSFL F1 B | BSFL F1 F | BSFL F2 B | BSFL F2 F | BSFL F3 B | BSFL F3 F | |
|---|---|---|---|---|---|---|
| Al | 0.2 ± 0.46 | 0.8 ± 0.00 | 0.3 ± 0.56 | 0.4 ± 0.15 | 0.4 ±0.13 | 0.5 ± 0.19 |
| Cr | 0.3 ± 0.29 | 0.8 ± 0.00 | 1.2 ± 0.01 | 1.2 ± 0.00 | 0.1 ± 0.01 | 0.1 ± 0.00 |
| Co | 0.4 ± 0.24 | 0.5 ± 0.00 | 0.5 ± 0.00 | 0.5 ± 0.00 | 0.5 ± 0.00 | 0.3 ± 0.00 |
| As | 3.0 ± 0.45 | 2.4 ± 0.24 | 0.3 ± 0.38 | 1.1 ± 0.76 | 0.1 ± 0.24 | 0.1 ± 0.31 |
| Cd | 4.6 ± 0.08 | 7.0 ± 0.25 | 6.7 ± 0.53 | 6.9 ± 0.35 | 8.2 ± 0.26 | 12.2 ± 0.03 |
| Pb | 0.8 ± 0.12 | 1.2 ± 0.48 | 2.8 ± 0.09 | 3.2 ± 0.04 | 1.2 ± 0.01 | 1.1 ± 0.02 |
| Fe | 0.5 ± 0.02 | 1.0 ± 0.36 | 1.2 ± 0.14 | 1.4 ± 0.02 | 0.7 ± 0.01 | 0.7 ± 0.01 |
| Mn | 3.1 ± 0.04 | 2.7 ± 0.03 | 4.9 ± 0.45 | 5.0 ± 0.16 | 4.4 ± 0.03 | 4.8 ± 0.49 |
| Sn | 0.1 ± 0.01 | 0.2 ± 0.69 | 2.1 ± 0.09 | 2.3 ± 0.92 | 0.1 ± 0.18 | 0.1 ± 0.06 |
| Zn | 1.1 ± 0.040 | 1.9 ± 0.3 | 1.4 ± 0.09 | 1.5 ± 0.01 | 1.3 ± 0.02 | 1.5 ± 0.13 |
Values highlighted in bold are higher than 1 and considered heavy metals that have been accumulated from the feed. Al (Aluminum), As (Arsenic), Cd (Cadmium), Cr (Chromium), Fe (Iron), Hg (Mercury), Mn (Manganese), Pb (Lead), Sn (Tin), Zn (Zinc). F1 = Feed 1 Broiler-based; F2 = Feed 2 Brewers grain; F3 = Feed 3 Cereal grain; B—Blanched, F—Frozen.