Table 4.
Effects of dietary taurine on skin pigment and body color of channel catfish (Ictalurus punctatus) fed oxidized-fish-oil diets.
| FFO | OFO | OFOT | p-Value | |
|---|---|---|---|---|
| Backside | ||||
| Carotenoids (μg/mL) | 16.00 ± 0.47 b | 14.04 ± 0.32 a | 18.42 ± 0.57 c | 0.002 |
| Lutein (pg/mL) | 1746.8 ± 84.5 a | 2331.8 ± 26.0 b | 2243.5 ± 17.3 b | <0.001 |
| Tyrosinase (ng/mL) | 4986.3 ± 43.3 a | 4699.7 ± 87.4 a | 5583.0 ± 120.0 b | 0.001 |
| L* | 51.14 ± 0.49 | 53.24 ± 1.25 | 47.64 ± 2.87 | 0.125 |
| a* | −5.10 ± 0.06 a | −5.44 ± 0.08 a | −4.54 ± 0.29 b | 0.008 |
| b* | 1.60 ± 0.23 a | 2.49 ± 0.15 ab | 2.07 ± 0.25 b | 0.031 |
| Abdomen | ||||
| Carotenoids (μg/mL) | 13.18 ± 0.23 a | 13.61 ± 0.07 ab | 14.91 ± 0.64 b | 0.049 |
| Lutein (pg/mL) | 2216.0 ± 21.7 b | 2391.8 ± 22.4 c | 2083.5 ± 40.1 a | 0.001 |
| Tyrosinase (ng/mL) | 4448.0 ± 31.8 a | 4309.7 ± 57.0 a | 4693.0 ± 75.5 b | 0.009 |
| L* | 82.41 ± 0.20 b | 81.52 ± 0.25 a | 81.55 ± 0.14 a | 0.011 |
| a* | −3.47 ± 0.06 ab | −3.55 ± 0.06 a | −3.31 ± 0.03 b | 0.017 |
| b* | 8.19 ± 0.05 | 8.67 ± 0.12 | 8.01 ± 0.42 | 0.200 |
Note: Data indicate the mean values of three replicate cages per treatment (three fish per replicate breeding barrel). Mean values with different superscripts in a row are significantly different (one-way ANOVA, p < 0.05).