Table 1.
Analyzed concentrations of astaxanthin in experimental diets 1.
| Diets | |||||||
|---|---|---|---|---|---|---|---|
| Fish Oil Replacement Level 2 | 0% | 50% | 100% | SEM | |||
| Astaxanthin Source 3 | SA | AA | SA | AA | SA | AA | |
| Plant meal-based diet | |||||||
| Astaxanthin (μg/g diet) | 42 a | 6.7 b | 33 a | 7.1 b | 32 a | 4.1 b | 0.39 |
| Fishmeal-based diet | |||||||
| Astaxanthin (μg/g diet) | 41 a | 5.8 b | 37 a | 5.1 b | 28 a | 4.0 b | 0.42 |
1 Values of means (n = 3); 2 Percent of DHA-rich microalgae (Aurantiochytrium, Heliae, Gilbert, AZ, USA) to replace menhaden fish oil (Omega Protein, Houma, LA, USA); 3 SA: synthetic astaxanthin, 4-ascorbyl polyphosphate Rovomix Stay-C 35; Carophyll pink (DSM Nutritional Products Ltd., Basel, Switzerland); AA: microalgal astaxanthin, Haematococcus pluvialis, (Heliae, Gilbert, AZ, USA). Means labelled with different letters (a, b) are different between various diets within the same series (p < 0.05).