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Animal Products
Asian-Australasian Journal of Animal Sciences 1996;9(5): 515-518.
DOI: https://doi.org/10.5713/ajas.1996.515    Published online October 1, 1996.
Relative efficiencies of yellow carotenoids for egg yolk pigmentation
D. Balnave, J. N. Bird
Abstract
The relative efficiencies of deposition into egg yolk of apo-carotenoic acid ester(APO-E, CAROPHYLL Yellow) and saponified marigold xanthophylls(MX), in the presence of canthaxanthin(CN), were determined using a wheat-based diet. APO-E was deposited with an efficiency of 50 percent and MX with an efficiency between 13 and 20 percent. The dose response relationship for MX was curvilinear with a decreased efficiency at higher concentrations. Canthaxanthin was deposited with and efficiency of 38 percent, irrespective of the source of yellow xanthophylls, up to a dietary concentration of 5.5 mg/kg. At a dietary MX concentration of 8.3 mg/kg the efficiency of deposition of CN declined to 24 percent. The results confirm that the replacement ratio of MX : APO-E is between 3 : 1 and 4 : 1 depending on the dietary inclusion of marigold pigment.
Keywords: Yolk Pigments; Apo-Carotenoic Acid Ester; Marigold Xanthophylls; Canthaxanthin


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