Effects of dietary protein level during rearing period and age at overfeeding on magret and foie gras quality in male mule ducks.

TitleEffects of dietary protein level during rearing period and age at overfeeding on magret and foie gras quality in male mule ducks.
Publication TypeJournal Article
Year of Publication2018
AuthorsArroyo, J, Molette, C, Lavigne, F, Margetyal, C, Amador, O, Dubois, J-P, Fortun-Lamothe, L
JournalAnim Sci J
Volume89
Issue3
Pagination570-578
Date Published2018 Mar
ISSN1740-0929
Abstract

The aim of this trial was to study the effects of dietary protein content during the rearing period on the performance of mule ducks, according to age at overfeeding (O). Ducks (n = 612) were divided into four groups differing in the protein content in the diet offered during the starting period (S, 0-20 days; Svs. S: 150 vs. 175 g/kg crude protein (CP)) and growing-finishing period (GF; 21-67 or 81 days, depending on age at O; GFvs. GF: 133 vs. 152 g/kg CP). The relative weight of pectoral muscle was lower when ducks were fed a low protein diet during S (-5%, P < 0.01) or GF period (-6%, P < 0.001) at 68 days and higher in ducks of the SGFgroup (+6%; P < 0.05) at 82 days. Both foie gras and magret weights fell when ducks were fed Sor GF(P < 0.05 and < 0.01). Mortality during the O period was higher in ducks fed the Sdiet and overfed at late age (7.4% vs. 0%; P < 0.01). In conclusion, a reduction in the dietary protein supply should be recommended only during the GF period for ducks overfed at a late age.

DOI10.1111/asj.12941
Alternate JournalAnim. Sci. J.
PubMed ID29205698