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Fattening ability of Muscovy, Pekin and their hybrids, hinny and mule ducks

INRA Prod. Anim., 18(2), 131-141.

E. BAEZA ¹, N. RIDEAU ¹, P. CHARTRIN ¹, S. DAVAIL ², R. HOO-PARIS ², J. MOUROT ³, G. GUY ⁴, M.-D BERNADET ⁴, H. JUIN ⁵, K. METEAU ⁵, D. HERMIER ⁶

1 INRA, Station de Recherches Avicoles , F-37380 Nouzilly 

2 IUT des Pays de l’Adour, Laboratoire de Nutrition et Biologie Appliquée, F-40000 Mont de Marsan
3 INRA, UMR, Systèmes d’Elevage Nutrition Animale et Humaine, F-35590 St Gilles
4 INRA Artiguères, Unité Expérimentale des Palmipèdes à Foie Gras, F-40280 Benquet
5 INRA Le Magneraud, Unité Expérimentale sur l’Elevage Alternatif et la Santé des Monogastriques, F-17700 St Pierre d’Amilly
6 INAPG, UMR Physiologie de la Nutrition et du Comportement Alimentaire, F-75005 Paris

Abstract 
Muscovy duck has a higher susceptibility to hepatic steatosis than Pekin duck which exhibits a higher fattiness in adipose and muscle tissues. Actually, Muscovy duck has a more efficient hepatic lipogenesis but its ability to export lipids is lower. Moreover, the activity of lipoprotein lipase is also lower in Muscovy duck, particularly at the end of overfeeding period, which enhances the return of circulating triglycerides to the liver. By comparison with the parental species, hinny and mule ducks always present intermediate values for all these parameters except for feed ingestion capacity and fatty liver weight for which they benefit from a heterosis effect.

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