INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France.
Animal. 2013 Apr;7(4):682-7. doi: 10.1017/S1751731112002121. Epub 2012 Nov 20.
The aim of this study was to analyse the effects of species (Muscovy and Pekin ducks) and age at the beginning of the overfeeding period on fatty liver production, carcass composition and lipid and moisture content of the liver and breast muscle. We reared four groups of 40 ducks per species for the study, starting at 2-week intervals in order to have four different ages together at the beginning of the overfeeding period (10, 12, 14 and 16 weeks). At the end of the overfeeding period, all ducks were slaughtered. Our results confirmed the high levels of difference in carcass composition and lipid content in the plasma, liver and breast muscle between Muscovy and Pekin ducks at all ages. Pekin ducks were not able to develop a high degree of hepatic steatosis, but had increased lipid storage in peripheral adipose and muscle tissues than Muscovy ducks. However, the fatty liver weight of Pekin ducks increased with age, with lipid deposition in the liver and peripheral tissues. The ability of Muscovy ducks to produce fatty livers remained unchanged with age in line, with lipid deposition in the liver and peripheral tissues. The sites of lipid deposition thus depend on species and not on the physiological maturity of ducks.
本研究旨在分析物种（麝香鸭和北京鸭）和开始过度喂养时期的年龄对脂肪肝形成、胴体组成以及肝脏和胸肌的脂质和水分含量的影响。我们饲养了每组 40 只的 4 组鸭，每两周开始一次，以便在过度喂养期开始时（10、12、14 和 16 周）有四个不同的年龄。在过度喂养期结束时，所有鸭子都被屠宰。我们的结果证实了在所有年龄段，麝香鸭和北京鸭之间的胴体组成和血浆、肝脏和胸肌脂质含量存在高度差异。北京鸭无法发展出高度的肝脂肪变性，但与麝香鸭相比，外周脂肪和肌肉组织中的脂质储存增加。然而，北京鸭的脂肪肝重量随着年龄的增长而增加，肝脏和外周组织中的脂质沉积增加。麝香鸭产生脂肪肝的能力与年龄无关，肝脏和外周组织中的脂质沉积保持不变。因此，脂质沉积的部位取决于物种，而与鸭子的生理成熟度无关。
