Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague-Suchdol, Czech Republic.
Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague-Suchdol, Czech Republic.
Meat Sci. 2017 Nov;133:51-55. doi: 10.1016/j.meatsci.2017.06.003. Epub 2017 Jun 8.
The age at which final nutria weight is achieved varies in literature between six and 14months. The aim of this study was to evaluate the growth, carcass composition and meat quality of male and female nutrias between the ages of six and eight months in intensive production system. Sexual dimorphism in growth was observed from three months of age, and in females, growth considerably decreased after six months of age. The dressing-out percentage and the meat color were not affected by the age or sex of nutrias. Dry matter, ether extract and energetic values were significantly higher in females and in older nutrias. The decreasing frequency of type IIA fibers in older nutrias was presumably associated with a conversion of type IIA fibers to type IIB fibers. Nutrias under intensive production system can be slaughtered at six months of age when they reach a high carcass yield and meat quality.
文献中报道，最后达到的海狸鼠体重的年龄在 6 到 14 个月之间变化。本研究的目的是评估在密集生产系统中 6 至 8 月龄雄性和雌性海狸鼠的生长、胴体组成和肉质。从 3 个月大开始观察到生长的性别二态性，而在雌性中，6 个月后生长显著下降。海狸鼠的去毛率和肉色不受年龄或性别的影响。干物质、乙醚提取物和能量值在雌性和年龄较大的海狸鼠中显著更高。随着年龄的增长，ⅡA型纤维的减少频率可能与ⅡA型纤维向ⅡB 型纤维的转化有关。在密集生产系统下，当海狸鼠达到高胴体产量和肉质时，可以在 6 个月大时进行屠宰。
