Age-related changes in the distribution of lean, fat with skin and bones in duck carcases
Age-related changes in the distribution of lean, fat with skin and bones in duck carcases
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DOI：
10.1080/00071660500064378
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发表时间：
2005-04-01
影响因子：
2
通讯作者：
Murawska, D
中科院分区：
文献类型：
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作者：
Bochno, R;Brzozowski, W;Murawska, D
1.试验鸡为13周龄北京鸭（352 8和352 9）。它们被随意喂食标准饮食。从第2周开始，每隔7d屠宰公、母各21头。尸体分为颈、翅、腿、胸、背五个部分，然后解剖成瘦肉、带脂肪的皮肤和骨头。1日龄雏鸭体重相近（约62 g），但5周龄时公鸭比母鸭重，13周龄时分别为3537 g和2994 g. 2周龄鸭的瘦肉分布在腿、背、翅、颈、胸各部位分别占55.77%、15.91%、2.78%、12.47%和13.12%。7周龄鸭的瘦肉分布发生了很大的变化。腿的比例下降到29.34%，胸和翅的比例上升到36.86%和10.96%。与年龄相关的皮肤脂肪分布变化较小.翅、腿、背的比例增加，颈、胸的比例降低.直到7周龄，骨骼的百分比在腿部迅速下降，在颈部和胸部增加，与它们在尸体中的总重量相比。
1. The experimental birds were Pekin ducks ( 352 8 and 352 9) reared to the age of 13 weeks. They were fed standard diets ad libitum. Starting from the second week, 21 males and 21 females were slaughtered every 7 d. Their carcases were divided into the following elements: neck, wings, legs, breast and back, which were then dissected into lean, skin with fat and bones.2. The body weights of one- day- old ducklings were similar ( circa 62 g), but at 5 weeks of age the males were heavier than the females, and at 13 weeks of age their body weights were 3537 g and 2994 g, respectively.3. In 2- week- old ducks 55.77% of lean was located in the legs, 15.91% in the back part, 2.78% in the wings, 12.47% in the neck and only 13.12% in the breast.4. Considerable changes in the distribution of lean were noted in the ducks aged 7 weeks. Its percentage decreased in the legs ( to 29.34%) and increased in the breast and wings ( to 36.86% and 10.96%, respectively).5. Age- related changes in the distribution of skin with fat were smaller. Its percentage increased in the wings, legs and back, and decreased in the neck and breast.6. Until the age of 7 weeks the percentage of bones was decreasing quickly in the legs and increasing in the neck and breast, compared with their total weight in the carcase.