科布和罗斯肉鸡品种运动问题及其经济影响的比较

J. A. Villagómez-Cortés, Blanca Leydi Guevara-Torres, Luis Antonio Landín-Grandvallet, Alberto Tirado-Madrid
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引用次数: 0

摘要

肉鸡商业品系由于强烈的遗传选择和对额外胸肌的改善营养而导致的体重快速增加和肌肉快速生长影响着鸡的健康。为了比较Cobb和Ross品种肉鸡的主要动力问题,使用了墨西哥韦拉克鲁斯州一个商业农场的两个猪圈。第一栏Cobb系雄鼠16,500只,雌鼠16,500只;第二栏Ross系雄鼠16,500只,雌鼠16,500只。小鸡从第一天起直到出售前,都要检查它们的移动问题。记录有问题的动物,并进行尸检以确定病理。在1406只有机车问题的动物中,Cobb占58.9%,Ross占41.1% (P <0.05)。科布和罗斯的机车故障频率分别为2.51%和1.75%。最常见的个体病变是骨软骨病(38.61%)、带脓性内容物的关节炎症(37.13%)和外翻(19.65%)。火车头的问题从第一周开始就出现了,但随着鸟类体重的增加,尤其是从第四周开始,火车头的问题越来越多。问题发生在雄性比雌性多,科布鸟比罗斯鸟多。由于运动问题造成的经济损失对科布品系来说更高。
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Comparison of locomotion problems and its economic impact on Cobb and Ross broiler strains
The rapid weight gain and fast muscle growth due to intense genetic selection and improved nutrition for additional breast muscle in broiler commercial strains affect chickens health. In order to compare the main locomotive problems in broilers of Cobb and Ross strains, two pens from a commercial farm in Veracruz, Mexico were used. The first pen housed 16,500 males and 16,500 females of Cobb strain and the second one 16,500 males and 16,500 females of Ross strain. Chicks were checked for locomotion problems from day one until their sale. Animals with problems were recorded and necropsies were performed to identify the pathology. Out of 1406 animals with locomotive problems (2.13% of the total), 58.9% were Cobb and 41.1% Ross (P <0.05). The frequency of locomotive problems was 2.51% for Cobb and 1.75% for Ross. Most common individual lesions were osteochondrosis (38.61%), inflamed joints with purulent contents (37.13%), and valgus (19.65%). Locomotive problems appeared since the first week, but its number increased as birds gained weight, particularly from the fourth week on. Problems occurred more in males than in females and in Cobb birds than in the Ross strain. Economic loss due to locomotion problems was higher for the Cobb strain.
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