Ayuso Dolores, González Ana, Peña Francisco, Izquierdo Mercedes
Departament of Animal Production, Centro de Investigaciones Científicas y Tecnológicas de Extremadura/CICYTEX, Ctra. A-V, Km 372, 06187 Guadajira, Badajoz, Spain.
Department of Animal Production, University of Córdoba, Campus Rabanales, Ctra. Madrid, Km 496, 14071 Córdoba, Andalusia, Spain.
An Acad Bras Cienc. 2018 Jan-Mar;90(1):247-253. doi: 10.1590/0001-3765201820150567.
Twenty-four Iberian castrated male pigs were used to characterize and evaluate the effect of the duration of "Montanera" in the adipocytes size and its relation with the backfat thickness and intramuscular fat. The animals were fed under extensive conditions during 30, 60 and 90 days in the "Dehesa" before slaughtered. Carcass weight, percentage of intramuscular fat, thickness of backfat and its three layers and adipocytes size of the intramuscular fat were obtained. The group which expended 90 days on fattening obtained the highest adipocytes, with an area higher by a 50% than those that only expended 30 days. The differences in diameter and perimeter adipocyte were not as marked as area. A significant positive correlation between the diameter, area and perimeter of adipocyte with the backfat thickness were found. The fat cells in Iberian pig hypertrophy during the "montanera stage", being this increase significant from month to month in this period of fattening. Also, this adipocyte increase is correlated with the animal weight. The correlation between adipocyte size and inner layer of backfat shows that the inner layer obtained in live pig by ultrasound techniques could be a good marker of fat infiltration in pigs fattening in "montanera" system.
选用24头伊比利亚去势公猪来表征和评估“蒙塔内拉”育肥期长短对脂肪细胞大小的影响及其与背膘厚度和肌内脂肪的关系。在屠宰前，这些动物在“德埃萨”地区进行了30天、60天和90天的粗放式饲养。测定了胴体重、肌内脂肪百分比、背膘厚度及其三层结构以及肌内脂肪的脂肪细胞大小。育肥90天的组获得了最大的脂肪细胞，其面积比仅育肥30天的组高50%。脂肪细胞直径和周长的差异不如面积明显。发现脂肪细胞的直径、面积和周长与背膘厚度之间存在显著正相关。伊比利亚猪的脂肪细胞在“蒙塔内拉阶段”肥大，在此育肥期内每月都有显著增加。此外，这种脂肪细胞的增加与动物体重相关。脂肪细胞大小与背膘内层之间的相关性表明，通过超声技术在生猪中获得的背膘内层可能是“蒙塔内拉”系统育肥猪脂肪浸润的良好指标。
