Abstract：
This study aimed to assess the fusion of growth plates and the development of secondary ossification centres in the forelimb bones of maned wolves (Chrysocyon brachyurus), contrasting the findings with established data from domestic dogs. Three maned wolves, comprising one male and two females, initially aged between 3 and 4 months, were subjected to monthly radiographic evaluations until 10-11 months of age, followed by bimonthly assessments until 18-19 months of age, encompassing both forelimbs. The closure times of growth plates were observed as follows: supraglenoid tubercle (7-8 months), proximal humerus (17-19 months), distal humerus (8-9 months), medial epicondyle of the humerus (8-9 months), proximal ulna (9-10 months), proximal radius (13-15 months), distal ulna (13-15 months) and distal radius (17-19 months). Statistical analysis revealed significant differences in the areas of secondary ossification centres in the proximal epiphyses of the humerus and radius, respectively, observed from the initial evaluation at 8-9 months and 6-7 months. Conversely, the epiphyses of the supraglenoid tubercle, distal humerus, proximal ulna, distal ulna, medial epicondyle of the humerus and distal radius did not exhibit significant area differences between 3-4 months and 4-5 months, yet notable distinctions emerged at 5-6 months. In summary, while the radiographic appearance of epiphyseal growth plates and secondary ossification centres in maned wolves resembles that of domestic dogs, closure times vary. These findings contribute to understanding the dynamics of epiphyseal growth plates in this species.
摘要：
本研究旨在评估鬃毛狼（Chrysocyonbrachyurus）前肢骨骼中生长板的融合和次级骨化中心的发育，将研究结果与家犬的既定数据进行对比。三只刚毛的狼，包括一名男性和两名女性，最初年龄在3至4个月之间，每月接受射线照相评估，直到10-11个月大，然后是双月评估，直到18-19个月大，包括两个前肢。观察生长板的闭合时间如下：上鞘结节（7-8个月），肱骨近端（17-19个月），肱骨远端（8-9个月），肱骨内侧上髁（8-9个月），尺骨近端（9-10个月），近端桡骨（13-15个月），尺骨远端（13-15个月）和桡骨远端（17-19个月）。统计学分析显示，肱骨近端和桡骨的继发性骨化中心区域存在显著差异，分别,从8-9个月和6-7个月的初始评估中观察到。相反，上软骨结节的骨phy，肱骨远端,尺骨近端,尺骨远端,肱骨内上髁和桡骨远端在3-4个月和4-5个月之间没有表现出显著的面积差异，然而，在5-6个月时出现了明显的区别。总之,虽然有鬃狼的骨phy生长板和次级骨化中心的影像学表现类似于家犬，关闭时间各不相同。这些发现有助于了解该物种骨phy生长板的动力学。
