Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706, USA.
Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin 53706, USA,
J Zoo Wildl Med. 2019 Sep;50(3):731-734. doi: 10.1638/2018-0186.
Juvenile whooping cranes () raised for wild release were found to have an increased incidence of rib fractures at fledging in 2017 compared with the previous 16 years. Serum analysis showed 30-day-old juveniles in 2017 ( = 12) had significantly lower 25-hydroxyvitamin D3 and significantly higher parathyroid hormone concentrations than juveniles in 2010 ( = 6) with no history of rib fractures. Increased serum parathyroid hormone concentrations in the 2017 juveniles persisted to fledging age. Review of dietary and environmental management revealed that juveniles in 2017 were provided a commercial diet with a lower, and perhaps suboptimal, calcium:phosphorus ratio and experienced reduced time outdoors in the first month after hatch, presumably resulting in less ultraviolet B radiation exposure. Mild hyperparathyroidism in precocial whooping cranes may result when dietary constraints and/or outdoor access is compromised and manifest as rib fractures in the absence of traumatic injury.
2017 年，放飞的幼年小鹤（）肋骨骨折的发生率高于前 16 年。血清分析显示，2017 年 30 日龄的幼鹤（n=12）血清 25-羟维生素 D3 浓度显著低于 2010 年无肋骨骨折史的幼鹤（n=6），而甲状旁腺激素浓度显著升高。2017 年幼鹤的甲状旁腺激素浓度持续升高至放飞年龄。对饮食和环境管理的回顾表明，2017 年的幼鹤提供了一种商业饮食，钙：磷比例较低，可能不够理想，并且在孵化后第一个月户外活动时间减少，可能导致紫外线 B 辐射暴露减少。当饮食受到限制和/或户外活动受到限制时，早成性小鹤可能会出现轻度甲状旁腺功能亢进，表现为肋骨骨折，而无创伤性损伤。
