PDF(Pubmed)
Abstract：
The bearded vulture (Gypaetus barbatus) is an endangered species with a specialist osteophagous (bone) diet. We estimated the survival and productivity of this vulture in the Aragonese Pyrenees, where the main population of the species in Europe is found. We used a database covering a period of 33 years (1987-2020). To estimate the probability of survival, we used Cormack-Jolly-Seber models with a Bayesian approach. Our models estimated a survival rate of 0.90 ± 0.08 in juveniles, 0.95 ± 0.04 in subadults and 0.92 ± 0.05 in adults. The survival probability increased over the study period in adults and subadults but not in juveniles. By contrast, productivity decreased over the same period. Our study provides updated information on the status of two demographic parameters of great importance to the species and allows us to identify the most vulnerable age classes and to plan conservation actions to improve the situation of the species in a territory that is a donor of specimens for reintroduction projects. The estimated survival values suggest that more caution should be exercised when planning these feeding points according to the use the species makes of them.
摘要：
胡须秃鹰（Gypaetusbarbatus）是一种濒危物种，具有专门的食骨（骨）饮食。我们估计了这种秃鹰在阿拉贡比利牛斯山脉的生存和生产力，在欧洲发现了该物种的主要种群。我们使用了一个涵盖33年(1987-2020年)的数据库。为了估计生存的可能性，我们用贝叶斯方法使用Cormack-Jolly-Seber模型。我们的模型估计青少年的存活率为0.90±0.08，亚成人为0.95±0.04，成人为0.92±0.05。在研究期间，成年人和亚成年人的生存概率增加，而青少年则没有。相比之下,同期生产率下降。我们的研究提供了有关对该物种非常重要的两个人口统计学参数的状态的最新信息，并使我们能够确定最脆弱的年龄段，并计划保护行动以改善该物种在该地区的状况。重新引入项目的标本。估计的生存值表明，在根据物种的使用情况计划这些喂食点时，应更加谨慎。
