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Joint estimation of growth and survival from mark‐recapture data to improve estimates of senescence in wild populations
Ecology ( IF 4.8 ) Pub Date : 2019-12-26 , DOI: 10.1002/ecy.2877
Beth A Reinke 1 , Luke Hoekstra 2 , Anne M Bronikowski 2 , Fredric J Janzen 2 , David Miller 1
Affiliation  

Understanding age-dependent patterns of survival is fundamental to predicting population dynamics, understanding selective pressures, and estimating rates of senescence. However, quantifying age-specific survival in wild populations poses significant logistical and statistical challenges. Recent work has helped to alleviate these constraints by demonstrating that age-specific survival can be estimated using mark-recapture data even when age is unknown for all or some individuals. However, previous approaches do not incorporate auxiliary information that can improve age estimates of individuals. We introduce a survival estimator that combines a von Bertalanffy growth model, age-specific hazard functions, and a Cormack-Jolly-Seber mark-recapture model into a single hierarchical framework. This approach allows us to obtain information about age and its uncertainty based on size and growth for individuals of unknown age when estimating age-specific survival. Using both simulated and real-world data for two painted turtle (Chrysemys picta) populations, we demonstrate that this additional information substantially reduces the bias of age-specific hazard rates, which allows for the testing of hypotheses related to aging. Estimating patterns of senescence is just one practical application of jointly estimating survival and growth; other applications include obtaining better estimates of the timing of recruitment and improved understanding of life-history trade-offs between growth and survival.

中文翻译:

从标记重新捕获数据联合估计生长和存活,以改进对野生种群衰老的估计

了解年龄相关的生存模式对于预测人口动态、了解选择压力和估计衰老率至关重要。然而,量化野生种群中特定年龄的存活率带来了重大的后勤和统计挑战。最近的工作通过证明即使在所有人或某些人的年龄未知的情况下也可以使用标记重新捕获数据来估计特定年龄的存活率,从而有助于缓解这些限制。然而,以前的方法没有包含可以改善个人年龄估计的辅助信息。我们引入了一个生存估计器,它将 von Bertalanffy 增长模型、特定年龄的风险函数和 Cormack-Jolly-Seber 标记重新捕获模型结合到一个单一的层次框架中。这种方法使我们能够在估计特定年龄生存率时,根据未知年龄个体的大小和生长情况,获取有关年龄及其不确定性的信息。我们使用两个锦龟 (Chrysemys picta) 种群的模拟和真实数据,证明这些额外信息大大降低了特定年龄风险率的偏差,从而可以测试与衰老相关的假设。估计衰老模式只是联合估计生存和生长的一种实际应用;其他应用包括更好地估计招募时间以及更好地了解生长和生存之间的生活史权衡。我们使用两个锦龟 (Chrysemys picta) 种群的模拟和真实数据,证明这些额外信息大大降低了特定年龄风险率的偏差,从而可以测试与衰老相关的假设。估计衰老模式只是联合估计生存和生长的一种实际应用;其他应用包括更好地估计招募时间以及更好地了解生长和生存之间的生活史权衡。我们使用两个锦龟 (Chrysemys picta) 种群的模拟和真实数据,证明这些额外信息大大降低了特定年龄风险率的偏差,从而可以测试与衰老相关的假设。估计衰老模式只是联合估计生存和生长的一种实际应用;其他应用包括更好地估计招募时间以及更好地了解生长和生存之间的生活史权衡。估计衰老模式只是联合估计生存和生长的一种实际应用;其他应用包括更好地估计招募时间以及更好地了解生长和生存之间的生活史权衡。估计衰老模式只是联合估计生存和生长的一种实际应用;其他应用包括更好地估计招募时间以及更好地了解生长和生存之间的生活史权衡。
更新日期:2019-12-26
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