Movement of juvenile migratory birds from settlement to adulthood across the non-breeding range

Among migratory vertebrates, high levels of fidelity to non-breeding sites during adulthood are common. If occupied sites vary in quality, strong site-fidelity can have profound consequences for individual fitness and population demography. Given the prevalance of adult site-fidelity, the regions of the non-breeding range to which juveniles first migrate, and the scale of any subsequent movements, are likely to be pivotal in shaping distributions and demographic processes across population ranges. However, inherent difficulties in tracking migratory individuals through early life mean that opportunities to quantify juvenile settlement and movements across non-breeding ranges, and the mechanisms involved, are extremely rare.Through long-term, range-wide resightings of hundreds of colour-marked individuals from their first migration to adulthood, and application of state-space models, we quantify levels of juvenile and adult regional-scale movements and distances at different life stages ..., , , # **Movement of juvenile migratory birds from settlement to adulthood across the non-breeding range**

[https://doi.org/10.5061/dryad.p5hqbzkxd](https://doi.org/10.5061/dryad.p5hqbzkxd)

The data consists of resighting histories of individually-marked Black-tailed Godwits (Limosa limosa islandica). Birds were caught as unfledged chicks or adults under license in several countries across the range of the population from 1994 to 2013 and resighted across the range over the same period. Movement probabilities at different ages were modeled in a state-space model. Please refer to the above paper for details on field methods and analyses.

Dataset provides 1) Movement histories of individual birds 2) Coding of regions for the analysis 3) Maximum distances (in km) moved by individuals between key life-history stages and 4) Script for data processing and model fitting. 

Description of the data and file structure: The dataset and analysis script consists of four files. These are numbered 1-4 b...

在迁徙脊椎动物中，成年个体对非繁殖地的高度栖地保真现象十分普遍。若已占据的栖地质量存在差异，较强的栖地保真行为会对个体适合度与种群人口统计学特征产生深远影响。鉴于成年个体栖地保真现象的普遍性，幼鸟首次迁徙抵达的非繁殖分布区范围，以及后续任何移动的规模，都可能在塑造种群整体分布与人口动态过程中发挥关键作用。然而，在早期生命阶段追踪迁徙个体存在固有困难，这使得量化幼鸟在非繁殖分布区的定居与移动模式及其背后机制的研究机会极为稀缺。本研究通过对数百只带彩色标记的个体从首次迁徙至成年阶段的全分布区长期重观察记录，并结合状态空间模型（state-space models），量化了不同生命阶段幼鸟与成鸟的区域尺度移动水平与移动距离……
# **迁徙幼鸟从定居至成年阶段在非繁殖分布区的移动模式**
https://doi.org/10.5061/dryad.p5hqbzkxd

本数据集包含个体标记的黑尾塍鹬（Black-tailed Godwit，学名：Limosa limosa islandica）的重观察历史记录。1994年至2013年间，研究人员在该种群分布范围内的多个国家，通过许可方式捕获未离巢的雏鸟或成鸟，并在同期于整个分布区内对其进行重观察记录。研究人员基于状态空间模型对不同年龄阶段的移动概率进行了建模。野外研究方法与分析细节请参阅上述论文。

本数据集包含以下4部分内容：1）个体鸟类的移动历史记录；2）用于分析的区域编码文件；3）个体在关键生命史阶段间的最大移动距离（单位：千米）；4）数据处理与模型拟合的脚本文件。

数据与文件结构说明：本数据集及分析脚本共包含4个文件，编号为1至4……