Tracking movements in an endangered capercaillie population using DNA-tagging

Knowing the location and movements of individuals at various temporal and spatial scales is an important facet of behavior and ecology. In threatened populations, movements that would ensure gene flow and population viability are often challenged by habitat fragmentation. Also in those endangered populations capturing and handling individuals to tag them, or to obtain tissue samples, can present additional challenges. DNA tagging, i.e. non-invasive individual identification of samples, can reveal movement patterns. We used fecal material genetically assigned to individuals to indirectly track movements of a large-bodied, endangered forest bird, Cantabrian capercaillie (Tetrao urogallus cantabricus). We wanted to know how the birds were using the fragmented forest landscape, and whether they showed fidelity to display areas. We used multi-event capture-recapture models to estimate fidelity to display areas among three consecutive mating seasons. We identified 127 individuals, and registe..., , , # Tracking movements in an endangered capercaillie population using DNA-tagging This dataset contains the information on the individual birds identified, and the relative positions of their captures and recaptures. The coordinates have been shifted to a non-geographical reference, although maintaining the original dimensions, to comply with the Spanish guidelines for treatment of information on endangered species. ## Description of the data and file structure \- **all_locations.csv**: this is a comma-separated dataset that contains all locations of individuals (column ***indv***) included in the study. The coordinates (fields ***x_relative*** and ***y_relative***) resulted from shifting the original coordinates to a non-geographical reference, although maintaining the original dimensions, which would allow repeating the spatial treatment of the data. Also included are fields ***year*** (year of the Spring survey) and ***sex***. In the latter males are coded as ***M***, females as *...掌握不同时空尺度下个体的位置与移动特征，是行为与生态学研究的重要方向之一。对于受威胁种群而言，保障基因交流与种群存续的个体移动，往往会受到栖息地破碎化的阻碍。此外，在这类濒危种群中，为个体佩戴标记或获取组织样本而进行的捕获与处理工作，往往还会面临额外的实操障碍。DNA标记技术，即基于样本的非侵入式个体识别（non-invasive individual identification）方法，能够有效揭示物种的移动模式。本研究利用经基因鉴定归属个体的粪便样本，间接追踪一种大型濒危森林鸟类——坎塔布连山松鸡（Cantabrian capercaillie，*Tetrao urogallus cantabricus*）的移动情况。本研究旨在探究该鸟类对破碎化森林景观的利用模式，以及它们是否对求偶场（display areas）表现出栖息忠实性。我们采用多事件捕获-再捕获模型（multi-event capture-recapture models），对连续三个繁殖季内的求偶场栖息忠实性进行了估算。本研究共鉴定出127只个体，并记录…… # 利用DNA标记技术追踪濒危松鸡种群的移动模式 本数据集包含本研究中鉴定出的所有个体鸟类信息，以及其捕获与再捕获位点的相对位置数据。为符合西班牙濒危物种信息处理指导方针，所有坐标已被转换为非地理参考系，但保留了原始空间维度，以便复现数据的空间处理流程。 ## 数据与文件结构说明 - **all_locations.csv**：该逗号分隔数据集包含本研究中所有个体的位点信息（列名为***indv***）。其中坐标字段***x_relative***与***y_relative***是将原始坐标转换为非地理参考系后的结果，保留了原始空间维度，可用于复现数据的空间处理操作。此外还包含字段***year***（春季调查年份）与***sex***（性别）：其中雄性以***M***编码，雌性以……