Capture histories for radio-tagged Western Sandpipers at four stopover sites on the Pacific Flyway, 1992 to 2022
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Shorebirds typically spend more time fueling and refueling during migration than they spend in actual flight, and consequently their stopover ecology has important implications for fitness and conservation. We examined spatial variation and long-term changes in stopover duration of radio-tagged western sandpipers Calidris mauri over three decades on the Pacific Coast of North America. Birds were monitored during 10 periods of northward migration at four key stopover regions including: San Francisco Bay, CA; Willapa Bay/Grays Harbor, WA; Vancouver Island/Fraser River Delta, BC; and Copper River Delta, AK. We used CormackâJollyâSeber models to estimate the daily probability of staying at a stopover site (Ï) corrected for daily detection rates (p) in relation to annual and seasonal variation. Daily probabilities of staying were then used to calculate length of stay (LOS) in days. Mean LOS decreased at stopover sites as birds progressed northward and varied from 23.1 days at San Francisco B..., Birds were captured and tagged at 10 different locations (latitude â longitude): Playa Ceuta, Mexico (23.94 -106.98), Bahia Santa Maria, Mexico (25.11 -108.22); Punta Banda, Mexico (31.74 -116.63); Point Mugu, California (34.10 -119.12); three areas of San Francisco Bay, California (37.53 -122.07 , 37.62 -122.12, and 37.49 -121.96), including 10 birds in 1992 at nearby Bolinas Lagoon (37.93, -122.69); Honey Lake, California (40.16 -120.23); Grays Harbor, Washington (46.97 -123.95 and 46.89 -124.05); four coastal sites on Vancouver Island, British Columbia (49.05 -125.71, 49.11 -125.88, 49.07 -125.75, and 49.03 -125.69), and two areas of the Fraser River Estuary, British Columbia (49.22 -123.22, and 49.05 -125.69). All birds were captured with mist nets, banded with an individually numbered metal band, weighed for body mass (± 0.5 g), and measured for three standard morphometric variables (± 1 mm), including exposed culmen, wing (both natural and flattened), and tarsus. Western Sandpiper..., # Capture histories for radio-tagged Western Sandpipers at four stopover sites on the Pacific Flyway, 1992 to 2022 Dataset DOI: [10.5061/dryad.bg79cnpqn](https://doi.org/10.5061/dryad.bg79cnpqn) ## Description of the data and file structure This dataset provides the underlying basis for the scientific paper entitled 'Three Decades of Western Sandpiper Stopover Dynamics during Northward Migration on the Pacific Coast of North America, 1992 to 2022', written by Nils Warnock, Sarah Warnock, Brett Sandercock, Mary Anne Bishop, John Takekawa, Sydney Bliss, Scott Flemming, and Mark Drever. These data provide locations and dates for captured Western Sandpipers that were subsequently detected at four stopover sites on the Pacific Flyway, 1992 to 2022. Data also include capture histories used in CJS (Cormack-Jolly-Seber) modelling as well as morphometric data. ### Files and variables #### File: Warnock_2026_Birds_w_covariates_(April2026).xlsx ##### Variables * stopover_ch_row: unique row..., ,
滨鸟在迁徙过程中用于补给与再次补给的时长，通常远超实际飞行耗时，因此其中途停歇生态学对个体适合度与物种保护均具有重要意义。本研究针对北美太平洋沿岸、历经三十年的无线电标记西滨鹬（Calidris mauri），分析了其中途停歇时长的空间变异与长期变化趋势。研究在10个北迁迁徙期内，于4处关键中途停歇区域对这些鸟类开展了监测，这些区域包括：加利福尼亚州旧金山湾、华盛顿州威拉帕湾/格雷斯港、不列颠哥伦比亚省温哥华岛/弗雷泽河三角洲，以及阿拉斯加州铜河三角洲。 我们采用科马克-乔利-西尔伯（Cormack-Jolly-Seber, CJS）模型，结合年度与季节变异，估算了停歇站点的单日驻留概率（φ），并针对单日检测率（p）进行校正；随后利用单日驻留概率计算驻留时长（length of stay, LOS，单位：天）。随着鸟类向北迁徙，各停歇站点的平均驻留时长逐渐缩短，旧金山湾的平均驻留时长为23.1天，其余站点时长不等[原文截断]。 研究团队在10处不同点位（纬度，经度）捕获并标记西滨鹬：墨西哥塞乌塔滩（23.94, -106.98）、墨西哥圣玛丽亚湾（25.11, -108.22）、墨西哥班达角（31.74, -116.63）、加利福尼亚州穆古角（34.10, -119.12）；加利福尼亚州旧金山湾3处区域（37.53, -122.07、37.62, -122.12及37.49, -121.96），其中1992年在邻近的博利纳斯泻湖（37.93, -122.69）捕获了10只个体；加利福尼亚州哈尼湖（40.16, -120.23）；华盛顿州格雷斯港2处区域（46.97, -123.95与46.89, -124.05）；不列颠哥伦比亚省温哥华岛4处沿海点位（49.05, -125.71、49.11, -125.88、49.07, -125.75及49.03, -125.69）；以及不列颠哥伦比亚省弗雷泽河河口2处区域（49.22, -123.22与49.05, -125.69）。 所有个体均通过雾网捕获，佩戴带有唯一编号的金属脚环，称量体质量（精度±0.5g），并测量3项标准形态学变量（测量精度±1mm）：包括喙峰外露长度、自然翅长与平展翅长，以及跗跖长度。[原文截断] # 1992年至2022年太平洋迁飞路线上4处中途停歇站点的无线电标记西滨鹬捕获历史 ## 数据集DOI：[10.5061/dryad.bg79cnpqn](https://doi.org/10.5061/dryad.bg79cnpqn) ## 数据与文件结构说明 本数据集为题为《1992-2022年北美太平洋沿岸北迁过程中西滨鹬中途停歇动态的三十年研究》的学术论文提供了核心数据支撑，该论文作者为Nils Warnock、Sarah Warnock、Brett Sandercock、Mary Anne Bishop、John Takekawa、Sydney Bliss、Scott Flemming及Mark Drever。 本数据集涵盖1992年至2022年间，在太平洋迁飞路线4处中途停歇站点被检测到的捕获西滨鹬的点位与日期信息，同时包含用于CJS（科马克-乔利-西尔伯）模型建模的捕获历史数据，以及形态学测量数据。 ### 文件与变量 #### 文件：Warnock_2026_Birds_w_covariates_(April2026).xlsx ##### 变量 * stopover_ch_row：唯一行标识[原文截断]
