Northwestern Hawaiian Islands Monk Seal Translocation 2007 – 2019

This dataset includes Argos satellite telemetry and/or GPS satellite locations for 57 Hawaiian monk seals throughout the Northwestern Hawaiian Islands (NWHI; Nihoa Island, Mokumanamana Island, French Frigate Shoals, Laysan Island, Lisianski Island, Pearl and Hermes Reef, Midway Atoll, Kure Atoll). Seals were instrumented as part of translocation activities within the NWHI. Given site-specific variation in threats and vital rates among NWHI sites, translocation has been used as a conservation tool by moving seals from areas of poor survival to areas with improved survival probabilities. Seals in this dataset include those that were translocated, as well as animal serving as non-translocated controls. Seals were instrumented in association with field camps or research cruises in the NWHI from 2007 – 2019. Here we provide a Master Deployment Log table with details about each deployment on each seal (across all datasets), as well as dataset-specific Deployment Logs and Location Tables with location data for each seal. These data have been post-processed to remove poor-quality locations (Location quality code Z from Argos satellites, locations based on <5 GPS satellites, or points indicating impossible movement speeds or angles removed using the argos filter routine in R).

本数据集包含西北夏威夷群岛（Northwestern Hawaiian Islands，简称NWHI）范围内57只夏威夷僧海豹的Argos卫星遥测数据与/或GPS卫星定位数据，覆盖区域包括尼霍阿岛、莫库马纳马纳岛、法国护卫舰浅滩、莱桑岛、利西亚斯基岛、珀尔和赫米斯礁、中途环礁及库雷环礁。这些海豹的卫星标记工作是西北夏威夷群岛内易地转移保护行动的组成部分。鉴于西北夏威夷群岛各区域的威胁类型与种群生命率（vital rates）存在位点特异性差异，易地转移已被用作种群保护手段：将海豹从存活率较低的栖息地转移至存活率更高的区域。本数据集收录的海豹既包括完成易地转移的个体，也包括未进行易地转移的对照个体。2007年至2019年间，研究人员依托野外营地或科研航次，在西北夏威夷群岛范围内为这些海豹安装了卫星标记装置。本次发布包含一份主部署日志表，详细记录了每只海豹的每一次标记部署情况（覆盖所有数据集），同时还提供了针对各数据集的专属部署日志表与定位数据表，其中包含每只海豹的定位数据。上述数据已经过后处理：通过R语言中的Argos滤波程序（argos filter）移除了低质量定位数据，具体包括Argos卫星定位质量代码为Z的数据、基于不足5颗GPS卫星的定位结果，以及经判断存在不合理移动速度或角度的点位。