Satellite tracking of Common murres (Uria aalge) in the northern California Current System, 2015-2017

Common murres are an abundant marine predator in the California Current System yet knowledge gaps exist in colony-associated movements, habitat-use of non-breeding individuals, and post-breeding season movements. We captured 24 common murres at sea, immediately adjacent to Yaquina Head, the largest murre colony in Oregon, USA. Murres were captured in May of 2015-2017 and in August of 2016 and 2017. Murres were fitted with 17 g battery-powered Platform Terminal Transmitters (PTTs; Telonics Inc.) in 2015 and 5 g solar-rechargeable PTTs (Microwave Telemetry Inc.) in the latter years. The data files show raw Argos tracking data with a low-pass filter applied as well as improved processed locations derived from fitting a state-space model. In addition, we present dive data collected and processed (number of dives and mean dive durations per hour) during 2015 only. We assessed the first and last 3 days of tracks (both in daily distance traveled and number of dives) for anomalous activity, and if present, excluded these portions of each track from the dataset. The deployment data file contains morphological information of tagged birds.

普通海鸦（Common Murre）是加利福尼亚流系（California Current System）中数量丰富的海洋捕食者，但目前仍存在多项认知空白：集群相关移动模式、非繁殖个体的栖息地利用，以及繁殖季后期的移动行为均有待深入研究。我们于紧邻美国俄勒冈州规模最大的海鸦集群地亚奎纳角（Yaquina Head）的海域捕获了24只普通海鸦，捕获工作分别于2015至2017年的5月，以及2016、2017年的8月开展。2015年，我们为受试海鸦佩戴了17克电池驱动型平台终端发射机（Platform Terminal Transmitters，PTT；Telonics Inc.）；后续年份则使用了5克太阳能充电型PTT（Microwave Telemetry Inc.）。本次公开的数据文件包含两类数据集：一是经过低通滤波处理的原始阿尔戈斯（Argos）跟踪数据，二是通过拟合状态空间模型（state-space model）得到的优化定位结果。此外，我们仅提供2015年采集并处理后的潜水数据，内容涵盖每小时的潜水次数与平均潜水时长。我们对每条跟踪轨迹的首尾3天数据（包含每日行进距离与潜水次数）开展了异常活动排查，若存在异常记录则将该时段的轨迹数据从本数据集内剔除。部署信息文件中收录了佩戴标记的受试海鸦的形态学相关参数。