TOPPWS

This is the OBIS extraction of the Ocean Tracking Network and Department of Fisheries and Oceans Canada (DFO) TOPPWS, consisting of the release tagging metadata, i.e. the location and date when the tagged animal was released, and summarized detection events of tagged individuals.
If readers are interested in the source dataset they may also inquire with the project PIs as listed here or on the OTN web site (https://members.oceantrack.org/project?ccode=NEP.TOPPWS).
Abstract:Gaining insights into seasonal aggregations of marine megafauna and how patterns vary among demographic groups is pivotal for modeling populations and ecosystem dynamics and evaluating anthropogenic risk exposure. In California, adult and sub-adult white sharks recurrently aggregate on the central coast in fall and winter months, while juveniles are thought to remain present in southern aggregations year-round. However, understanding of movements outside of known aggregation sites, transitions in patterns between ontogenetic groups, and drivers of presence at coastal sites is limited. Using a long-term acoustic tagging program (established in 2006) in Central California, our project focuses on unraveling the coastal movement patterns of white sharks spanning juvenile to adult size ranges. Our expanded receiver array covers both historical aggregation sites and additional locations along the Central California coast, providing a finer-scale investigation into shark movements.

本数据集为海洋跟踪网络（Ocean Tracking Network, OTN）与加拿大渔业与海洋部（Department of Fisheries and Oceans Canada, DFO）TOPPWS项目的海洋生物地理信息系统（Ocean Biogeographic Information System, OBIS）提取数据集，包含标记放流元数据——即标记个体的放流位置与放流日期——以及标记个体的检测事件汇总数据。
若读者对原始数据集感兴趣，可联系本文所列或海洋跟踪网络官网（https://members.oceantrack.org/project?ccode=NEP.TOPPWS）上公示的项目首席研究员（Principal Investigators, PIs）咨询。
摘要：解析海洋巨型动物的季节性聚集规律，以及不同种群群组间的模式差异，对于种群与生态系统动力学建模、评估人为风险暴露水平至关重要。在加利福尼亚海域，成年及亚成年大白鲨会于每年秋季与冬季周期性聚集于中部海岸，而幼年个体被认为全年栖息于南部聚集区域。然而，目前学界对已知聚集区外的大白鲨移动模式、不同发育阶段群组间的行为模式转变，以及海岸区域栖息行为的驱动因素仍缺乏深入认知。依托2006年在加利福尼亚中部启动的长期声学标记项目，本研究聚焦解析涵盖幼年至成年体型范围的大白鲨沿海移动模式。本研究扩展后的接收器阵列覆盖了历史聚集区与加利福尼亚中部海岸沿线的新增监测点位，可为大白鲨移动模式研究提供更高分辨率的精细化分析支撑。