Spatiotemporal variation in marine mammal antipredator behaviors resulting from a predation pinch point

Predator-prey relationships are fundamental aspects of ecological systems that determine the behavior and distribution of animals across time and space. Variation in predation risk can be used to explore when and why individuals perform antipredator behaviors. In marine environments, it is difficult to observe predation and antipredator behaviors. Fortunately, biologgers have long been used to study the distribution and dive behaviors of northern elephant seals (Mirounga angustirostris) on their twice-yearly foraging trips. Here, we analyzed the horizontal and vertical movements of 353 adult female seals across 17 years to investigate how they move through a “predation pinch point” - an area where predators and prey co-occur due to habitat features. Specifically, we explored the diel timing of departure from and arrival to the colony and spatial concentrations in benthic diving (diving close to/along the seafloor). Benthic diving and temporal concentrations in movement to and from the c..., , # Data from: Spatiotemporal variation in marine mammal antipredator behaviors resulting from a predation pinch point Dataset DOI: [10.5061/dryad.mkkwh71bh](10.5061/dryad.mkkwh71bh) Publication DOI: [https://doi.org/10.1002/ece3.72841](https://doi.org/10.1002/ece3.72841) ## Description of the data and file structure ### Summary This repository contains the code used to create figures in [Hale et al., 2026](https://onlinelibrary.wiley.com/doi/10.1002/ece3.72841) The script 'FiguresForMS_11_21_2025_RSB.qmd\" contains the tools/functions necessary to recreate the figures in the associated manuscript. Preliminary steps [in 'data_wrangling_RSB_2025_10_29.qmd'] are required to ensure that the data is processed correctly and that bathymetry and predator data are included. ## Files and variables ### Data File Details #### Details for: TV4_DiveStatType_CMH_2025_07_14.txt Description: a .txt file containing raw data that was processed for analysis. This file can be opened in any plain te...,捕食者-猎物关系是生态系统的核心组成部分，决定了动物在时空维度上的行为与分布格局。捕食风险的变化可用于探究动物个体实施反捕食行为的时机与动因。在海洋环境中，直接观测捕食与反捕食行为颇具难度。所幸生物记录器（biologgers）长期被用于研究北方象海豹（*Mirounga angustirostris*）在每年两次觅食迁徙过程中的分布与潜水行为。本研究对17年间353头成年雌性象海豹的水平与垂直移动数据进行分析，以探究它们如何穿越“捕食瓶颈点”——即因栖息地特征导致捕食者与猎物共同聚集的区域。具体而言，本研究考察了象海豹离开与返回繁殖群的昼夜时间节律，以及底栖潜水（即贴近/沿海底进行的潜水）的空间聚集特征。底栖潜水以及往返该区域的移动时间聚集特征…… # 数据来源：《捕食瓶颈点驱动的海洋哺乳动物反捕食行为时空变化》 数据集DOI：10.5061/dryad.mkkwh71bh 发表论文DOI：https://doi.org/10.1002/ece3.72841 ## 数据与文件结构说明 ### 摘要 本仓库包含用于复现[Hale等人，2026]（https://onlinelibrary.wiley.com/doi/10.1002/ece3.72841）中图表的代码。 脚本`FiguresForMS_11_21_2025_RSB.qmd`包含了复现相关论文中图表所需的工具与函数。 需先完成`data_wrangling_RSB_2025_10_29.qmd`中的预处理步骤，以确保数据得到正确处理，并纳入水深地形与捕食者数据。 ### 文件与变量说明 #### 数据文件详情 ##### 文件详情：TV4_DiveStatType_CMH_2025_07_14.txt 描述：该.txt文件包含经处理用于分析的原始数据，可通过任意纯文本编辑器打开……