Understanding spatiotemporally varying animal distributions can inform ecological understanding of species' behavior (e.g., foraging and predator/prey interactions) and support development of management and conservation measures. Data from an array of echolocation-click detectors (C-PODs) were analyzed using Bayesian spatiotemporal modeling to investigate spatial and temporal variation in occurrence and foraging activity of harbor porpoises (Phocoena phocoena) and how this variation was influenced by daylight and presence of bottlenose dolphins (Tursiops truncatus). The probability of occurrence of porpoises was highest on an offshore sandbank, where the proportion of detections with foraging clicks was relatively low. The porpoises' overall distribution shifted throughout the summer and autumn, likely influenced by seasonal prey availability. Probability of porpoise occurrence was lowest in areas close to the coast, where dolphin detections were highest and declined prior to dolphin detection, leading potentially to avoidance of spatiotemporal overlap between porpoises and dolphins. Increased understanding of porpoises' seasonal distribution, key foraging areas, and their relationship with competitors can shed light on management options and potential interactions with offshore industries.

中文翻译：

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港湾海豚分布和在恐惧景观中觅食的时空变化

了解时空变化的动物分布可以告知对物种行为（例如觅食和捕食者/猎物相互作用）的生态理解，并支持管理和保护措施的发展。使用贝叶斯时空模型分析来自回声定位点击探测器 (C-POD) 阵列的数据，以研究港湾鼠海豚 ( Phocoena phocoena ) 发生和觅食活动的空间和时间变化，以及这种变化如何受到日光和宽吻海豚存在的影响海豚 ( Tursiops truncatus )）。江豚出现的概率在近海沙洲最高，其中觅食点击的检测比例相对较低。海豚的整体分布在整个夏季和秋季发生了变化，可能受到季节性猎物可用性的影响。在靠近海岸的地区，海豚出现的概率最低，海豚的检测率最高，并且在海豚检测之前下降，从而有可能避免海豚和海豚之间的时空重叠。对海豚的季节性分布、主要觅食区及其与竞争对手的关系的更多了解可以揭示管理选择和与近海工业的潜在互动。