University of California Santa Cruz, Department of Ecology and Evolutionary Biology, Santa Cruz, CA 95060, USA.
University of Alberta, Department of Biological Sciences, Edmonton T6G 2E9, Canada.
Trends Ecol Evol. 2021 Aug;36(8):737-749. doi: 10.1016/j.tree.2021.04.010. Epub 2021 May 13.
Migratory prey experience spatially variable predation across their life cycle. They face unique challenges in navigating this predation landscape, which affects their perception of risk, antipredator responses, and resulting mortality. Variable and unfamiliar predator cues during migration can limit accurate perception of risk and migrants often rely on social information and learning to compensate. The energetic demands of migration constrain antipredator responses, often through context-dependent patterns. While migration can increase mortality, migrants employ diverse strategies to balance risks and rewards, including life history and antipredator responses. Humans interact frequently with migratory prey across space and alter both mortality risk and antipredator responses, which can scale up to affect migratory populations and should be considered in conservation and management.
迁徙性猎物在其生命周期中会经历空间变化的捕食。它们在穿越这个捕食景观时面临着独特的挑战,这会影响它们对风险的感知、防御反应和最终的死亡率。迁徙过程中可变的和不熟悉的捕食者线索会限制对风险的准确感知,而迁徙者通常依赖于社会信息和学习来进行补偿。迁徙的能量需求会通过上下文相关的模式来限制防御反应。虽然迁徙可能会增加死亡率,但迁徙者会采用多种策略来平衡风险和回报,包括生活史和防御反应。人类在空间上经常与迁徙性猎物相互作用,并改变死亡率风险和防御反应,这可能会影响迁徙种群,因此应该在保护和管理中加以考虑。