The macroecology of fish migration

Aim: We still lack a consensus on the main variables driving changes in migratory strategies. Different hypotheses have been proposed: productivity, energy, environmental heterogeneity, and genetic predisposition. This work takes an integrative view and analyzes migrations from a macroecological perspective estimating the extent to which different environmental variables and historic factors influence migratory life histories. Location: Global Time period: Current Major taxa studied: Actinopterygian fishes Methods: Using public domain museum records, global repositories, and global measures of temperature, productivity, precipitation and heterogeneity, we spatially analyzed the distribution of anadromous, catadromous, amphidromous, potamodromous and oceanodromous migratory fish using 1676 species and compared it to 1616 non-migratory fishes. After analyzing the individual roles of productivity and temperature in shaping biodiversity, we conducted path analyses including seve...研究目的：目前学界对于驱动洄游策略演变的核心变量尚未达成共识。已有研究提出了四类假说，分别为生产力、能量供给、环境异质性以及遗传易感性。本研究采用整合研究视角，从宏生态学维度展开洄游现象分析，量化不同环境变量与历史因素对洄游生活史的影响程度。 研究区域：全球范围 时间范围：当前时段 研究类群：辐鳍鱼纲（Actinopterygian fishes）鱼类 研究方法：本研究依托公共领域馆藏标本记录、全球数据库及全球尺度的温度、生产力、降水与环境异质性数据，针对1676种洄游鱼类（涵盖溯河洄游、降海洄游、双洄游、淡水洄游及海洋洄游类群）的空间分布开展分析，并与1616种非洄游鱼类进行对比。在明确生产力与温度对生物多样性形成的独立作用后，本研究开展了包含……的路径分析。