The influence of climate on the timing of large-scale animal migrations is a major ecological and resource management concern. Anadromous fish migrations can have broad scale impacts on human communities and marine, aquatic and terrestrial food webs. However, isolating the effects of climate change on the timing of life stage transitions for anadromous fish species is challenging. Striped bass (Morone saxatilis) exhibit striking variation in migration patterns within their natural range, including migratory behaviors that change with latitude, and climate-induced temperature changes are predicted to drive future habitat and distribution changes. Here we explore the linkages between migration and multiple components of coastal and inland aquatic ecosystems impacted by climate change. By leveraging environmental and fisheries monitoring which began in 1969, we describe the upstream migration timing of non-native adult Striped bass influenced by estuary outflow and sea surface temperature in the San Francisco Bay-Delta, California. Striped bass migrated later in years when Delta outflow was greater and sea surface temperature was cooler. It is likely that temperature thresholds in the ocean during the springtime provide a cue for Striped bass to initiate migration, but sea surface temperature may also represent composite climatic trends influencing Striped bass. Further, the observed variation in migration timing of adult Striped bass has implications for predation risk on the seaward-migration of juvenile Chinook salmon.

气候对大规模动物迁徙时间的影响是一个主要的生态和资源管理问题。溯河鱼类洄游会对人类社区以及海洋、水生和陆地食物网产生广泛的影响。然而，隔离气候变化对溯河鱼类生命阶段转变时间的影响具有挑战性。条纹鲈鱼（Morone saxatilis) 在其自然范围内表现出显着的迁移模式变化，包括随纬度变化的迁移行为，预计气候引起的温度变化将推动未来的栖息地和分布变化。在这里，我们探讨了迁移与受气候变化影响的沿海和内陆水生生态系统的多个组成部分之间的联系。通过利用 1969 年开始的环境和渔业监测，我们描述了受加利福尼亚州旧金山湾三角洲河口外流和海面温度影响的非本地成年条纹鲈鱼的上游迁徙时间。条纹鲈鱼在三角洲流出量较大且海面温度较低的年份晚些时候迁徙。春季海洋中的温度阈值很可能为条纹鲈鱼开始迁徙提供了线索，但海面温度也可能代表影响条纹鲈鱼的复合气候趋势。此外，观察到的成年条纹鲈鱼迁移时间的变化对幼年奇努克鲑鱼向海迁移的捕食风险有影响。