Factors including human dispersal, climate change and varied environmental stressors are altering fish species distributions. Range expansions are producing new records of freshwater species which were rare or previously absent from regional jurisdictions (states, provinces and territories). Simultaneously, species are facing declines and local extirpations in some areas of their distribution. The Resist-Accept-Direct (RAD) framework can provide guiding principles for how declining, newly arrived, or range expanding freshwater fishes should be managed and how range-wide trends can be considered in local management and conservation decisions. We examine the principles of the framework and provide an example decision tree which is applied to examples ranging from resisting the establishment of potentially harmful non-native fishes, to accepting and providing refuge to those species threatened in other parts of their ranges, to directing the migration of fishes which improve ecosystem services. Applying this framework may improve coordination between agencies aiming to improve the resilience of freshwater ecosystems.

中文翻译：

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开发一个抵抗-接受-直接 (RAD) 框架来管理淡水鱼类物种进出政治管辖区

人类扩散、气候变化和各种环境压力等因素正在改变鱼类的分布。范围扩大正在产生淡水物种的新记录，这些淡水物种在区域管辖区（州、省和地区）中很少见或以前不存在。同时，物种在其分布的某些区域面临衰退和局部灭绝。Resist-Accept-Direct (RAD) 框架可以提供指导原则，说明应如何管理数量下降、新到达或范围扩大的淡水鱼类，以及如何在当地管理和保护决策中考虑范围范围内的趋势。我们检查了框架的原理，并提供了一个示例决策树，该决策树应用于从抵抗建立可能有害的非本地鱼类，接受并为那些在其范围内其他部分受到威胁的物种提供避难所，引导鱼类迁徙以改善生态系统服务。应用该框架可以改善旨在提高淡水生态系统复原力的机构之间的协调。