Despite aquatic invasive species (AIS) being a widely recognized threat to native biodiversity in streams on subtropical and tropical oceanic islands across the Pacific, AIS management has been constrained by concerns that methods of removal could result in more harm than good. In this study, we assessed the effectiveness and outcomes of combining hand-netting and streamside sequestration of native species with AIS removal via three-pass electrofishing tailored for Hawaiian Island watersheds. Removals were conducted in 13 watersheds on the island of O‘ahu following a before-after, control-impact design to assess how AIS removal and post-removal community reassembly varied by surface flow and target species of interest. We found that removals resulted in a sharp reduction in AIS densities without altering native species densities. Removal efficacy was greatest in streams with intermediate mean discharge irrespective of target group or pre-removal AIS densities. Long-term monitoring demonstrated that removals led to persistent shifts in community composition reflecting sustained reductions in AIS densities. These findings indicate that electrofishing can be a valuable tool for AIS management in Hawaiian and other subtropical Pacific island streams, so long as steps are taken to minimize potential harm to at-risk and culturally important native species.

尽管水生入侵物种（AIS）是对整个太平洋亚热带和热带海洋岛屿上的河流中的原生生物多样性的广泛认可的威胁，但由于担心清除方法可能带来的弊大于利，AIS的管理受到了限制。在这项研究中，我们评估了针对夏威夷岛流域量身定制的通过三步电钓鱼将手部网和河边隔离与AIS去除相结合的有效性和结果。在进行了前后碰撞控制设计之后，在瓦胡岛的13个集水区进行了清除工作，以评估AIS清除和清除后群落的重新组装如何随地表水流和目标物种的变化而变化。我们发现，清除操作会导致AIS密度急剧下降，而不会改变本地物种的密度。无论目标组或去除前的AIS密度如何，在中等平均排放量的溪流中去除效果最大。长期监测表明，搬迁导致社区组成的持续变化，反映出AIS密度的持续下降。这些发现表明，只要采取措施最大程度地减少对处于危险中和具有文化重要意义的本地物种的潜在危害，电捕鱼就可以成为夏威夷和其他亚热带太平洋岛屿河流中进行AIS管理的有价值的工具。