The sea lamprey (Petromyzon marinus) is an invasive species in the Laurentian Great Lakes which requires control to protect valuable fisheries. The Sea Lamprey Control Program (program) uses chemical methods (lampricides) each year to treat infested streams, but limited resources only allow control agents to target 100–125 streams annually. To provide the most cost-effective use of these resources, the program began using the Empiric Stream Treatment Ranking (ESTR) system in 2000 as a decision support tool for selecting streams for treatment. Following a comprehensive review of larval assessment techniques in 2002, the program transitioned from a labor-intensive quantitative technique to a more rapid catch-per-unit-effort based approach. Staff resources were re-allocated to lampricide control, allowing for treatment of more streams annually. Beginning in 2009, stream selection shifted to cost-per-kill of large larvae (>100 mm) and incorporated expert opinion along with targeted treatment strategies. This resulted in a greater number of treatments on an annual basis overall as well as increased treatment frequency for many individual streams. The average adult sea lamprey index decreased by 26% and lake trout wounding rates decreased by 21% across the Great Lakes basin during 2010 to 2017 when compared to 2000 to 2009. Recommended improvements to the stream selection model include: leveraging historic data and expert knowledge to identify streams for treatment, refining the accuracy of the ESTR decision tool, incorporating supplemental and alternative control methods into the treatment selection process, and identifying areas to improve larval assessment techniques that guide and evaluate lampricide control efforts.

海七鳃鳗 ( Petromyzon marinus) 是劳伦大湖的入侵物种，需要加以控制以保护有价值的渔业。海七鳃鳗控制计划（计划）每年使用化学方法（灭灯剂）来处理受感染的溪流，但有限的资源仅允许控制剂每年针对 100-125 条溪流。为了以最具成本效益的方式使用这些资源，该计划于 2000 年开始使用经验流处理排名 (ESTR) 系统作为选择处理流的决策支持工具。在 2002 年对幼虫评估技术进行全面审查后，该计划从劳动密集型的定量技术转变为基于单位努力捕捞量的更快速方法。工作人员资源被重新分配到杀灭灯剂控制，从而允许每年处理更多的溪流。从 2009 年开始，流选择转变为大型幼虫（> 100 毫米）的杀灭成本，并结合专家意见和有针对性的治疗策略。这导致总体上每年进行更多的处理，并增加了许多单独溪流的处理频率。与 2000 年至 2009 年相比，2010 年至 2017 年整个五大湖流域的平均成年海七鳃鳗指数下降了 26%，湖鳟鱼受伤率下降了 21%。对河流选择模型的建议改进包括：利用历史数据和专家知识确定处理流，改进 ESTR 决策工具的准确性，将补充和替代控制方法纳入处理选择过程，