6 | CONCLUSIONS
Given the lackluster success of reintroducing extirpated fish populations from hatchery broodstock (Cochran‐Biederman et al ., 2015; Lamothe and Drake, 2019), managers will undoubtedly need to identify ways to improve factors that contributed to initial (and current) population declines to make long-term conservation progress. Here, we address this challenge by identifying and quantifying the relative influence of continued and new stressors on the conservation of an imperiled species. Our study suggests that further assessing whether contemporary prey abundances are limiting the establishment of Colorado Pikeminnow in the San Juan River is an important next step in identifying requisite management actions under continued river regulation and native species loss. This study further contributes to the growing understanding of trophic structure changes that may occur following river regulation (e.g., DeBoer et al . 2022; DeLonget al . 2011; DeLong et al. 2021; Thoms and DeLong, 2018; Turner et al ., 2015).