Seminar title: An ecosystem approach to navigating fish restoration in Keuka Lake | Abstract: Fisheries restoration is increasingly used to recover populations and improve food web function. Despite widespread application, the ability to evaluate restoration success is often limited without system-specific information, including the original driver(s) of fish population decline. This seminar will present the trajectory of two planktivorous fishes: introduced Alewife (Alosa pseudoharengus) and extirpated Cisco (Coregonus artedi), the focal species of a reintroduction effort in Keuka Lake by NYS Department of Environmental Conservation. We first investigate the collapse of Alewife by the mid-2010s, testing both top-down and bottom-up hypotheses for population decline. Next, we evaluate subsequent juvenile Cisco reintroduction efforts beginning in 2018 to present using emerging technologies acoustic telemetry and environmental DNA technologies. Finally, we believe insights from the past are important to inform the future: results from population and food web modeling were used to assess the viability of future restoration scenarios. Food web analyses were useful for quantifying energy flows from lower trophic mysid opossum shrimps (Mysis diluviana) to apex predators Lake Trout (Salvelinus namaycush). Combined, this integrated approach provided opportunity to evaluate fish restoration in Keuka Lake with application to cold-water lake ecosystems.