Cooperative Fish and Wildlife Research Units Program:
Education, Research and Technical Assistance for Managing Our Natural Resources


Development of a basis for allocation of fish production between management needs and double-crested cormorant predation within their nesting range

October 2020 - September 2022


Participating Agencies

Double-crested cormorants (DCCO) are a native waterbird that consume fish species that anglers prefer to catch (e.g., yellow perch) or that are prey for preferred fish. As populations of DCCO grow around the country, anglers have voiced concerns about these birds consuming too many fish and removing angling opportunity. The goal of this project is to provide decision support to the USFWS for allocating fish production in lake systems in the US between stakeholders (e.g., recreational fishers) and predators (i.e., DCCO). In an this project we are conducting a series of structured decision making workshops with biologists and managers around the region to determine objectives for DCCO control, creating quantitative models of fish and DCCO to predict the outcomes of management actions on each objective, and making tradeoffs among objectives.