Fish Population Surveys
Our flagship program conducts comprehensive monitoring of freshwater and saltwater fish populations across national waterways. We track abundance, distribution, health indicators, and genetic diversity to build the most complete picture of aquatic biodiversity in the country.
Survey methods include electrofishing, seine netting, acoustic telemetry, eDNA sampling, and traditional creel surveys. Data is collected year-round by professional biologists and trained citizen scientists.
Current Research Programs
National Waterway Census
A five-year initiative to catalog fish species in every major watershed. This program combines field surveys with satellite imagery and environmental DNA to create baseline population data for long-term trend analysis.
Invasive Species Monitoring
Tracking the spread and impact of non-native aquatic species. We deploy early detection networks and rapid response protocols to contain invasive populations before they become established.
Climate & Fisheries
Studying how changing water temperatures, flow regimes, and drought patterns affect fish populations. Our models predict species range shifts and inform adaptive management strategies.
Spawning Habitat Assessment
Mapping and evaluating critical spawning habitats for priority species. This data guides habitat restoration projects and informs water management decisions during sensitive reproductive periods.
Publications & Data
Annual Fish Population Report (2025)
Our latest comprehensive report on fish population trends, habitat conditions, and management recommendations based on the previous year’s survey data.
Quarterly Survey Bulletins
Seasonal summaries of survey findings, notable observations, and emerging trends from our field teams across all regions.
Open Data Portal
Access raw survey data, GIS layers, and analytical tools. All FCRG research data is publicly available to support independent research and policy analysis.