Fig. 1.

Gridded global map of estimated riverine fish catches at 6-arcmin (∼10-km) resolution. Catch is modeled based on discharge and constrained using national statistics. Blank space represents areas with negligible overland flow, gray indicates nations that lack reliable catch data, and black outlines indicate ecoregions where catch can be estimated but dominance of lake or marine fishes required exclusion from testing environmental predictors.