Iowa DNR
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments

Relative Abundance

Relative abundance of fish species is used during rapid assessments of the fish community. Rather than counting individual fish of each species, estimates are made using the following categories:

This page was created 4/26/2021 8:54:20 AM and was last updated 4/4/2022 9:30:40 AM