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

Smallmouth Bass Micropterus dolomieu

Centrarchidae (Sunfish)
Trophic Class
Top Carnivore
Is Exotic to Iowa?
Is Lithophilous Spawner?
Is Hybrid?
State Listing Status
Not Listed
Assessment Program Statistics

This species was found at 218 bioassessment sites, 8 rapid fish bioassessment sites, 98 fisheries assessment sites, and 1 fisheries presence-only assessment site. In total, it was collected at 317 distinct sites, or 25.6% of the 1237 total sites monitored by the bioassessment program. It is the 20th most commonly collected species.

The Smallmouth Bass was collected in 465 bioassessment sampling sessions and 346 fisheries assessment sessions. It was present in 8 rapid bioassessment sessions and 1 presence-only session.

The biological assessment program has collected a total of 19,786 individual Smallmouth Bass specimens, ranking it the #19 most collected fish.

Species Distribution Map