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

Largemouth Bass Micropterus salmoides

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

This species was found at 323 bioassessment sites, 44 rapid fish bioassessment sites, 79 fisheries assessment sites, and 2 fisheries presence-only assessment sites. In total, it was collected at 428 distinct sites, or 36.3% of the 1179 total sites monitored by the bioassessment program. It is the 12th most commonly collected species.

The Largemouth Bass was collected in 555 bioassessment sampling sessions and 191 fisheries assessment sessions. It was present in 44 rapid bioassessment sessions and 2 presence-only sessions.

The biological assessment program has collected a total of 5,765 individual Largemouth Bass specimens, ranking it the #33 most collected fish.

Species Distribution Map