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

Rainbow Trout Oncorhynchus mykiss

Salmonidae (Trouts)
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 25 bioassessment sites, 0 rapid fish bioassessment sites, 37 fisheries assessment sites, and 1 fisheries presence-only assessment site. In total, it was collected at 61 distinct sites, or 5.1% of the 1206 total sites monitored by the bioassessment program. It is the 57th most commonly collected species.

The Rainbow Trout was collected in 50 bioassessment sampling sessions and 80 fisheries assessment sessions. It was present in 0 rapid bioassessment sessions and 1 presence-only session.

The biological assessment program has collected a total of 932 individual Rainbow Trout specimens, ranking it the #61 most collected fish.

Species Distribution Map