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

Fish Program Statistics and Summary

Since the bioassessment program began in 1994, fish surveys have been a critical component of the assessment process. In 2015, the BioNet application began hosting data collected by other programs within the Iowa DNR that collected fish using the Bioassessment protocols. These data are stored in the FishNet portion of BioNet.

Total Fish Collected
Unique Fish Species
Total Surveys
FIBI Assessments

Top 5 Most Collected Fish

Species Total Catch
Central Stoneroller 106,984
Creek Chub 99,120
Bluntnose Minnow 98,863
White Sucker 88,479
Common Shiner 75,834

Top 5 Most Common Fish

Species % of all sites
Creek Chub 70.21%
White Sucker 61.8%
Bigmouth Shiner 60.97%
Johnny Darter 58.25%
Bluntnose Minnow 57.84%

BioNet Sessions

Methodology Sessions
Standard Wadeable 1521
Rapid Assessment 180
Non-wadeable 41
Fishkill Followup 28

FishNet Sessions

Methodology Sessions
Standard Wadeable 219
Game Fish Only 126
Fisheries Non-wadeable 103
Game Fish/Non-game Presence Only Survey 63
Stream Sample Date Score
Stream Sample Date Score