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 119,744
Creek Chub 107,986
Bluntnose Minnow 105,745
White Sucker 103,009
Common Shiner 88,910

Top 5 Most Common Fish

Species % of all sites
Creek Chub 71.27%
White Sucker 62.76%
Bigmouth Shiner 61.36%
Johnny Darter 59.48%
Bluntnose Minnow 58.7%

BioNet Sessions

Methodology Sessions
Standard Wadeable 1673
Rapid Assessment 180
Non-wadeable 47
Fishkill Followup 28

FishNet Sessions

Methodology Sessions
Standard Wadeable 292
Game Fish Only 173
Fisheries Non-wadeable 117
Game Fish/Non-game Presence Only Survey 89

BioNet FIBI Scores

Stream Sample Date Score

FishNet FIBI Scores

Stream Sample Date Score