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

Dry Run Creek US of University AVE near UNI campus (DRC4)

Fish Session #1893

Sample Date
8/16/2018
Timeframe
1245-1340  
Reach Size
842 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
1/31/2019 8:14:28 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
3
Blocknets
0
Property Access Notice

This site is on privately-owned land. The DNR obtains permission from the landowner(s) prior to conducting any sampling surveys.

FIBI Score
24
Warm Water
Poor
Session Comments

Few fish collected, as usual for this site.

Collected Fish

Identity verification status for this species
Size Class: Typically only collected for sportfish
Taxa excluded from species count metrics.
Click on species name for more information about that species
Species Catch
Fantail Darter
Latin: Etheostoma flabellare
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
16
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
16
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
13
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
13
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
9
Largemouth Bass
Latin: Micropterus nigricans
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Top Carnivore-LMB Exclusion
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
6
Smallmouth Bass
Latin: Micropterus dolomieu
Family: Centrarchidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
6
Bluntnose Minnow
Latin: Pimephales notatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
2
Bluegill
Latin: Lepomis macrochirus
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
2

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 9.4320
Log(DA) 0.9746
Total Fish 83
Fish per 500 ft 49
Total Species 9
# Excluded Taxa 0
# Exotic Species 0
# LMB-BG 2
Calculation Last Updated 3/28/2025 12:42:38 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 7 4.31
Sucker Species 1 3.15
Sensitive Species 1 1.8
Benthic Invertivore Species 2 3.42
Top 3 Abundance Percentage 54.22 2.5
Benthic Invertivore Percentage 38.55 2.5
Omnivore Percentage 18.07 2.5
Top Carnivore Percentage 7.23 2.5
Lithophilous Spawner Percentage 0 0
Tolerance Index 6.08 2.5
Adjusted Catch per Unit Effort 7.01 0.7
DELT Percentage Adjustment 0 0

FIBI Score Explained

Sites that score between 0 - 25 are considered poor. Fish abundance is usually lower than normal or, if fish are abundant, the collection is dominated by a few tolerant species. The number of native fish species present is low. Sensitive species and habitat specialists are absent or extremely rare. The population is dominated by just a few ubiquitous species that are tolerant of wide-ranging water quality and habitat conditions. Pioneering, introduced and/or short-lived fish species are typically the most abundant types of fish. Fish collected at poor sites often have a higher than normal occurrence of external physical anomalies.

This location has been classified as a survey site. Survey sites are compared to reference sites within the same ecoregion. A reference site represents natural stream qualities that are least disturbed by human activities within the watershed. Reference sites are grouped by ecoregion to establish a benchmark against which these survey streams are compared.

EcoRegion Comparison

Scores for a sampling session are compared against reference sites within the same ecoregion:

Iowan Surface

This site is in the Iowan Surface ecoregion.

Ecoregion Map
Max 92
75th Percentile 77
Median 70
25th Percentile 60
Min 27
This Session's Score 24
Total Reference Site Samples 140
Mean 67.94
Standard Deviation 13.97