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

Mud Creek Wilton WWTP (US)

Fish Session #100

Sample Date
9/24/1996
Timeframe
1345-1515  
Reach Size
630 ft
Method
Standard Wadeable
Sample Quality
Poor
Last Update
10/1/2004 12:00:00 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
0
Blocknets
1
Barge Shocker
True
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
18
Warm Water
Poor
Session Comments

CLEAR SKY, AIR TEMP. ABOUT 75 F. FLOW BARELY PERCEPTIBLE DUE TO LOW GRADIENT, PROBABLY NEAR BASE FLOW OR SLIGHTLY BELOW. WATER WAS TURBID; BOTTOM VISABLE TO ONLY APPROX. 1 FT. SAMPLING EFFECTIVENESS FAIRLY POOR DUE TO LARGE, DEEP AREAS THAT WERE INACCESSIBLE. EVEN SO, FISH ABUNDANCE WAS LOW DESPITE SAMPLING EQUIP. APPARENTLY FUNCTIONING PROPERLY. SEE FLD.NOTES

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
Red Shiner
Latin: Cyprinella lutrensis
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
107
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
78
Bluntnose Minnow
Latin: Pimephales notatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
64
Bigmouth Shiner
Latin: Ericymba dorsalis
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
19
Spotfin Shiner
Latin: Cyprinella spiloptera
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
12
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
12
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
9
Common Shiner
Latin: Luxilus cornutus
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
7
Fathead Minnow
Latin: Pimephales promelas
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
7
Common Carp
Latin: Cyprinus carpio
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
5
Sand Shiner
Latin: Miniellus stramineus
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
River Carpsucker
Latin: Carpiodes carpio
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
2
Yellow Bullhead
Latin: Ameiurus natalis
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1
Channel Catfish
Latin: Ictalurus punctatus
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 96.7380
Log(DA) 1.9856
Total Fish 332
Fish per 500 ft 263
Total Species 15
# Excluded Taxa 0
# Exotic Species 1
# LMB-BG 0
Calculation Last Updated 2/7/2025 2:32:38 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 14 4.23
Sucker Species 2 3.09
Sensitive Species 0 0
Benthic Invertivore Species 2 1.68
Top 3 Abundance Percentage 75 3.89
Benthic Invertivore Percentage 3.92 0.83
Omnivore Percentage 56.93 3.05
Top Carnivore Percentage 0.3 1.4
Lithophilous Spawner Percentage 0 0
Tolerance Index 9.35 1.03
Adjusted Catch per Unit Effort 6.83 0.68
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:

Rolling Loess Prairies

This site is in the Rolling Loess Prairies ecoregion.

Ecoregion Map
Max 83
75th Percentile 59
Median 48
25th Percentile 38
Min 10
This Session's Score 18
Total Reference Site Samples 105
Mean 49.02
Standard Deviation 14.97