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

Coldwater Creek Coldwater Creek SWMA - Bluffton

Fish Session #43

Sample Date
7/11/1995
Timeframe
0830-1130  
Reach Size
1162 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
10/1/2004 12:00:00 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
2
Blocknets
2
Property Access Notice

This site is on public land, such as a county park, state park, or state-managed wildlife area.

FIBI Score
56
Warm Water
Good
Session Comments

CLEAR SKY, TEMP ABOUT 85 F. WATER WAS CLEAR, BOTTOM VISABLE TO ABOUT 2.5 FT. MAX. DEPTH IN SAMPLING AREA WAS APPROX. 3 FT. BOTH COFFELT BP SHOCKERS PERFORMED WELL.

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
Longnose Dace
Latin: Rhinichthys cataractae
Family: Leuciscidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
428
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
153
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
73
Central Stoneroller
Latin: Campostoma anomalum
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Herbivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
66
Bluntnose Minnow
Latin: Pimephales notatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
63
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
63
Western Blacknose Dace
Latin: Rhinichthys obtusus
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
50
Brook Stickleback
Latin: Culaea inconstans
Family: Gasterosteidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
50
Fathead Minnow
Latin: Pimephales promelas
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
46
Fantail Darter
Latin: Etheostoma flabellare
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
17
Rainbow Trout
Latin: Oncorhynchus mykiss
Family: Salmonidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
9
Southern Redbelly Dace
Latin: Chrosomus erythrogaster
Family: Leuciscidae
Tolerance: Sensitive
Trophic: Herbivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 22.3660
Log(DA) 1.3496
Total Fish 1019
Fish per 500 ft 438
Total Species 12
# Excluded Taxa 0
# Exotic Species 1
# LMB-BG 0
Calculation Last Updated 2/7/2025 2:32:16 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 11 4.89
Sucker Species 1 2.27
Sensitive Species 4 5.19
Benthic Invertivore Species 3 3.7
Top 3 Abundance Percentage 64.18 6.81
Benthic Invertivore Percentage 49.85 10
Omnivore Percentage 25.71 7.63
Top Carnivore Percentage 0.88 4.26
Lithophilous Spawner Percentage 0 0
Tolerance Index 3.5 10
Adjusted Catch per Unit Effort 71.26 7.13
DELT Percentage Adjustment 0 0

FIBI Score Explained

Sites that score between 51 - 70 are considered good. Fish (excluding tolerant species) are fairly abundant to very abundant. If high numbers are present, intermediately tolerant species or tolerant species are usually dominant. A moderately high number of fish species belonging to several families are present. The three most abundant fish species typically comprise two-thirds or less of the total number of fish. Several long-lived species and benthic invertivore species are present. One or more sensitive species are usually present. Top carnivore species are usually present in low numbers and often one or more life stages are missing. Species that require silt-free, rock substrate for spawning or feeding are present in low proportion to the total number of fish. Fish condition is good; typically less than 1% of the total number of fish exhibits external anomalies associated with disease or stress.

This location has been classified as a Reference Site. Reference sites represent natural stream qualities that are least disturbed by human activities within the watershed. These sites are then grouped by ecoregion to establish a benchmark against which other streams in the same ecoregion are compared.

EcoRegion Comparison

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

Paleozoic Plateau (Driftless Area)

This site is in the Paleozoic Plateau (Driftless Area) ecoregion.

Ecoregion Map
Max 91
75th Percentile 63
Median 54
25th Percentile 47
Min 9
This Session's Score 56
Total Reference Site Samples 114
Mean 55.61
Standard Deviation 16.18