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

Black Hawk Creek Popp County Access - Hudson

Fish Session #80

Sample Date
7/31/1996
Timeframe
1000-1300  
Reach Size
1325 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
2/26/2025 8:08:14 AM

Fish Health

# DELTs
3
# Non-DELTs
1

Equipment

Backpack Shockers
0
Blocknets
2
Barge Shocker
True
Property Access Notice

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

FIBI Score
51
Warm Water
Good
Session Comments

PARTLY CLOUDY, AIR TEMP. ABOUT 80-85 F. NORMAL BASE FLOW. WATER WAS MODERATELY TURBID; BOTTOM VISABLE TO ABOUT 1.5 FT. SAMPLING EFFECTIVE- NESS WAS REASONABLY GOOD DESPITE SUBSTANTIAL WIDTH OF STREAM AND NUMBEROUS SNAG OBSTACLES. DIFFICULTY WITH BLOCK NETS DUE TO WIDTH AND FLOW.

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
Spotfin Shiner
Latin: Cyprinella spiloptera
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
147
Sand Shiner
Latin: Miniellus stramineus
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
87
Common Shiner
Latin: Luxilus cornutus
Family: Leuciscidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
75
Bluntnose Minnow
Latin: Pimephales notatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
52
Golden Redhorse
Latin: Moxostoma erythrurum
Family: Catostomidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
21
Shorthead Redhorse
Latin: Moxostoma macrolepidotum
Family: Catostomidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
17
Common Carp
Latin: Cyprinus carpio
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
14
Silver Redhorse
Latin: Moxostoma anisurum
Family: Catostomidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
13
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
12
Bigmouth Shiner
Latin: Ericymba dorsalis
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
11
Northern Hog Sucker
Latin: Hypentelium nigricans
Family: Catostomidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
10
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
9
Channel Catfish
Latin: Ictalurus punctatus
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
9
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
8
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
5
Quillback Carpsucker
Latin: Carpiodes cyprinus
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
Stonecat
Latin: Noturus flavus
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
3
Slenderhead Darter
Latin: Percina phoxocephala
Family: Percidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
3
Hornyhead Chub
Latin: Nocomis biguttatus
Family: Leuciscidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
2
Fathead Minnow
Latin: Pimephales promelas
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1
Smallmouth Bass
Latin: Micropterus dolomieu
Family: Centrarchidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 295.0590
Log(DA) 2.4699
Total Fish 504
Fish per 500 ft 190
Total Species 21
# Excluded Taxa 0
# Exotic Species 1
# LMB-BG 0
Calculation Last Updated 4/17/2025 2:17:03 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 20 5.71
Sucker Species 6 7.5
Sensitive Species 4 3.33
Benthic Invertivore Species 7 5.83
Top 3 Abundance Percentage 61.31 6.01
Benthic Invertivore Percentage 14.88 2.53
Omnivore Percentage 15.87 8.47
Top Carnivore Percentage 1.98 2.81
Lithophilous Spawner Percentage 12.1 4.08
Tolerance Index 5.78 6.7
Adjusted Catch per Unit Effort 30.87 3.09
DELT Percentage Adjustment 0.6 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:

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 51
Total Reference Site Samples 140
Mean 67.94
Standard Deviation 13.97