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

Pigeon Creek Neola

Fish Session #110

Sample Date
7/29/1997
Timeframe
1345-1445  
Reach Size
401 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
2
Blocknets
2
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
9
Warm Water
Poor
Session Comments

PARTLY CLOUDY SKY AND AIR TEMP. APPROX. 80 F. FLOW PROBABLY ABOVE NORMAL FOR JULY AND WATER WAS TURBID. STREAM BOTTOM VISIBLE ONLY TO 6"-8". VERY SWIFT CURRENT MADE WADING AND FISHING DIFFICULT. VERY NARROW TRENCH- LIKE CHANNEL W/ UNEVEN BOTTOM CARVED INTO HARDPAN. GENERALLY POOR SAMPLING CONDITIONS BECAUSE OF HIGH FLOW AND CURRENT VELOCITY. VERY FEW FISH SEEN & CAPTURED. EVEN SLACK WATER AREAS DID NOT HOLD MANY FISH.

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
Fathead Minnow
Latin: Pimephales promelas
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
6
Gizzard Shad
Latin: Dorosoma cepedianum
Family: Dorosomatidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
Red Shiner
Latin: Cyprinella lutrensis
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
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
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
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) 111.1200
Log(DA) 2.0458
Total Fish 20
Fish per 500 ft 25
Total Species 7
# Excluded Taxa 0
# Exotic Species 0
# LMB-BG 1
Calculation Last Updated 2/7/2025 2:32:41 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 6 2.61
Sucker Species 0 0
Sensitive Species 0 0
Benthic Invertivore Species 0 0
Top 3 Abundance Percentage 70 2.5
Benthic Invertivore Percentage 0 0
Omnivore Percentage 70 1.32
Top Carnivore Percentage 5 2.5
Lithophilous Spawner Percentage 0 0
Tolerance Index 9.25 1.19
Adjusted Catch per Unit Effort 0.75 0.08
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 Rejected Candidate Reference Site. This site was considered for Reference Site status, but subsequent biological assessments have determined that this site does not meet the qualifications of a Reference Site.

EcoRegion Comparison

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

Steeply Rolling Loess Prairies

This site is in the Steeply Rolling Loess Prairies ecoregion.

Ecoregion Map
Max 52
75th Percentile 42
Median 36
25th Percentile 27
Min 12
This Session's Score 9
Total Reference Site Samples 24
Mean 34.04
Standard Deviation 10.79