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

Bear Creek Shellsburg

Fish Session #1545

Sample Date
10/3/2013
Timeframe
11:55-14:10  
Reach Size
1075 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
4/26/2022 8:46:17 AM

Fish Health

# DELTs
2
# Non-DELTs
1

Equipment

Backpack Shockers
0
Blocknets
1
Barge Shocker
True
Boat Shocker
False
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
61
Warm Water
Good
Session Comments

No comments recorded.

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
Bluntnose Minnow
Latin: Pimephales notatus
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
941
Sand Shiner
Latin: Notropis stramineus
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
568
Spotfin Shiner
Latin: Cyprinella spiloptera
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
447
Bigmouth Shiner
Latin: Notropis dorsalis
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
402
Central Stoneroller
Latin: Campostoma anomalum
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Herbivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
294
Common Shiner
Latin: Luxilus cornutus
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
164
Hornyhead Chub
Latin: Nocomis biguttatus
Family: Cyprinidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
140
Golden Redhorse
Latin: Moxostoma erythrurum
Family: Catostomidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
96
Carmine Shiner
Latin: Notropis percobromus
Family: Cyprinidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
88
Northern Hog Sucker
Latin: Hypentelium nigricans
Family: Catostomidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
72
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
71
Smallmouth Bass
Latin: Micropterus dolomieu
Family: Centrarchidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
69
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
66
Fantail Darter
Latin: Etheostoma flabellare
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
55
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
23
Largemouth Bass
Latin: Micropterus salmoides
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Largemouth Bass
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
22
Suckermouth Minnow
Latin: Phenacobius mirabilis
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
21
Western Blacknose Dace
Latin: Rhinichthys obtusus
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
13
Bluegill
Latin: Lepomis macrochirus
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
10
Shorthead Redhorse
Latin: Moxostoma macrolepidotum
Family: Catostomidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
5
Yellow Bullhead
Latin: Ameiurus natalis
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
5
Stonecat
Latin: Noturus flavus
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4
Rainbow Darter
Latin: Etheostoma caeruleum
Family: Percidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
3
Hybrid sunfish
Latin:
Family: Centrarchidae
Tolerance: N/A
Trophic: N/A
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: True
1 [X]
Blackstripe Topminnow
Latin: Fundulus notatus
Family: Fundulidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1
Collection Notes
[X] = Excluded from species count metrics

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 51.8480
Log(DA) 1.7147
Total Fish 3581
Fish per 500 ft 1666
Total Species 25
# Excluded Taxa 1
# Exotic Species 0
# LMB-BG 2
Calculation Last Updated 4/26/2022 8:46:17 AM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 22 7.7
Sucker Species 4 7.16
Sensitive Species 5 5.11
Benthic Invertivore Species 9 8.75
Top 3 Abundance Percentage 54.62 7.05
Benthic Invertivore Percentage 9.13 2.23
Omnivore Percentage 26.93 7.01
Top Carnivore Percentage 1.93 4.37
Lithophilous Spawner Percentage 5.42 2.63
Tolerance Index 6.46 5.62
Adjusted Catch per Unit Effort 201.49 10
DELT Percentage Adjustment 0.06 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 59
Min 27
This Session's Score 61
Total Reference Site Samples 137
Mean 67.77
Standard Deviation 13.85