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

Elk Creek SW of Northwood (EL001)

Fish Session #155

Sample Date
9/10/1999
Timeframe
27.0
Reach Size
1119 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
12/31/2015 10:17:33 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
0
Blocknets
0
Barge Shocker
True
Boat Shocker
False
This sampling session was collected as part of the FishNet program.
Notice: This sampling session has not been through a Quality Assurance check and may contain errors. This alert will be removed once the QA has been completed.
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
33
Warm Water
Fair
Session Comments

Water Temp 56 F, Secchi 12".

Collected Fish

Identity verification status for this species
Morphometrics: Length/Weight measurements of individual specimens
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
1316
Green Sunfish
Latin: Lepomis cyanellus
Family: Centrarchidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1106
Fathead Minnow
Latin: Pimephales promelas
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
434
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
308
Sand Shiner
Latin: Notropis stramineus
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
111
Black Bullhead
Latin: Ameiurus melas
Family: Ictaluridae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
72
Johnny Darter
Latin: Etheostoma nigrum
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
54
Common Carp
Latin: Cyprinus carpio
Family: Cyprinidae
Tolerance: Tolerant
Trophic: Omnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
34
Tadpole Madtom
Latin: Noturus gyrinus
Family: Ictaluridae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
31
Brassy Minnow
Latin: Hybognathus hankinsoni
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Herbivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
26
Orangespotted Sunfish
Latin: Lepomis humilis
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
23
Northern Pike
Latin: Esox lucius
Family: Esocidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
21
Hornyhead Chub
Latin: Nocomis biguttatus
Family: Cyprinidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
15
Stonecat
Latin: Noturus flavus
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
15
Central Mudminnow
Latin: Umbra limi
Family: Esocidae
Tolerance: Tolerant
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
14
Common Shiner
Latin: Luxilus cornutus
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
14
Yellow Bullhead
Latin: Ameiurus natalis
Family: Ictaluridae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
14
Smallmouth Bass
Latin: Micropterus dolomieu
Family: Centrarchidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
6
Suckermouth Minnow
Latin: Phenacobius mirabilis
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: True
Is Hybrid: False
5
Largemouth Bass
Latin: Micropterus salmoides
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Largemouth Bass
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
2
Black Crappie
Latin: Pomoxis nigromaculatus
Family: Centrarchidae
Tolerance: Intermediate
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1
Central Stoneroller
Latin: Campostoma anomalum
Family: Cyprinidae
Tolerance: Intermediate
Trophic: Herbivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
1
Rock Bass
Latin: Ambloplites rupestris
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) 52.0000
Log(DA) 1.7160
Total Fish 3624
Fish per 500 ft 1619
Total Species 23
# Excluded Species 0
# Exotic Species 1
# LMB-BG 1
Calculation Last Updated 1/8/2021 3:02:35 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 21 7.34
Sucker Species 1 1.79
Sensitive Species 5 5.1
Benthic Invertivore Species 5 4.86
Top 3 Abundance Percentage 78.81 3.29
Benthic Invertivore Percentage 3.28 0.8
Omnivore Percentage 57.73 2.94
Top Carnivore Percentage 0.8 2.81
Lithophilous Spawner Percentage 0.14 0.07
Tolerance Index 9 1.59
Adjusted Catch per Unit Effort 57.91 5.79
DELT Percentage Adjustment 0 0

FIBI Score Explained

Sites that score between 26 - 50 are considered fair. Fish abundance ranges from lower than average to very abundant. If fish are abundant, tolerant species are usually dominant. Native fish species usually equal ten or more species. The three most abundant species typically comprise two-thirds or more of the total number of fish. One or more sensitive species, long-lived fish species or benthic habitat specialists such as suckers (Catostomidae) are present. Top carnivore species are often, but not always present in low abundance. Species that are able to utilize a wide range of food items including plant, animal and detritus are usually more common than specialized feeders, such as benthic invertivore fish. Species that require silt-free, rock substrate for spawning or feeding are typically rare or absent. Fish condition is usually good; however, elevated levels of fish exhibiting external anomalies associated with disease or stress are not unusual.

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:

Des Moines Lobe

This site is in the Des Moines Lobe ecoregion.

Ecoregion Map
Max 85
75th Percentile 63
Median 54
25th Percentile 39
Min 13
This Session's Score 33
Total Reference Site Samples 140
Mean 51.46
Standard Deviation 15.75