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

Duttons Creek West Union - Duttons Cave Park (DuCr1)

Fish Session #2248

Sample Date
7/27/2022
Timeframe
1230-1305  
Reach Size
550 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
1/25/2023 1:19:46 PM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
1
Blocknets
0
Property Access Notice

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

FIBI Score
42
Warm Water
Fair
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
Brook Trout
Latin: Salvelinus fontinalis
Family: Salmonidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
45
Slimy Sculpin
Latin: Cottus cognatus
Family: Cottidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
26

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 0.8610
Log(DA) 0.0001
Total Fish 71
Fish per 500 ft 65
Total Species 2
# Excluded Taxa 0
# Exotic Species 0
# LMB-BG 0
Calculation Last Updated 3/7/2025 10:27:04 AM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 2 10
Sucker Species 0 0
Sensitive Species 2 10
Benthic Invertivore Species 1 10
Top 3 Abundance Percentage 100 0
Benthic Invertivore Percentage 36.62 5
Omnivore Percentage 0 5
Top Carnivore Percentage 63.38 0
Lithophilous Spawner Percentage 0 0
Tolerance Index 0 5
Adjusted Catch per Unit Effort 12.91 1.29
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 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 42
Total Reference Site Samples 114
Mean 55.61
Standard Deviation 16.18