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

North Cedar Creek Public Access Area- Sny Magill (RMN Trend Site)

Fish Session #2442

Sample Date
7/22/2024
Timeframe
1250-1338  
Reach Size
599 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
1/31/2025 9:21:51 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
2
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
56
Warm Water
Good
Session Comments

One large, deep pool at top of reach was not sampled effectively. BP shocker times: 19:10, 17:27

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
Fantail Darter
Latin: Etheostoma flabellare
Family: Percidae
Tolerance: Intermediate
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
177
Brown Trout
Latin: Salmo trutta
Family: Salmonidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
47
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae
Tolerance: Tolerant
Trophic: Generalist
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
5
Longnose Dace
Latin: Rhinichthys cataractae
Family: Leuciscidae
Tolerance: Sensitive
Trophic: Benthic Invertivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
5
White Sucker
Latin: Catostomus commersonii
Family: Catostomidae
Tolerance: Intermediate
Trophic: Omnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
4

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 5.0600
Log(DA) 0.7042
Total Fish 238
Fish per 500 ft 199
Total Species 5
# Excluded Taxa 0
# Exotic Species 1
# LMB-BG 0
Calculation Last Updated 2/7/2025 2:34:33 PM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 4 3.41
Sucker Species 1 4.36
Sensitive Species 2 4.97
Benthic Invertivore Species 2 4.73
Top 3 Abundance Percentage 96.22 1.38
Benthic Invertivore Percentage 76.47 10
Omnivore Percentage 1.68 10
Top Carnivore Percentage 19.75 10
Lithophilous Spawner Percentage 0 0
Tolerance Index 4.01 9.51
Adjusted Catch per Unit Effort 31.05 3.1
DELT Percentage Adjustment 0 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:

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 56
Total Reference Site Samples 114
Mean 55.61
Standard Deviation 16.18