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

Unnamed Tributary to North Bear Creek NE of Highlandville (UI_NBC_02&03)

Fish Session #876

Sample Date
8/30/2023
Timeframe
34 min
Reach Size
1417 ft
Method
Standard Wadeable
Sample Quality
Good
Last Update
1/23/2024 10:05:55 AM

Fish Health

# DELTs
0
# Non-DELTs
0

Equipment

Backpack Shockers
1
Blocknets
0
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 notice 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
17
Warm Water
Poor
Session Comments

Part of the Cold Water project. Water temperature 58 F, Conductivity 600 µS/cm. The fish survey was completed in 3 runs, these runs correspond to the same locations of the runs for the habitat survey. In run 1 we sampled 4 Brown Trout and 19 Brook Stickleback, run 2 included 3 Brook Trout and 14 Brook Stickleback, run 3 contained 26 Brook Stickleback in run 3 pt. 1 and 14 Brook Stickleback in run 3 pt. 2. This survey represents the total from all of the runs combined.

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
Brook Stickleback
Latin: Culaea inconstans
Family: Gasterosteidae
Tolerance: Sensitive
Trophic: Insectivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
73
Brown Trout
Latin: Salmo trutta
Family: Salmonidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: True
Is LithoSpawner: False
Is Hybrid: False
4
Brook Trout
Latin: Salvelinus fontinalis
Family: Salmonidae
Tolerance: Sensitive
Trophic: Top Carnivore
Is Exotic: False
Is LithoSpawner: False
Is Hybrid: False
3

FIBI Calculation Factors

Factor Value
Drainage area (mi2) 2.4000
Log(DA) 0.3802
Total Fish 80
Fish per 500 ft 28
Total Species 3
# Excluded Species 0
# Exotic Species 1
# LMB-BG 0
Calculation Last Updated 6/20/2024 10:22:44 AM

Fish Index of Biotic Integrity

Metric Name Value Score
Native Species 2 3.16
Sucker Species 0 0
Sensitive Species 3 10
Benthic Invertivore Species 0 0
Top 3 Abundance Percentage 100 0
Benthic Invertivore Percentage 0 0
Omnivore Percentage 0 2.5
Top Carnivore Percentage 8.75 0
Lithophilous Spawner Percentage 0 0
Tolerance Index 0 2.5
Adjusted Catch per Unit Effort 5.36 0.54
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 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:

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 17
Total Reference Site Samples 114
Mean 55.61
Standard Deviation 16.18