Unnamed Tributary to Volga River E of Fayette (Volga_Grannis_58)
Fish Session #922
- Sample Date
- 8/21/2024
- Timeframe
- 32 minutes of effort
- Reach Size
- 360 ft
- Method
- Standard Wadeable
- Sample Quality
- Good
- Last Update
- 10/9/2024 1:05:01 PM
This site is on privately-owned land. The DNR obtains permission from the landowner(s) prior to conducting any sampling surveys.
Warm Water
Fair
water temperature 55 degrees conductivity was 650 µs/cm backpack shocker settings 60/20 130V 2.1A just downstream of first EF run was a hole that contained one brown trout ( 360mm in length) was sampled.
- 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 |
62 | |
|
Creek Chub
Latin: Semotilus atromaculatus
Family: Leuciscidae Tolerance: Tolerant Trophic: Generalist Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
48 | |
|
Stoneroller spp.
Latin: Campostoma spp.
Family: Leuciscidae Tolerance: N/A Trophic: Herbivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
1 | |
|
Fathead Minnow
Latin: Pimephales promelas
Family: Leuciscidae Tolerance: Tolerant Trophic: Omnivore Is Exotic: False Is LithoSpawner: False Is Hybrid: False |
1 | |
FIBI Calculation Factors
| Factor | Value |
|---|---|
| Drainage area (mi2) | 1.6400 |
| Log(DA) | 0.2148 |
| Total Fish | 112 |
| Fish per 500 ft | 156 |
| Total Species | 4 |
| # Excluded Species | 0 |
| # Exotic Species | 0 |
| # LMB-BG | 0 |
| Calculation Last Updated | 10/9/2024 1:05:01 PM |
Fish Index of Biotic Integrity
| Metric Name | Value | Score |
|---|---|---|
| Native Species | 4 | 10 |
| Sucker Species | 0 | 0 |
| Sensitive Species | 1 | 8.15 |
| Benthic Invertivore Species | 0 | 0 |
| Top 3 Abundance Percentage | 99.11 | 1.06 |
| Benthic Invertivore Percentage | 0 | 0 |
| Omnivore Percentage | 0.89 | 10 |
| Top Carnivore Percentage | 0 | 0 |
| Lithophilous Spawner Percentage | 0 | 0 |
| Tolerance Index | 4.41 | 8.87 |
| Adjusted Catch per Unit Effort | 17.22 | 1.72 |
| 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:
Paleozoic Plateau (Driftless Area)
This site is in the Paleozoic Plateau (Driftless Area) ecoregion.
| Max | 91 |
| 75th Percentile | 63 |
| Median | 54 |
| 25th Percentile | 47 |
| Min | 9 |
| This Session's Score | 36 |
| Total Reference Site Samples | 114 |
| Mean | 55.61 |
| Standard Deviation | 16.18 |