Statistical Evaluation of Adaptive Management Study Duration

The project will be a collaborative study between selected CESU and the Corps of Engineers (Corps).

The purposes of the project are to:

1. Conduct a statistical power analysis to detect changes in native fish populations in Pool 22 of the UMR.

2. Identify indicator species of fish to guide future monitoring efforts.

3. Provide statistical evidence to support the effort required for future performance monitoring.

Work associated with this project (Task 1) includes:

1. Determining if a change in fish population can be detected in Pool 22 and adjacent Pools of the UMR.

a. Identify indicator species of fish. These may contain (but are not limited to):

i. Native fish of special interest:

Bigmouth Buffalo

Blue Catfish

Lake Sturgeon

Paddlefish

Shovelnose Sturgeon

Smallmouth Buffalo

ii. Invasive fish of special interest:

Silver Carp

2. Using catch per unit effort (CPUE) from long term electrofishing data in Pool 22 and adjacent Pools of the UMR to determine the numbering of sampling sites per sampling period needed to detect a change in fish populations for a range of scenarios:

a. Consider multiple sampling scenarios

b. Percent population change scenarios:

i. 30% change in population

ii. 15% change in population

c. Power scenarios:

i. 80% with 95% confidence interval

ii. 90% with 95% confidence interval

3. A summary report containing the findings of the statistical evaluation, data used as a part of this effort, and recommendations for future performance monitoring.

Work associated with this project (Task 2) includes:

Task 2: Collect and evaluate long term electrofishing data from multiple sites in Pool 22 in Fiscal year 2026 using stratified random sampling techniques.

a. A summary report of data collected as a part of this effort.

(Optional) Work associated with this project (Task 3) includes:

Task 3: Collect and evaluate long term electrofishing data from multiple sites in Pool 22 in Fiscal year 2027 using stratified random sampling techniques.

b. A summary report of data collected as a part of this effort.

Roles and Responsibilities:

The selected CESU will: 1) obtain, process, and analyze long term electrofishing data from the Upper Mississippi River; 2) determine if random stratified sampling methods can be used to detect changes in fish populations; 3) conduct a power analysis to determine the number of sampling sites per period by species needed to detect a population change in fish in Pool 22; 4) provide quarterly project updates to the Corps on study methods, results, and interpretation; 5) collect and evaluate additional data using the same stratified random techniques.