Upper Midwest Environmental Sciences Center
Pool 8, Upper Mississippi River 2001 Fish Collection Summary
This report is a summary of the Long Term Resource Monitoring Program's (LTRMP) fish collection efforts conducted by the Onalaska Field Station on Pool 8, Upper Mississippi River during 2001. Information on changes in fish catch over all years can be obtained from the Graphical Fish Database Browser.
- 431 fish collections were conducted using 10 gear types (Table
2.2).
- 42 collections of the 160 that were eliminated in 2000 were restored
in an effort to bolster catches of adult fish (Table
2.2). These included day electrofishing, fyke net, and hoop net
collections.
- Despite near-record flooding in April and a pool-wide drawdown during
much of the sampling season, water levels had only minor effects on
sampling —one large hoop net was lost in high water during period
1 (Table 2.2; Figure
1.2).
- Of the 431 collections, 378 were from randomly selected sites. Fifty-three
collections were made at fixed sites.
- Backwater, main channel border, and side channel border strata received
the most sampling effort (Table 2.2).
- 99,023 fish were collected representing 75 species and 3 hybrids (Table
3.2).
- Historical fish distribution records for the Upper Mississippi River
(Pitlo et al. 1995) document 99 fish species from Pool 8.
- The LTRMP species total for Pool 8 before the 2000 season was 90;
no new species were added to this total since 1997.
- One pallid shiner was collected, a Wisconsin-listed endangered species
(Table 3.2).
- One speckled chub, 44 river redhorse, and six blue suckers, all of
which are threatened in Wisconsin, were collected (Table
3.2).
- Mean catch-per-unit-effort and standard error for fish collected
by gears using stratified random (Tables
4.2-12.2) and fixed-site sampling (Tables
15.2-21.2) for each stratum are shown.
- Length distributions for selected species of fish are shown in Figures 2.2 to19.2.
Content manager: Jennie Sauer
Page Last Modified: April 17, 2018