Upper Midwest Environmental Sciences Center
Pool 4, Upper Mississippi River 2004 Fish Collection Summary
This report is a bullet summary of the Long Term Resource Monitoring Program's fish collection efforts conducted by the Lake City Field Station on Pool 4, Upper Mississippi River during 2004. Information on changes in fish catch over all years can be obtained from the Graphical Fish Database Browser.
- 245 fish collections were conducted using six gear types (Table
2.1), with 204 from randomly selected sites and 41 from fixed sites.
- Side channel borders, backwaters, and main channel borders received
the most sampling effort. (Table 2.1).
- Gear allocations among strata were the same for all three sampling
periods except for one fewer trawl run during period 3.
- In 2004, water levels were lower than normal during April and early
May (typically the peak flood period), but considerably higher than
normal during late May and June. Water levels did not affect sample
allocations (Figure 1.1).
- 30,921 fish representing 65 species and 3 hybrids were collected (Table
3.1). Historical fish distribution records for the Upper Mississippi
River (Pitlo et al. 1995) document 99 fish species from Pool 4. To date
the Lake City field station has collected a total of 89 species and
5 hybrids.
- The three fish species with the highest
total catch were 22,334 emerald shiners, 1,913 bluegill, and 624 gizzard
shad (Table 3.1).
- One paddlefish, a Minnesota threatened species, was collected. Eight
blue suckers, six lake sturgeon, and four black buffalo, all Minnesota
species of special concern, were also collected (Table
3.1).
- Mean catch-per-unit-effort and standard error for fish collected
by the LTRMP using stratified random and fixed-site sampling for each
stratum are shown in Pool
4 tables. Length distributions for selected species of fish are
shown in Figures 1 to
17.
Content manager: Jennie
Sauer
Page Last Modified: April 17, 2018