Upper Midwest Environmental Sciences Center
2003 Report
Pool 4, Upper Mississippi River 2003 Fish Collection Summary
This report is a bullet summary of the Long Term Resource Monitoring Program's (LTRMP)fish collection efforts conducted by the Lake City Field Station on Pool 4, Upper Mississippi River during 2003. Information on changes in fish catch over all years can be obtained from the Graphical Fish Database Browser.
- 28 fish collections were conducted using day electrofishing (Table
2.1).
- Water levels were below the long-term mean from mid-January
to late April (Figure
1.1). From April to May, water levels fluctuated above and below
the long-term mean. Water levels rose significantly above the
long-term mean for period 1. During periods 2 and 3, water
levels remained below the long-term average.
- Of the 28 fish collections, 26 were from randomly selected sites,
and 2 were from fixed sites. The reduction in fish collections and gear
types from the previous year were because of the elimination of sampling
during periods 1 and 2, and the reduction of sampling during period
3 to only day electrofishing.
- Side channel borders, backwaters, and main channel borders received
equivalent sampling effort (Table 2.1).
- 2,470 fish, representing 48 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.
- During the 2003 fish sampling season, the three species with the highest
total catch were as follows: 729 gizzard shad, 312 largemouth bass,
and 300 emerald shiners.
- Mean catch-per-unit-effort and standard error for fish collected
by day electrofishing using stratified random (Table
4.1) and fixed-site sampling (Table
14.1) for each stratum are shown.
- Length distributions for selected species of fish are shown in Figures 1
to 17.
Content manager: Jennie
Sauer
Page Last Modified: April 17, 2018