Fish Reports
2007 Report
Pool 4, Upper Mississippi River 2007 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 for Pool
4 of the Upper Mississippi River in 2007.
- 162 fish collections were conducted using six gear types (Table
2.1), with 134 from randomly selected sites and 28 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 both sampling periods except for a variation between strata for main channel border wing dam during period three.
- In 2007 water levels were higher than the average mean during mid-February through mid-March (somewhat earlier than the average spring peak). Water levels from early April through mid-September were lower than normal. Water levels increased from mid-September through the end of October. Sampling was difficult in backwaters and some side channels. Alternate sites were necessary during this low water period. (Figure 1.1).
- 15,342 fish representing 59 species and 2 hybrids were collected (Table
3.1). Historical fish distribution for the Upper Mississippi River (Pitlo et al. 1995) documents 99 fish species from Pool 4. To date the Lake City Field Station has collected a total of 88 species and 5 hybrids.
- The three fish species with the highest total catch were 5,144 bluegill, 2,531 emerald shiners, and 2,034 gizzard shad (Table 3.1).
- Fourteen shovelnose sturgeon, three lake sturgeon, and one black buffalo, all Minnesota species of special concern, were 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.
Page Last Modified:
June 1, 2018
