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Fish Reports

2007 Report

Pool 26, Upper Mississippi River 2007 Fish Collection Summary

This report is a bullet summary of the Long Term Resource Monitoring Program's (LTRMP) fish collection efforts conducted by the Great Rivers Field Station for Pool 26 of the Upper Mississippi River in 2007.

• 182 fish collections were conducted using six gear types (Table 2.4), with 174 from randomly selected sites and 8 from a fixed site.

• Backwater; main channel border, unstructured; and side channel border strata received the most sampling effort (Table 2.4).

• A brief flood in mid-August caused minor sampling delays but did not affect sample allocations (Table 2.4; Figure 1.4).

• 18,637 fish were collected representing 54 species and 3 hybrids (Table 3.4). This total includes 9 unidentified suckers (Catostomidae) less than 150 mm long, 45 unidentified sunfishes (Centrarchidae) less than 20 mm long, 121 unidentified minnows (Cyprinidae) less than 20 mm long, and 3 unidentified young-of-the-year fish less than 10 mm long.

• The LTRMP species total for Pool 26 before the 2007 season was 91; no new species were collected in the 2007 season (Table 3.4).

• No Illinois-listed threatened or endangered species were collected (Table 3.4).

• Other species that were collected and are noted as uncommon, rare, or probably strays from tributaries (Pitlo et al. 1995) in Pool 26 were Mississippi silvery minnow, golden redhorse, blue sucker, tadpole madtom, grass carp, logperch, and smallmouth bass (Table 3.4).
  
  
• Two white perch (Morone americana) and one white perch X yellow bass (Morone americana X Morone mississippiensis) hybrid were collected in 2007.  This is the fourth sampling season this species or its hybrids have been collected by the LTRMP in Pool 26.

• Mean catch-per-unit-effort and standard error for stratified random and fixed-site sampling for each stratum are shown in Pool 26 tables. Length distributions for selected species of fish are shown in Figures 1 to 17.