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Fish Reports

2006 Report

La Grange Pool, Illinois River 2006 Fish Collection Summary

This report is a bullet summary of the Long Term Resource Monitoring Program's (LTRMP) fish collection efforts conducted by the Havana Field Station on La Grange Pool, Illinois River during 2006. Information on changes in fish catch over all years can be obtained from the Graphical Fish Database Browser.

• 240 fish collections were conducted using six gear types (Table 2.6).
  
  
• Side channel border received the most sampling effort; however, main channel habitat collected the most fish 11,427. Side channels collect 9738 fish followed by backwater-shoreline (7914) and tailwater zones (2198). (Table 2.6).
  
  
• In 2006, water levels remained below flood stage during April and early May (typically the peak flood period) and remained relatively stable and low from June until September. Water levels became less stable during time period three but did not reach flood stage. These spikes did not affect sample allocations. All gear allocations were completed for the two sampling periods (Table 2.6; Figure 1.6).
  
  
• 31,277 fish were collected representing 55 species and 3 hybrids (Table 3.6).
  
  
• Historical fish distribution records for La Grange Pool of the Illinois River (Smith 1979) document 115 fish species from La Grange Pool.
  
  
• The LTRMP species list for La Grange Reach, 1990–2006 contains 89 species and 9 hybrids (Table 3.6).
  
  
• Seven non-native species and two non-native hybrids were collected in 2006. Within all years combined, 9 non-native species and 3 non-native hybrids have been collected in La Grange Reach with LTRMP fish sampling.
  
  
• No Federal or state threatened or endangered species have been collected by LTRMP monitoring in La Grange Pool since 1990.
  
  
• Mean catch-per-unit-effort and standard error for stratified random and fixed-site sampling for each stratum are shown in La Grange Pool tables. Length distributions for selected species of fish are shown in Figures 1 to 17.
  
  
  

  
  

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Page Last Modified: April 17, 2018