Upper Midwest Environmental Sciences Center
La Grange Pool, Illinois River 2004 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 2004. Information on changes in fish catch over all years can be obtained from the Graphical Fish Database Browser.
- 360 fish collections were conducted using six gear types (Table
2.6).
- Side channel border received the most sampling effort (Table
2.6).
- 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. All gear allocations were completed for all three sampling
periods (Table 2.6; Figure
1.6).
- Because of budget constraints, Peoria Lock and Dam was the only tailwater
site sampled in 2003 and 2004 (Table 2.6). From
1995 until 2002, La Grange Lock and Dam tailwater site was sampled and
data from both tailwater sites were combined for analysis.
- 80,059 fish were collected representing 64 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 total is 87 species and 9 hybrids (Table 3.6).
- 9 nonnative species (and 3 nonnative hybrids) have been collected
in 2004, which includes the first collection of round goby, Neogobius
melanostomus.
- No Federal or state threatened or endangered species have been collected
by LTRMP monitoring of La Grange Pool.
- 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.
Content manager: Jennie Sauer
Page Last Modified: April 17, 2018