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<br />Nonnative Fish
<br />The nonnative fish introduced into the enclosures reproduced and the populations quickly
<br />grew to very large numbers (Table 6 through Table 8).
<br />
<br />The estimate for the black bullhead, green sunfish and fathead minnow assemblage ~
<br />exceeds 40,000 for both enclosures (Table 9). The nonnative fish predators were well
<br />represented in the study. Population estimates for carp and red shiner were not calculated
<br />because very few individuals of these species were captured. ~
<br />Table 6. Capture data for black bullheads, green sunfish and fathead minnows in the low-
<br />density enclosure at The Stirrup floodplain wetland, Green River (RM 276.0)
<br />during each sampling period, July and August 2002. ~
<br />Black bullheads Green sunfish Fathead minnows
<br />Number Cumulative Number Cumulative Number Cumulative
<br />Date captured total captured total captured total
<br />July 31, 2002 2,731 0 7,702 0 4,024 0 ~
<br />August 2, 2002 873 2,731 5,209 7,702 2,878 4,024
<br />August 7, 2002 541 3,604 3,604 12,911 2,285 6,902
<br />August 9, 2002 280 4,145 1,805 16,515 2,752 9,187
<br />Totals 4,425 18,320 11,939
<br />
<br />Table 7. Capture data for black bullheads, green sunfish and fathead minnows in the high-
<br />density enclosure at The Stirrup floodplain wetland, Green River (RM 276.0)
<br />during each sampling period i n July and August 2002.
<br />
<br />Black bullheads Green sunfish Fathead minnows
<br />Date Number Cumulative Number Cumulative Number Cumulative
<br />captured total captured total captured total
<br />July 30, 2002 2,821 0 4,785 0 2,797 0 ~
<br />August 1, 2002 83 2,821 5,093 4,785 652 2,797
<br />August 6, 2002 40 2,904 3,744 9,878 2,313 3,449
<br />August 8, 2002 4 2,944 2,392 13,622 1,742 5,762
<br />August 13, 277 2,948 1,760 16,014 732 7,504 ~
<br />2002
<br />Totals 3,225 17,774 8,236
<br />14 ~
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