9559

• UCREFRP Catalog Number: 9559
• Author: Martinez, A. M.
• Title: An Evaluation of Nonnative Fish Control Treatments in Ponds along the Colorado and Gunnison Rivers, 1996-2002.
• USFW Year: 2004.
• USFW - Doc Type: 18/19,
• Copyright Material: NO

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Table 5. The number of pond sites examined between 1996 and 2002 along the Colorado
River between Rifle and the Colorado/Utah state line and along the Gunnison River between
Austin and the confluence with the Colorado River. "Public" refers to pond sites that are
open to the public while "municipal" pond sites are owned by a government entity, but are
not open to the public such as water/sewage treatment ponds.
Year Colorado Riv er G unnison Riv er Total
Private Public Municipal Private Public Municipal
1996 2 1 3
1997 2 15 1 1 1 20
1998 1 24 2 2 6 2 37
1999 96 18 27 36 9 186
2000 39 5 18 62
2001 5 5 2 4 4 20
2002 1 1
Total 144 69 50 44 6 16 329
Implementation of a monetary landowner incentive package facilitated access to
private property and expedited nonnative fish reclamation efforts. Forty-five (59°x) of
the 76 private landowners who provided access chose to participate in the NNFC
program through the incentive package, while the remaining 31 private landowners
chose to participate without receiving any incentive money. A total of 39,200 incentive
dollars were paid to the 45 private landowners as an access fee for fish sampling and/or
NNFC. Eight of the 45 landowners were paid an access fee for both fish sampling and
NNFC, while nine of the 45 landowners allowed additional access for NNFC without
receiving additional access fees beyond the initial incentive fee. The remaining 28
landowners either chose to not participate in NNFC after their ponds were sampled, or
their ponds did not appear to pose a threat to native fishes and NNFC was not pursued.
A total of 93 private ponds were accessed for sampling through the incentive
program. Nonnative fish were controlled in 49 of the 93 privately-owned ponds. The
total area of the 93 sampled ponds was 363.3 surface acres (SA). The subset of these
sampled ponds that were controlled, 49 ponds, totaled 204.6 SA. The total incentive
costs to sample and control nonnative fish in these ponds were $31,200 ($86/SA) and
$8,000 ($39/SA), respectively. The average cost per SA for control vs sampling was
less because nine private landowners that participated in the incentive package were
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