9715

• UCREFRP Catalog Number: 9715
• Author: Ward, D.
• Title: Removal and quantification of Asian tapeworm from endangered cyprinid fishes using Praziquantel.
• USFW Year: 2005.
• USFW - Doc Type: Arizona Game and Fish Department.
• Copyright Material: NO

Table 5. Known examinations of humpback chub in the Little Colorado River and incidence of
tapeworm infestation.

Date
1981
1989

# of fish examined Sizes (mm)
26 unreported
15 21-56
21 <100
24 >100
2 subadult
40 <100
18 >100
115 <100
8 >100
87 <100
12 >100
1993 62 <100
1993 1 >100
1995 168 >250
1999 38 <150
2000 60 <150
2001 18 <150
2005 11 <150
2005 19 >150
1First incidence of Asian Tapeworm reported
2Data from stomach flushing

11990

1991

1992

181
IIJ 180
E
L-
0 35
~
CD
Q. 30
C'lI
-
.... 25
0
L-
CD 20
.a
E 15
::::J
Z
10
5
0
0

% of infection
o
o
o
o
100
92.5
44.4
23.5
37.5
46
66.7
1.6
100
24
76.3
84
100
18.2
47.4

Source
Kaeding and Zimmerman 1983
Angradi et al. 1992
Clarkson et al. 1997
Clarkson et al. 1997
Minckley 1996
Angradi et al. 1992, Clarkson et al. 1997
Angradi et al. 1992, Clarkson et al. 1997
Clarkson et al. 1997
Clarkson et al. 1997
Clarkson et al. 1997
Clarkson et al. 1997
Clarkson et al. 1997
Clarkson et al. 1997
Valdez and Ryel1997
Hoffnagle et al. 2000
Choudury et al. 2004
Cole et al. 2002
This Study
This Study

.
- .a.._ ·

50

100

150

Total Length (mm)

200 250

.

.

.

.

.
.

1

.

.

..

300' 350 400 450

Figure 1. Asian tapeworm removed from Humpback chub in the Little Colorado River in May
of 2005 using Praziquantel bath treatments.