9488

• UCREFRP Catalog Number: 9488
• Author: Mueller, G. A., J. Carpenter, P. C. Marsh and C. O. Minckley.
• Title: Cibola High Levee Pond Annual Report 2003.
• USFW Year: 2003.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

A --

. Table 6. Predation rates (x::l: SE) in single-prey (RZB'i>-) and mixed-prey (RZB +
FHM) treatments.

Number of
Predator treatment tanks
Razorback larvae 10-16 mm

Percent predation
(lnstantaneou's predation rates **)

Razorback larvae Fathead minnows

Red shiner 4RZB 87.5::l: 9.5
(0.168::l: 0.018)
Bonytail 4RZB 88.8 ::l: 2.4
(0.185::1: 0.005)
Lepomis sp. 5RZB 64.0::1:17.1
(0.133 ::l: 0.036)
Rainbow trout 4RZB 100::1: 0.0
YC-1 (0.357::1: 0.0)
Bullfrog tadpole 5RZB 7.0::l: 3.4
(0.015 ::l: 0.007)
Yellow bullhead 4RZB 98.75::1: 1.3
(0.274::1: 0.003)
Razorback larvae 18-28 mm
Rainbow trout 6RZB 100::l: 0.0
Adult (0.455 ::I: 0.0)

18.3 ::I: 4.4
(0.015::l: 0.003)

55.0::l: 35.0
(0.022::l: 0.014)

50.0 ::l: 7.6
(0.028 ::l: 0.004)

63.3::l: 14.5
(0.018::1: 0.004)

58.0 ::I: 4.4
(0.099 ::I: 0.006)

66.7::1: 13.6
(0.050::l: 0.006)

* RZB = razorback sucker, FHM = fathead minnow
** number of fish consumed/predator/hour, based on duration given in Table 4

Razorback larvae 30-50 mm
Bluegill

3 RZB

2 RZB + FHM

Channel catfish

3 RZB

3 RZB + FHM

Largemouth bass

5 RZB

6 RZB + FHM

5.0::1: 5.0
(0.002::l: 0.003)

13.3 ::l: 3.3
(0.004::l: 0.001)

63.3::1: 7.2
(0.051 ::l: 0.003)

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