9540

• UCREFRP Catalog Number: 9540
• Author: Christopherson, K., G. J. Birchell and T. Modde.
• Title: Larval Razorback Sucker and Bonytail Survival and Growth in the Presence of Nonnative Fish in the Stipprup Floodplain.
• USFW Year: 2004.
• USFW - Doc Type: Salt Lake City, UT.
• Copyright Material: NO

both the high and low-density enclosures was dramatically lower with densities never exceeding
~ 100 z/1 in the spring. Whereas zooplankton densities were increasing outside the fish enclosures
in early July, zooplankton densities within the fish enclosures continued to decline. In July,
zooplankton densities averaged 7.6 z/1 and 5.6 z/1 in the high and low-density enclosures,
~ respectively, but averaged 86.3 z/1 outside the fish enclosures (Figure 2.). These zooplankton
densities reflect the relatively few fish outside the enclosures as compared to inside the
enclosures.
June 11-12 June 2426
r

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P 0
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to 0
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~ N M O~ I~ ~ ~~ ~ M r O
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Figure 1. Water quality parameters measured in the Stirrup floodplain during the spring and
summer of 2002. Blue triangle =temperature, purple line = pH, and red circles = dissolved
f oxygen.
8