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Last modified
8/11/2009 11:32:57 AM
Creation date
8/10/2009 4:53:29 PM
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UCREFRP
UCREFRP Catalog Number
9295
Author
Chart, T. E., D. P. Svendson and L. Lentsch.
Title
Investigation of Potential Razorback Sucker (Xyrauchen texanus) and Colorado Squawfish (Ptychocheilus lucius) Spawning in the Lower Green River 1994 and 1995.
USFW Year
1997.
USFW - Doc Type
Moab, Utah.
Copyright Material
NO
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<br />GREEN RIVER LIGHT TRAPS: 1994 and 1995 <br />NNC (0.39%) <br />CP (0.05%) RZ (2.1696) <br /> <br /> BH (5.29%) <br />FH (21.71 %) C'' (0'0096) <br /> CH (0.93%) <br /> 1994 SD (1.76%) <br />n 2041 ' <br /> RS (53.65%) <br /> RZ (0.33%) <br /> FM (15.51%) <br /> BH (2.9096) <br /> <br />1995 CS (0.91 %) <br /> CH (0.00%) <br /> ~t=1Z06 SD (0.33%) <br />NNC (58.04%) RS (14.93%) <br /> FH ro.oo%) <br /> ss (7.os%) <br /> cP (o.oo%) <br />Figure 6. Relative abundance offish collected in larval light traps in the Green River, 1994 and <br />1995. Summarizes collections near the mouth of the San Rafael and near Millard Canyon. RZ = <br />razorback sucker„ FM = flannelmouth sucker, BHS = bluehead sucker, CS =Colorado <br />squawfish, CH = Gila spp., SD =speckled dace, RS =red shiner, FH=fathead minnow, SS = <br />sand shiner, CP =common carp, and NNC =non-native cyprinid. <br />In 1995, larval-production as indexed by light trap catch was down for all species. A total of four <br />(4) larval razorback suckers were collected in the lower Green River, two near the San Rafael <br />confluence (RM 97.0), and two near Anderson Bottom (RM 33.5). Collection dates ranged from <br />May 31st to June 30th, and total lengths ranged from 11.3 mm to 12.8 mm (see Table 1 and <br />Figure 4 and 5). Flannelmouth suckers (n=187) comprised 15.5% of the catch with the bulk of <br />them collected early in the sampling period (peak date May 03). Non-native cyprinids did not <br />become abundant in the samples until relatively late in the year, July 11 and 19. <br />DRAFT' 13 <br />
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