9295

• 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

Colorado squawfish
During 1994 a total of 46.3 trammel net hours were accumulated at Millard~anyo
In 1995, a total of 32.1 net hours were accumulated, again in late Ju No Colt
were collected in 1994. Six juvenile Colorado squawfish were caught in
7) ranging in size from 230 to 250 mm total length. The l~llard Canyon reach was
in late June.
ado squawfish'
1995 (Figure
~a~1ed with
electrofishing (effort = 3.14 hours) June 28-30, 1995. Fourteen juvenile squawfish (TL ran
100-321 mm) were collected. Other species collected in decreasing order of abundance were:
common carp, channel catfish, flannelmouth sucker, bluehead sucker, and black bullhead. Flows
were too low to access the site in 1994 during the presumed spawning time.
No larval or young of the year Colorado squawfish were collected during 1994 in this
investigation on the Green River. In 1995, 11 larval Colorado squawfish were collected in this
study, however all were found near the confluence of the San Rafael River (RM 97.0). No larval
or young of the year fish were found in the lower 30 miles of the Green River.
Figure 7. Trammel net catch (fish per hour) on the lower Green River near Nrllard Canyon (RM
33.5; 1994-1995
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DRAFT 14