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Prepared by:Ron Kegerries 1, Brandon Albrecht 1, Ron Rogers1, W. Howard Brandenburg 2, Adam L. Barkalow 2, Harrison Mohn1, Mark McKinstry3, Brian Healy 4, James Stolberg 5, Emily Omana Smith 4
1 BIO-WEST, Inc.;2 American Southwest Ichthyological Researchers, LLC;3 U.S. Bureau of Reclamation, Upper Colorado Region;
4 U.S. National Park Service;5 Lower Colorado River Multi-Species Conservation Program
Glen Canyon Dam Adaptive Management Program – March 2018
2015 ANNUAL REPORT
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon,Arizona and Nevada
Objectives
• Monitoring the Colorado River Inflow (CRI) – Same methods since 2010
• Determine Razorback Sucker presence and habitat use in Grand Canyon (GC)– Larval and small-bodied fish
community sampling within the GC• Assess reproduction and distribution
– GC telemetry• Explore linkages between Lake
Mead and GCRazorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Colorado River Inflow (CRI)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Photo credit: USBR
2017 Adult Catch (CRI)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Mea
n R
azor
back
Suc
ker C
aptu
res
(Ln[
#fis
h/ho
ur+1
])
Year
Virgin River/Muddy River Inflow AreaEcho BayLas Vegas BayColorado River Inflow
• 12 Razorback Suckers– 5 new, wild (1 was juvenile)– 2 recaps from Overton Arm– 1 sonic-tagged LGC recap
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
2010 2011 2012 2013 2014 2015 2016 2017
Mea
n La
rval
Raz
orba
ck S
ucke
r Ca
ptur
es (L
n[#l
arva
e/lig
ht-
min
ute+
1])
Year
Virgin River/Muddy River inflow areaEcho BayLas Vegas BayColorado River inflow area
2017 Larval Catch (CRI)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
• Active and passive sampling:‒ 6 RBS larvae
‒ 3 FMS larvae
9.05 (5.76-13.9)
8.1 (3.78-16.54)
Echo Bay
Virgin River/Muddy River inflow
Las Vegas Bay
Colorado Inflow
Movement of RBS in Lake Mead
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Overton Arm
Mohn et al. (2016)
Small-bodied and Larval Fish Surveys
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
a~f.1,'l!.1'11E.NT OfJl'll:/N7f/t.
~ ......... ~ --~-
GC Survey Summary (2014–2017)Year Study area Study Period GRTS
SitesImplantedRazorback
Sucker
Larval Razorback
Sucker
2014 100 river milesLava Falls–
Pearce Ferry
Apr–Sep n=40 n=9above Lava Falls
Rapid
n=459
2015 100 river milesLava Falls–
Pearce Ferry
Mar–Sep n=40 n=81
2016 191 river milesBright Angel
Creek–Pearce Ferry
Mar–Sep n=56 n=10Diamond Creek
n=46
2017 191 river milesBright Angel
Creek–Pearce Ferry
Mar–Sep n=56 n=27
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Sampling Localities in Grand Canyon
= GRTS site
River Mile
UT
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Methods
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Larval Fish Sampling• Small fine mesh seine• low velocity habitats• four hauls per site
Small-bodied Fish Sampling• 10’ and 15’ seine• diverse habitats• ~10 hauls per site
Telemetry• Active• Passive (n=20 SURs,
every 10 miles)
Age-0 Monthly Captures
Flannelmouth Sucker (CATLAT)
Bluehead Sucker (CATDIS)
Razorback Sucker (XYRTEX)
Humpback Chub (GILCYP)
Speckled Dace (RHIOSC)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – March
9–17 March 2017 GRTS segments: 54 Effort: 1,993.4 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – April
8–13 April 2017 GRTS segments: 56 Effort: 2,011.6 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – May
19–24 May 2017 GRTS segments: 56 Effort: 2,017.7 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – June
14–19 Jun 2017 GRTS segments: 56 Effort: 1,976.5 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – July
11–17 Jul 2017 GRTS segments: 56 Effort: 1,978.3 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2017 Age-0 Fish Captures – August
16–23 Aug 2017 GRTS segments: 56 Effort: 1,990.6 m2
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Back-calculated Hatching DatesHatch Dates: 23 February–18 May 2017
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Back-calculated Hatching DatesHatch Dates: 23 February–18 May 2017
Mea
n da
ily w
ater
tem
pera
ture
(o C)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
March April May June July August September
Mea
n C
PUE
(Ln[
#/m
2 +1]
Trip Month
Native Nonnative
0.000
0.125
0.250
0.375
0.500
0.625
0.750
0.875
1.000
1.125
88.6
98.7
103.
510
4.8
110.
611
2.8
115.
412
2.2
123.
612
5.1
127.
313
1.0
132.
813
4.8
137.
113
9.6
144.
814
8.9
153.
816
5.0
167.
716
8.6
172.
617
4.8
176.
917
7.3
177.
717
8.5
180.
518
2.0
183.
318
4.5
186.
619
2.5
194.
619
7.0
200.
120
5.0
206.
420
8.8
216.
622
0.1
221.
022
7.1
230.
723
6.7
238.
724
1.9
243.
024
8.7
252.
725
5.2
263.
626
9.0
269.
927
7.4
279.
0
Mea
n C
PUE
(Ln[
#/m
2 +1]
River Mile
Native Nonnnative
2017 Small-bodied Sampling (GC)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Hava
su C
reek
Diam
ond
Cree
k
Shin
umo
Cree
k
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
March April May June July August September
Mea
n C
PUE
(Ln[
#/m
2+1]
Trip Month
Native
Humpback Chub
Bluehead Sucker
Flannelmouth Sucker
Speckled Dace
YOY Sucker
2017 Small-bodied Sampling (GC)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.1688
.610
3.5
109.
211
2.8
122.
212
5.1
131.
013
2.8
134.
413
7.1
144.
014
8.9
165.
016
8.6
174.
817
7.3
178.
217
9.5
182.
018
4.5
192.
519
7.0
205.
020
8.8
220.
122
7.1
236.
724
1.9
248.
725
2.7
263.
626
9.9
279.
0
Mea
n C
PUE
(Ln[
#/m
2+1]
River Mile
Small-Bodied HBC Captures 2017 (all trips combined)
n=93019–282 mm TL
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Above DC Below DC Above DC Below DC Above DC Below DC1992-1995 2004-2006 2014-2016
Perc
ent o
f Cap
ture
Sampling Period and River Segment
Native Nonnative
• Valdez et al. (1995), Ackerman et al. (2005), Kegerries et al. (2014–2017)
Small-bodied Sampling (GC)
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
• Critical to monitor movement and improve sampling efficiency• Since 2013 n=46 sonic tagged fish released
Telemetry-Tagged Fish
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
2010–2016 Movement Patterns
0
50
100
150
200
250
300
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Num
ber o
f Day
s C
onta
cted
Month
CRI
Grand Canyon
• Four types of movement• 70% remain within stocking
habitat
• Most movement occurs during the spring and summer
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
South Cove Lake Mead
Pearce Ferry Rapid Bright Angel Creek
Spencer Creek
Lava Falls
2014-2017Diamond Creek
UpstreamDownstreamUp- and Downstream
Movement Patterns
2017 Science Panel Report• Do not force augmentation (i.e.,
stocking) of Razorback Sucker.
• Continue ongoing work with Razorback Sucker at the Colorado River Inflow Area and western Grand Canyon.
• Expand fish surveys for Razorback Sucker, in the lower Grand Canyon and investigate larval fish to get evidence of spawning and use of river.
• Integrate all habitat, fish, and food base studies in the Grand Canyon and the Colorado River Inflow Area of Lake Mead.
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
Razorback Sucker Conclusions
Razorback Sucker Xyrauchen texanus Research and Monitoring in the Colorado River Inflow Area of Lake Mead and the Lower Grand Canyon, Arizona and Nevada
• All life stages present at the CRI (8th year).• Larvae documented in Grand Canyon downstream of
Havasu Creek.• Native fishes dominate the fish community of the GC.• Movement of Razorback Sucker occurs between Grand
Canyon, CRI, and Lake Mead.• Hypothesize that lentic and lotic habitats cumulatively
facilitate Razorback Sucker recruitment.
---- -·- - -.,
BUREAU OF ~RECLA~~'l\0~
J\T ust>un, _ ol Southwestern --Biology
Amelican Southwest Jchthyologicat Rosoarchcrs, L.L. c.