lees ferry fish monitoring
DESCRIPTION
Lees Ferry Fish Monitoring. Lees Ferry Monitoring. How do Glen Canyon Dam operations influence the rainbow trout fishery?. Annual sampling Electrofishing Abundance, Size Angler Surveys Catch rates. Mean peak discharge = 18,823 ± 2,518 cfs Mean discharge = 12,816 ± 683 cfs. - PowerPoint PPT PresentationTRANSCRIPT
Lees Ferry Fish Monitoring
Lees Ferry Monitoring
• Annual sampling
• Electrofishing
• Abundance, Size
• Angler Surveys
• Catch rates
• How do Glen Canyon Dam operations influence the rainbow trout fishery?
Modified low fluctuating flows1991-2010
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
6000
8000
10000
12000
14000
16000
18000
Mean peak discharge = 18,823 ± 2,518 cfsMean discharge = 12,816 ± 683 cfs
1996-HFE
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
0
10000
20000
30000
40000
50000
Max-45,600 cfs Mean-15,235 ± 529 cfs
2000-LSSF
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
5000
10000
15000
20000
25000
30000
35000
Max-30,900 cfsMean- 8,355 ± 22.4 cfs
Jan Feb Mar Apr May
Dis
char
ge (c
fs)
5000
7500
10000
12500
15000
2003-TSF
2004-TSF
Jan Feb Mar Apr May
Dis
char
ge (c
fs)
5000
7500
10000
12500
15000
2004-HFE
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
5000
10000
15000
20000
25000
30000
35000
40000
45000
Max-41,900 cfsMean- 11,789 ± 395 cfs
2005-TSF
Jan Feb Mar Apr May
Dis
char
ge (c
fs)
5000
7500
10000
12500
15000
2008-HFE
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
5000
10000
15000
20000
25000
30000
35000
40000
45000
Max-42,500 cfsMean- 12,830 ± 326 cfs
2011-EqF
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
12000
14000
16000
18000
20000
22000
24000
26000
28000
Max-26,200 cfs2011 Mean- 19,326 ± 380 cfsMay-Aug Mean-24,280 ± 257 cfs
Year
1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Cat
ch (f
ish/
min
)
0
3
6
9
12
15
18
• 1991-2010 - 3.1 ± 0.52 fish/min• 2011 – 6.9 ± 1.35 fish/min
1996 HFE
2011 EqF2008HFE
2004 HFE
2003-2005TSF2000 LSSF
Year1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Rai
nbow
trou
t <15
2 m
m (f
ish/
min
.)
0
2
4
6
8
10
12
14Lees Ferry Standardized Monitoring
Juveniles
Year1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Rai
nbow
trou
t 305
-406
mm
(fis
h/m
in.)
0.0
0.5
1.0
1.5
2.0Lees Ferry Standardized Monitoring
306-405 mm
306-
405
Year1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Rai
nbow
trou
t >40
5 m
m (f
ish/
min
.)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4Lees Ferry Standardized Monitoring
>405 mm
2011-EqF2008-HFE
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
12000
14000
16000
18000
20000
22000
24000
26000
28000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Dis
char
ge (c
fs)
5000
10000
15000
20000
25000
30000
35000
40000
45000
Sampling Date
1/07 7/07 1/08 7/08 1/09 7/09 1/10 7/10 1/11 7/11 1/12
Cat
ch (f
ish/
min
)
0
2
4
6
8
10
12
14
16Rainbow trout <152 mm
2008 HFE2011 EQ
Sampling Date
1/07 7/07 1/08 7/08 1/09 7/09 1/10 7/10 1/11 7/11 1/12
Cat
ch (f
ish/
min
)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
2008 Cohort
2008 HFE 2011 EQ
Rainbow trout <152 mm
Year
1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Tota
l len
gth
(mm
)
100
150
200
250
300
350
400Average total length by year
Year
1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011
Angl
er C
PUE
(fish
/hr)
0.0
0.5
1.0
1.5
2.0
Lees Ferry Creel1991-2011
265 ± 5 mmn = 2,815
Perc
ent c
atch
0
5
10
15
201992 1991-2011
241 ± 3 mmn = 3,805
1998 1991-2011
267 ± 5 mmn = 1,246
Length (mm)
0 100 200 300 400 500 600
Perc
ent c
atch
0
5
10
15
202006 1991-2011
147 ± 3 mmn = 6,100
Length (mm)
0 100 200 300 400 500 600
2011 1991-2011
Low Angler Catch Rate High Angler Catch Rate
1.4 fish/hr0.4 fish/hr
0.6 fish/hr 1.5 fish/hr
Total Captured Native Species
Flannelmouth sucker 334Bluehead sucker 4Speckled dace 1
Cold-water NonnativeBrown trout 43Brook trout 12
Warm-water NonnativeCommon carp 180Walleye 12Channel catfish 5Green sunfish 3Striped bass 2Smallmouth Bass 2
Red shiner 1
Additional species captured during sampling
Flannelmouth suckern = 334
Per
cent
cat
ch
0
5
10
15
20
Brown troutn = 43
Total length (mm)
0 100 200 300 400 500 600 700 800
Per
cent
cat
ch
0
2
4
6
8
10
12
Walleyen = 12
Common carpn = 180
Total length (mm)
0 100 200 300 400 500 600 700 800
Native Fish in the Tailwater to Glen Canyon Dam
Mainstem Fish Monitoring
Rainbow trout
Year
2000 2002 2004 2006 2008 2010 2012
Mea
n C
PUE
(fish
/hr)
0
20
40
60
802011
N = 3,501
Total length (mm)
0 100 200 300 400 500 600
Cou
nt
0
100
200
300
400
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
50
100
150
200
Rainbow trout
2000-2011
GCD
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
50
100
150
200
Rainbow trout
2000-2011
GCD
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
50
100
150
200
250
300
350
Rainbow trout
6-fold decrease in CPUE from RM 58 63
GCD
Year
2000 2002 2004 2006 2008 2010 2012
Mea
n C
PUE
(fish
/hr)
0
2
4
6
8
10
12
14
16
182011
N = 420
Total length (mm)
0 100 200 300 400 500 600
Cou
nt
0
10
20
30
40
50
60
Brown trout
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
5
10
15
20
25
Brown trout
2000-2011
GCD
Common carp
Year
2000 2002 2004 2006 2008 2010 2012
Mea
n C
PUE
(fish
/hr)
0
1
2
3
4
5
6
72011
N = 129
Total length (mm)
0 100 200 300 400 500 600
Cou
nt
0
2
4
6
8
10
12
14
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
2
4
6
8
10
Common carp
GCD
2000-2011
Year
2000 2002 2004 2006 2008 2010 2012
Mea
n C
PUE
(fish
/hr)
0
10
20
30
40
50
60
702011
N = 3,268
Total length (mm)
0 100 200 300 400 500 600
Cou
nt
0
50
100
150
200
250
300
Flannelmouth Sucker
Reach 3
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
20
40
60
80
100
120
Flannelmouth Sucker
GCD
2000-2011
Bluehead Sucker
Year
2000 2002 2004 2006 2008 2010 2012
Mea
n C
PUE
(fish
/hr)
0
1
2
3
4
52011
N = 160
Total length (mm)
0 100 200 300 400 500 600
Cou
nt
0
2
4
6
8
10
12
14
Bluehead Sucker
Reach 3
River Mile0 20 40 60 80 100 120 140 160 180 200 220 240 260
Mea
n C
PUE
(fish
/hr;
MC
X10
00)
0
2
4
6
8
10
GCD
Fish Management?• Vision
– DFC… Desired Future Conditions– ORV… Outstanding and Remarkable Values
• Compromise– Do you want big fish or a lot of fish?– Fish are not the only resource being managed for downstream of GCD
• Feasibility– Fiscal– Legal– Logistical– Political
Fish Management?• Implementation (a few tools)
– Add fish• Translocation• Augmentation• Stocking
– Remove Fish• Mechanical Removal• Chemical Removal• Change in regulations
– Habitat manipulation• Advantageous or disadvantageous for certain species
– Flows– Temperature– Sediment– Food base
• Feasibility
Fish Management?• Uncertainty/Patience
– Adaptive management• Utilize best available information to design experiments to drive
resource towards desired condition• Experiment• Monitor resource/resources• Analyze data and compare current resource/resources to that of
desired condition• Go back to step 1 as necessary to reach desired conditions • Continue to monitor
• Feasibility
• Public Outreach– Throughout the process