Volume 2010, Issue 17
| August 5, 2010 |
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Ecological Society of America:
Aug. 1-6
American Fisheries Society Meeting:
Sept. 12-16
Oceans 2010
MTS/IEEE
Sept. 20-23
Delta Science Conference: Sept. 27-29 |
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Photo by FISHBIO.
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Key Highlights
Calaveras
River Juvenile Migration Monitoring. The 2010 Calaveras River rotary screw
trap (RM 28) sampling season ended on July 15. A total of 2,818 O. mykiss were captured during the season.
Mokelumne
River Juvenile Migration Monitoring. Monitoring at the Mokelumne
River rotary screw traps ended on July 9 at Vino Farms (RM 54) and July 13 at
Golf (RM 38) and Woodbridge (RM 38).
Stanislaus
River Juvenile Migration Monitoring. The 2010 Oakdale rotary
screw trap (RM 40) sampling season ended on June 25, with
a
total of 36,823 Chinook salmon captured this season. The 2010 Caswell State
Park rotary screw trap (RM 8) sampling season ended on June 17, with a total of
1,104 Chinook salmon captured this season.
Tuolumne
River Juvenile Migration Monitoring. The Tuolumne
River rotary screw trap sampling at Waterford (RM 30) ended on June 11, witha total of 2,347 Chinook salmon
captured this season. The Tuolumne
River rotary screw trap sampling at Grayson (RM 5) ended on June 17,
with a total of 52 Chinook salmon captured this season.
Weir
Monitoring. The Stanislaus River Weir sampling season ended on June 23.
During the season, a total of 1,304 Chinook salmon were detected passing
upstream of the weir.
San Joaquin River
Conditions. San Joaquin River flows at Vernalis
decreased from 3,918 cfs to 1,335 cfs. Water temperatures in the San Joaquin
River ranged between 72.9�F and
78.0�F and average daily
dissolved oxygen (DO) ranged between 8.7 mg/L and 14.1 mg/L.
Delta Exports. Combined
total exports (state and federal pumps) fluctuated during the reporting
period ranging from 5,040 cfs to 10,795 cfs.
We encourage subscribers to contribute any relevant information for future issues of the newsletter (e.g., additional monitoring studies, announcements of upcoming meetings and events, etc). If you would like to contribute, please contact Chrissy Sonke. |
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2009/10 Calaveras River Juvenile Migration Monitoring
The
Calaveras River rotary screw trap at Shelton
Road (RM 28) sampling season ended July 15. The trap sampled 139 days
between November 10, 2009 and July 15, 2010. A total of 2,818 O. mykiss were captured during the
sampling season with daily catch ranging between 0 and 360 O. mykiss (Figure 2). Most of the O. mykiss captured, (n=1,184) were YOY (<100 mm). There were
also many (n=454) Age 1+ (100-299 mm) and an Adult (>300 mm) captured. Average
forklengths and weights are provided in Table 1 for that were O. mykiss measured.
No Chinook salmon were captured this
season. Since the trap first began sampling in 2002, there were captures of 5,943 and 2,124 Chinook salmon in 2006 and 2007, respectively.
A
total of 13 non-salmonid species of fish were captured in the traps during the
sampling season including, but not limited to, Sacramento sucker (n=13,775),
YOY black bass (n=157), and Sacramento pikeminnow (n=35; Figure 1).
Table 1.
Biosampling data for O. mykiss captured
and measured at Shelton Road between June 28 and July 15, 2010. Parentheses
indicate range.
Figure 1. Relative
catch of all non-salmonid species captured at Shelton Road between November
9, 2009 and July 15, 2010.
Instantaneous
temperatures recorded at the trap this season ranged from 40�F to 64�F (Figure
3), and turbidity ranged from 0.05 NTU to 25.10 NTU. Daily average flow
fluctuated between 18 cfs and 210 cfs at New Hogan Dam (NHG), between 0 cfs and
1,239 cfs at Bellota (MRS), and 0 cfs and 542 cfs at Cosgrove Creek (COS).
Figure 2. Daily O. mykiss catch at Shelton Road and Calaveras River
flow recorded by New Hogan Dam (NHG) and Cosgrove Creek (COS) combined, between
November 1, 2009 and July 15, 2010.
Figure 3. Daily O. mykiss catch at Shelton Road and Calaveras River temperature recorded instantaneously
at trap location between November 1, 2009 and July 15, 2010.
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2009/10 Mokelumne River Juvenile Migration Monitoring
The Mokelumne River rotary screw trap at Vino Farms (RM 54) sampling season ended on
July 9. A total of seven Chinook salmon were captured during the reporting
period, increasing the season total to 8,404.
Two O. mykiss were captured at
Vino Farms during the report period
increasing the season total to 54 (Note: 26 of the O. mykiss had a clipped adipose fin,
indicating hatchery origin).
Between December 1, 2009 and July 14, 2010 average
daily flows from Camanche Reservoir (CMN) fluctuated between 329
cfs and 1,453 cfs (Figure 4). Instantaneous temperature ranged between 48.6�F and 58.3�F and instantaneous turbidity ranged between
1.38 NTU and 10.10 NTU.
Figure 4. Daily Chinook catches at Vino
Farms and Mokelumne River flow recorded by Camanche Reservoir (CMN), between
December 1, 2009 and July 14, 2010. The Mokelumne River rotary
screw trap at Golf (RM 38) sampling season ended on July 13. A total of eight
Chinook salmon were captured increasing
the season total to 440 (Figure 5). Sixteen O. mykiss were
captured at Golf during this reporting period, increasing the season
total to 730
(Note: 685 of the O. mykiss had
a
clipped adipose fin, indicating hatchery origin).
Between December 1, 2009 and July 14, 2010 average daily flow
recorded at Woodbridge (WBR) fluctuated between 107 cfs and 1,134
cfs. Instantaneous temperature ranged between 48.2�F and 63.5�F and
instantaneous turbidity ranged between 1.63 NTU and 13.00 NTU. Figure 5. Daily Chinook catches at Golf and Mokelumne
River flow recorded at Woodbridge (WBR), between December 1, 2009 and July 14,
2010. The Mokelumne River rotary
screw trap at Woodbridge (RM 38)sampling season ended on July 13. Twenty-eight Chinook salmon were captured during the reporting period increasing
the season total to 403 (Figure 6). Thirty O. mykiss were
captured
at Woodbridge during this reporting period increasing the season total
to 170 (Note:
81 of the O. mykiss had a
clipped
adipose fin, indicating hatchery origin). Between April 14 and July 14, 2010 average daily flows
recorded at Woodbridge (WBR) fluctuated between 264 cfs and 1,134
cfs. Instantaneous temperature ranged between 54.7�F and 64.2�F and
instantaneous turbidity ranged between 1.84 NTU and 4.21 NTU.
Figure 6. Daily Chinook
catches at Woodbridge and Mokelumne River flow recorded at Woodbridge (WBR),
between April 14 and July 14, 2010.
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2010 Stanislaus River Juvenile Migration Monitoring
The Stanislaus River rotary screw trap at Oakdale (RM 40) discontinued sampling on June 25. The
trap sampled 155 days between January 7 and June 25. A total of 36,823 juvenile
Chinook salmon were captured during the sampling season with daily catch ranging
between 0 and 7,122 Chinook salmon.
A total of
fourteen O. mykiss were captured at
Oakdale during the sampling season.
A total
of 22 non-salmonid species of fish were captured in the traps during the sampling season including, but not limited to, prickly
sculpin (n=291), Sacramento sucker (n=260), and Sacramento pikeminnow (n=201;
Figure 7).
Figure
7. Relative catch of all non-salmonid species captured at Oakdale between
January 7 and June 25, 2010 (Note: Data excludes lamprey catch).
During the season, instantaneous
temperature recorded at the trap ranged from 46.9�F to 64.9�F, and turbidity
ranged from 0.03 NTU to 38.60 NTU. Daily average flow during the sampling
season ranged from 199 cfs to 1,365 cfs at Goodwin Dam (GDW) and 215 cfs to 1,266
cfs at Ripon (RIP) (Figure 8).
Eight trap efficiency
experiments were conducted this season with naturally spawned juvenile Chinook
salmon marked caudal fin green (CFG) during the trapping season (Table 2).
Table
2. Trap efficiency experiments conducted at Oakdale between January 7 and June
25, 2010.
Figure 8. Daily Chinook
salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam (GDW)
and Ripon (RIP), 2010.
The
Stanislaus River rotary screw trap at Caswell State Park (RM 8) discontinued sampling on June 17. A total of 1,104 Chinook salmon were captured during the sampling
season.
One O. mykiss was captured this season.
No trap efficiency
experiments were conducted due to insufficient daily catch.
During the season, instantaneous
temperature recorded at the trap ranged from 46.8�F and 73.8�F, and turbidity
ranged from 0.42 NTU to 41.70 NTU. Daily average flow at Ripon (RIP) ranged
from 215 cfs to 1,266 cfs.
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2010 Tuolumne River Juvenile Migration Monitoring
The 2010 Tuolumne River rotary screw trap sampling at Waterford (RM 30)
ended June 11. The trap sampled 158 days between January 5 and June 11. A total
of 2,347 juvenile Chinook salmon were captured during the sampling season with
daily catch ranging between 0 and 112 Chinook salmon.
No O. mykiss were captured this season.
A total
of 17 non-salmonid species of fish were captured in the traps during the sampling
season including, but not limited to, Sacramento pikeminnow (n=401), white
catfish (n=367), and bluegill sunfish (n=177; Figure 9).
Figure
9. Relative catch of all non-salmonid species captured at Waterford
between January 4 and June 11, 2010 (Note: Data excludes lamprey catch).
During the season, instantaneous
temperature taken at the trap ranged from 44.0�F to 60.9�F, and turbidity
ranged from 0.08 NTU to 33.30 NTU. Daily average flow records from La Grange
(LGN) ranged from 221 cfs to 5,520 cfs (Figure 10).
Eleven trap efficiency
experiments were conducted this season using naturally spawned juvenile Chinook
salmon marked caudal fin orange (CFO; Table 3).
Table
3. Trap efficiency tests conducted at Waterford between January 4 and June 11,
2010.
Figure 10. Daily Chinook salmon catch at Waterford and
Tuolumne River flow recorded by La Grange (LGN) and Modesto (MOD), 2010.
The 2010 Tuolumne River rotary screw trap sampling at Grayson (RM 5) ended June 17. The trap sampled 160 days between January 6 and June 17. A total
of 52 juvenile Chinook salmon were captured this season with daily catch
ranging between zero and six Chinook salmon.
No O. mykiss were captured this season.
Trap efficiency releases were not conducted this season due to
insufficient daily catch.
During
the season, instantaneous temperature taken at the trap ranged from 46.5�F to 68.3�F,
and turbidity ranged from 0.24 NTU to 80.70 NTU. Daily average flow at Modesto
(MOD) ranged from 271 cfs to 5,620 cfs (Figure 12).
A total of 21 non-salmonid species of fish were captured in the traps
during the sampling season including, but not limited to, white catfish
(n=565), redear sunfish (n=165), and bluegill sunfish (n=119; Figure 11).
Figure
11. Relative catch of all non-salmonid species captured at Grayson
between January 5 and June 17, 2010 (Note: Data excludes lamprey catch).
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2009/10 Stanislaus River Weir Monitoring
The
Stanislaus River Weir sampling
season ended on June 23. A total of 1,303 Chinook salmon were detected passing
upstream of the weir this season. Fall-run Chinook salmon (Table 4; n=1,271) occur before January 31 and winter-run/spring-run Chinook salmon (Table 5; n=32) are fish detected after February 1.
A
total of ten O. mykiss were detected
passing upstream of the weir this season.
During the season, instantaneous temperature recorded at the weir ranged
from 44.6�F to 74.3�F, and turbidity ranged from 0.05 NTU to 42.80 NTU. Daily
average flow during the sampling season ranged from 199 cfs to 1,504 cfs at
Goodwin Dam (GDW) and 213 cfs to 1,307 cfs at Ripon (RIP).
Table 4. Net passage counts
for fall-run Chinook salmon between September 9, 2009 and January 31, 2010 at the Stanislaus
River Weir.
 Table 5.
Net passage counts
for winter-run/spring-run Chinook salmon between January 31 and June 23,
2010 at the Stanislaus
River Weir.
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Between June 28 and July 21 flows in the San
Joaquin River at Vernalis decreased from 3,918 cfs to 1,335 cfs (Figure 13).
Water temperatures in the San Joaquin River fluctuated between 72.9�F and 78.0�F at Vernalis; between 66.7�F and 80.1�F at Mossdale; and between 74.8�F and 80.2�F at Rough 'n Ready Island (Figure 14).
Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated between
5.3 mg/L and 7.1 mg/L in the deep water ship channel (measured at Rough 'n
Ready Island) and fluctuated between 8.7 mg/L and 14.1 mg/L at Mossdale (Figure
15).
Figure
13. San Joaquin River flow at Vernalis, from July 1, 2009 through July 21, 2010.
Figure
14. San Joaquin River daily average water temperature at Vernalis, Mossdale,
and Rough 'n Ready, from July 1, 2009 through July 21, 2010.
Figure
15. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n
Ready, from July 1, 2009 through July 21, 2010.
Water temperature in the San Joaquin River generally
increased between January and July. Water temperature during this time period
has been relatively similar from 2007 to 2010; however, it appears that some
fluctuation occurs during the months of May and June (Figure 16).
 
Figure
16. San Joaquin River daily average water temperature at Rough n' Ready Island,
Mossdale, and Vernalis, January through July, (2007-2010).
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Delta Exports
Combined total exports (state and federal pumps) fluctuated during the reporting period ranging from 5,040 cfs to
10,795 cfs. Mean daily
pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 2,396
cfs to 6,697 cfs. Mean daily pumping at the C.W. Jones Pumping Plant (federal
pumps previously known as Tracy Pumping Plant) ranged from 2,644 cfs to 4,300
cfs during the reporting period (Figure 17).
Figure
17. Daily exports at the Federal and State pumping stations, from July 1, 2009
through July 21, 2010.
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