Volume 2010, Issue 16
| July 6, 2010 |
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Water Education Foundation Delta Tour:
July 14-18
Ecological Society of America:
Aug. 1-6
American Fisheries Society Meeting:
Sept. 12-16
Delta Science Conference: Sept. 27-29 |
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Photo by FISHBIO.
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Key Highlights
Calaveras
River Juvenile Migration Monitoring. A total of 73 O. mykiss were captured at Shelton Road (RM 28), increasing the
season total to 2,797.
Mokelumne
River Juvenile Migration Monitoring. A total of 11
Chinook salmon were captured at Vino Farms (RM 54), increasing the season total
to 8,397. Fifty-two Chinook salmon were captured at Golf (RM 38), increasing
the season total to 432, and 148 Chinook salmon were captured at Woodbridge (RM
38), increasing the season total to 375.
San
Joaquin River Juvenile Migration Monitoring. A
total of five juvenile Chinook salmon were captured at Mossdale during the
reporting period, increasing the season total to 302.
Stanislaus
River Juvenile Migration Monitoring. The 2010 Oakdale rotary
screw trap (RM 40) sampling season ended on June 25. A total of 11 Chinook
salmon were captured, increasing the season total to 36,823.
The 2010
Caswell State Park rotary screw trap (RM 8) sampling season ended on June 17.
No Chinook salmon were captured during the reporting period. The season total
remains at 1,104.
Tuolumne
River Juvenile Migration Monitoring. The Tuolumne
River rotary screw trap sampling at Waterford (RM 30) ended on June 11.A total of eighteen Chinook salmon were
captured, increasing the season total to 2,347. The Tuolumne River rotary screw trap sampling at Grayson (RM 5)
ended on June 17. Four Chinook salmon were captured, increasing the season
total to 52.
Weir
Monitoring. The Stanislaus River Weir sampling season ended on June 23.
One Chinook salmon was detected passing upstream of the weir.
San Joaquin River
Conditions. San Joaquin River flows at Vernalis
ranged from 2,563 cfs to 6,109 cfs. Water temperatures in the San Joaquin River
ranged between 62.5�F and
68.7�F and average daily
dissolved oxygen (DO) ranged between 8.8 mg/L and 10.7 mg/L.
Delta Exports. Combined total
exports (state and federal pumps) decreased during
the reporting period ranging from 7,531 cfs to 4,798 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) sampled twelve days between June 7 and June 27. A total of 73 O. mykiss were captured, increasing the
season total to 2,797. Daily catch ranged between 1 and 12 O. mykiss (Figure 1). Most of the O. mykiss captured, (n=69) were YOY (<100 mm) and were rated as fry
(n=1), parr (n=55), silvery parr (n=7), and smolt (n=1). Four Age 1+ (100-299
mm) fish were captured and rated as parr (n=1) and silvery parr (n=2). Average
forklengths and weights are provided in Table 1 for the 72 O. mykiss measured.
No Chinook salmon have been captured this
season.
Instantaneous
temperatures recorded at the trap ranged from 59�F to 64�F (Figure 2), and
turbidity ranged from 0.05 NTU to 1.77 NTU. Daily average flow fluctuated
between 121 cfs and 210 cfs at New Hogan Dam (NHG), between 28 cfs and 40 cfs
at Bellota (MRS), and no flow was recorded at Cosgrove Creek (COS).
Table 1.
Biosampling data for O. mykiss captured
and measured at Shelton Road between June 7 and June 27, 2010. Parentheses
indicate range.
Figure 1. 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 June
27, 2010.
Figure 2. Daily O. mykiss catch at Shelton Road and Calaveras River temperature
recorded instantaneously at trap location between November 1, 2009 and June 27,
2010.
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2009/10 Mokelumne River Juvenile Migration Monitoring
The Mokelumne River rotary screw trap at Vino Farms (RM 54) continued to sample
intermittently between June 7 and June 27, and a total of eleven Chinook salmon
were captured, increasing the season total to 8,397.
Average
daily flows from Camanche Reservoir (CMN) decreased from 1,332 cfs to 799 cfs
(Figure 3). Instantaneous temperature ranged between 56.1�F and 58.3�F and instantaneous turbidity ranged between
1.42 NTU and 2.68 NTU.
Two O. mykiss were captured at
Vino Farms during the report period increasing the season total to 52.
Figure 3. Daily Chinook catches at Vino
Farms and Mokelumne River flow recorded by Camanche Reservoir (CMN), between
December 1, 2009 and June 27, 2010. The Mokelumne River rotary
screw trap at Golf (RM 38) continued to sample intermittently between June 7 and
June 27. A total of 52 Chinook salmon were captured,
increasing the season total to 432 (Figure 4). Average daily flow
recorded at Woodbridge (WBR) decreased from 1,086 cfs to 530 cfs. Instantaneous temperature ranged between 59.4�F and 62.6�F and
instantaneous turbidity ranged between 1.67 NTU and 3.08 NTU. Seven O. mykiss were captured
at Golf during this reporting period, increasing the season total to 714 (Note:
One of the O. mykiss had clipped
adipose fin indicating hatchery origin).
Figure 4. Daily Chinook catches at Golf and Mokelumne
River flow recorded at Woodbridge (WBR), between December 1, 2009 and June 27,
2010. The Mokelumne River rotary
screw trap at Woodbridge (RM 38) continued
sampling during the reporting period. A total of 148 Chinook
salmon were captured during the
reporting period, increasing the season total to 375 (Figure 5). Average daily flows
recorded at Woodbridge (WBR) decreased from 1,086 cfs to 530 cfs. Instantaneous temperature ranged between 59.4�F and 63.1�F and
instantaneous turbidity ranged between 2.03 NTU and 3.39 NTU. Twenty-six O. mykiss were
captured at Woodbridge during this reporting period, increasing the season
total to 140.
Figure 5. Daily Chinook
catches at Woodbridge and Mokelumne River flow recorded at Woodbridge (WBR),
between April 14 and June 27, 2010.
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2010 San Joaquin River Juvenile Migration Monitoring
California Department of Fish and Game conducted nine days (ten tows per
day) of Kodiak trawling (Mossdale Trawl) on the San Joaquin River near Mossdale between June 7
and June 27. A total of five juvenile Chinook salmon were captured, and catch
ranged between zero and three Chinook per ten tows (Figure 6).
Figure 6. Chinook salmon catch (per ten
tows) at the Mossdale Trawl and San Joaquin River flow recorded by Vernalis
(VNS), 2010.
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2010 Stanislaus River Juvenile Migration Monitoring
Figure 7. Removing Stanislaus River rotary screw trap at Oakdale.  | The Stanislaus
River rotary screw trap at Oakdale (RM 40) discontinued sampling on June 25 (Figure 7). Twelve days were
sampled during the reporting period between June 7 and June 25. A total of
eleven juvenile Chinook salmon were captured, increasing the season total to
36,823. Daily catch ranged between zero and three Chinook salmon. Average forklengths
and weights of Chinook salmon are provided in Table 2 for all eleven fish that
were measured. Most of the measured Chinook were smolts (n=10), but a single
parr was caught and measured.
No O. mykisswere captured at Oakdale during the reporting period. The season total remains
at 14 O. mykiss.
Table
2. Biosampling data for Chinook salmon captured and measured at Oakdale between
June 7 and June 25, 2010.
Instantaneous temperature recorded
at the trap ranged from 60.9�F to 64.9�F, and turbidity ranged from 0.07 NTU to
1.52 NTU. Daily average flow during the reporting period ranged from 253 cfs to
439 cfs at Goodwin Dam (GDW) and 291 cfs to 345 cfs at Ripon (RIP) (Figure 8).
No trap efficiency
experiment were conducted during this reporting period.
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. No Chinook salmon were captured during the reporting period. The
season total remains at 1,104.
No O. mykiss were captured during the sampling period and the season total remains at one.
No trap efficiency
experiments were conducted due to insufficient daily catch.
Instantaneous temperature
recorded at the trap ranged from 67.1�F and 73.8�F, and turbidity ranged from 0.42
NTU to 4.57 NTU. Daily average flow at Ripon (RIP) ranged from 291 cfs to 345
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. A total of eighteen juvenile Chinook salmon were captured during
the reporting period, increasing the season total to 2,347. Daily catch ranged
between zero and seven Chinook salmon. Average forklengths and weights of the
salmon are provided in Table 3 for all eighteen fish that were measured, all of
which were rated as smolt.
No O. mykiss were captured this season.
Table 3. Biosampling data for Chinook salmon captured and measured at Waterford
between June 7 and June 11, 2010. Parentheses indicate range.
Instantaneous temperature
taken at the trap ranged from 52.7�F to 56.3�F, and turbidity ranged from 0.22
NTU to 1.38 NTU. Daily average flow records from La Grange (LGN) ranged from
1,350 cfs to 5,520 cfs (Figure 9).
Due to insufficient daily
catch, no trap efficiency experiments were conducted during the reporting
period.
Figure 9. Daily Chinook salmon catch at Waterford and
Tuolumne River flow recorded by La Grange (LGN) and Modesto (MOD), 2010.
Figure 10. Removing Tuolumne River rotary screw trap at Grayson.  | The 2010 Tuolumne
River rotary screw trap sampling at Grayson (RM 5) ended June 17 (Figure 10). Four Chinook salmon were captured during the reporting period, increasing
the season total to 52 (Table 4).
No O. mykiss were captured this season.
Trap efficiency releases were not conducted this season due to
insufficient daily catch.
Instantaneous temperature taken at the trap ranged
from 54.6�F to 62.4�F, and turbidity ranged from 0.92 NTU to 5.56 NTU. Daily
average flow at Modesto (MOD) ranged from 1,380 cfs to 5,620 cfs (Figure 11).
Table 4. Biosampling data for Chinook salmon captured and measured at Grayson June 7 and
June 11, 2010. Parentheses indicate range.
Figure
11. Daily Chinook salmon catch at Grayson and Tuolumne River flow at La Grange
(LGN) and Modesto (MOD), 2010.
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2009/10 Stanislaus River Weir Monitoring
Figure 12. Stanislaus River Weir removal.  | The Stanislaus River Weir sampling season ended on June 23. One Chinook
salmon was detected passing upstream, increasing the season total to 1,289
(Table 5; Figure 12).
No
O. mykiss were detected passing
upstream during this reporting period. The season total remains at ten O. mykiss.
Table 5. Net passage counts
for all species between June 7 and June 23, 2010 at the Stanislaus River Weir.
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Between June 7 and June 27 flows in the San
Joaquin River at Vernalis ranged from 2,563 cfs to 6,109 cfs (Figure 13). Water
temperatures in the San Joaquin River fluctuated between 62.5�F and 68.7�F at Vernalis; between 64.3�F and 73.0�F at Mossdale; and between 68.3�F and 74.6�F at Rough 'n Ready Island (Figure 14).
Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated between
6.5 mg/L and 8.0 mg/L in the deep water ship channel (measured at Rough 'n
Ready Island) and fluctuated between 8.8 mg/L and 10.7 mg/L at Mossdale (Figure
15).
Figure
13. San Joaquin River flow at Vernalis, June 1, 2009 through June 27, 2010.
Figure
14. San Joaquin River daily average water temperature at Vernalis, Mossdale,
and Rough 'n Ready, June 1, 2009 through June 27, 2010.
Figure
15. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n
Ready, June 1, 2009 through June 27, 2010.
Water temperature in the San Joaquin River generally
increases between January and June. Comparatively, 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 June, (2007-2010).
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Delta Exports
Combined total exports (state and federal
pumps) decreased during the
reporting period ranging from 7,531 cfs to 4,798 cfs. Mean daily pumping at the Harvey O. Banks
Pumping Plant (state pumps) ranged from 2,610 cfs to 3,530 cfs. Mean daily
pumping at the C.W. Jones Pumping Plant (federal pumps previously known as
Tracy Pumping Plant) decreased from 4,006 cfs to 2,136 cfs during the reporting
period (Figure 17).
Figure
17. Daily exports at the Federal and State pumping stations, June 1, 2009
through June 27, 2010.
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