Volume 2009/10, Issue 8
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February 12, 2010 | |
March 18: TRTAC Meeting
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Photo by FISHBIO.
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Key Highlights
Calaveras River Migration Monitoring
continued
during the reporting period and a total of 181 O. mykiss were captured at Shelton Road (RM 28) increasing the
season total to 368.
Mokelumne River Juvenile Migration Monitoring
continued during the reporting period. A total of
2,683 Chinook were captured at Vino Farms (RM 54) increasing the season total
to 4,669 and 6 Chinook were captured at Golf (RM 38) increasing the season
total to 16.
Stanislaus
River Juvenile Migration Monitoring
continued during the reporting period. A total of 15,633 Chinook salmon
were captured at Oakdale (RM 40) increasing the season total to 16,624. Data
are not yet available from the rotary srew trap at Caswell State Park (RM 8)
for this report period.
Tuolumne
River Juvenile Migration Monitoring
continued during the reporting period. A total of 418 Chinook salmon were captured at
Waterford (RM 30) increasing the season total to 503. A total of 12 Chinook
salmon have been captured at Grayson (RM 5) this season, all during the
reporting period.
Stanislaus River Weir Monitoring
continued
during the reporting period. A total of 9 Chinook salmon were detected as they
passed upstream of the Stanislaus River Weir increasing the season total to 1,262.
Tuolumne River Weir Monitoring
continued during the reporting period. A total of 3 Chinook salmon were detected
as they passed upstream of the Tuolumne River Weir increasing the season total
to 283.
San Joaquin River Conditions.
San Joaquin River flows at Vernalis increased
ranging between 1,465 cfs and 4,494 cfs. Water temperatures in the San Joaquin
River ranged between 47.7�F and 52.6�F and average daily dissolved oxygen (DO)
ranged between 8.7 mg/L and 9.7 mg/L. Delta Exports.
Combined total exports (state and federal pumps) fluctuated during the reporting period ranging between 2,413 cfs and
8,680 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 eight days between January 18 and January 31. A total of 181 O. mykiss were captured during the reporting period increasing the season total to 368. Daily catch ranged between zero and 89 O. mykiss (Figure 1). Most of the O. mykiss captured, (n=153) were Age 1+ (100-299 mm) and were rated as parr (n=19), silvery parr (n=120), and smolt (n=16). Two YOY were also captured. Average forklengths and weights of O. mykiss are provided in Table 1.
Catches were highest immediately following a run-off event that resulted in flows of 1,239 cfs at Bellota, and catches may have been higher during the freshet when high flows precluded sampling.
No Chinook salmon have been captured this season.
Instantaneous temperatures recorded at the trap ranged from 48.0�F to 49.5�F (Figure 2), and turbidity ranged from 0.66 NTU to 13.80 NTU. Daily average flow fluctuated between 29 cfs and 54 cfs at New Hogan Dam (NHG), between 14 cfs and 542 cfs at Cosgrove Creek (COS) and between 0 and 1,239 cfs at Bellota (MRS).
Table 1. Biosampling data for O. mykiss captured at Shelton Road between January 18 and January 31, 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 January 31, 2010.
Figure 2. Daily O. mykiss catch at Shelton Road and Calaveras River temperature recorded instantaneously at trap location between November 1, 2009 and January 31, 2010. |
2009/10 Mokelumne River Juvenile Migration Monitoring
The Mokelumne River rotary screw traps at Vino Farms (RM 54) continued to sample
intermittently between January 18 and January 31 and a total of 2,683 Chinook
salmon were captured increasing the season total to 4,669.
Average
daily flows from Camanche Reservoir (CMN) were stable between 330 cfs and 332
cfs (Figure 3). Instantaneous temperature ranged between 48.6�F and 50.5�F and instantaneous turbidity ranged between
1.73 NTU and 5.65 NTU.
No O. mykiss were captured at Vino Farms during the report period. One
O. mykiss has been captured so far
this season.
Figure 3. Daily Chinook catches at Vino Farms and Mokelumne River flow recorded by Camanche Reservior (CMN), between December 1, 2009 and January 31, 2010.
The Mokelumne River rotary screw trap at Golf (RM 38) continued to sample intermittently
between January 18 and January 31 and a total of 6 Chinook salmon were captured increasing the season total to 16.
Average daily flows
recorded at Woodbridge (WBR) ranged between 251 cfs and 292 cfs (Figure 4). Instantaneous temperature ranged between 48.7�F and 50.5�F and
instantaneous turbidity ranged between 2.70 NTU and 4.84 NTU.
One O. mykiss (forklength 380
mm) was captured at Golf during this reporting period.
Figure 4. Daily Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge (WBR), between December 1, 2009 and January 31, 2010. |
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2010 Stanislaus River Juvenile Migration Monitoring
The Stanislaus River rotary screw trap at Oakdale (RM 40) sampled continuously between January 18 and January 31. A total of 15,633 juvenile Chinook salmon were captured during the reporting period increasing the season total to 16,624. Daily catch ranged between 9 and 7,122 Chinook salmon. Average forklengths and weights of Chinook salmon are provided in Table 2 for 811 fish that were measured. Most of the measured Chinook were fry (n=744) but there were also some parr (n=12) and smolts (n=55), including 50 larger fish (i.e., > 100 mm).
Table 2. Biosampling data for Chinook salmon and O. mykiss captured and measured at Oakdale between January 18 and January 31, 2010.
Instantaneous temperature recorded at the trap ranged from 46.9�F to 50.3�F, and turbidity ranged from 0.67 NTU to 38.60 NTU. Daily average flow at Goodwin Dam (GDW) ranged between 202 cfs and 220 cfs, and flows at Ripon (RIP) ranged between 235 cfs and 537 cfs (Figure 5).
Two trap efficiency experiments were conducted with naturally spawned juvenile Chinook salmon marked caudal fin green (CFG). Preliminary capture efficiency estimates from these releases were 22.3% and 32.2% at flows of 215 cfs and 204 cfs, respectively (Table 3).
Table 3. Trap efficiency tests conducted at Oakdale between January 18 and January 31, 2010.
Figure 5. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded by Goodwin Dam (GDW) and Ripon (RIP), 2010.
Data are not yet available from operation of the Stanislaus River rotary screw trap at Caswell State Park (RM 8) during January 18 through January 31.
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2010 Tuolumne River Juvenile Migration Monitoring
The Tuolumne River rotary screw trap at Waterford (RM 30) operated continuously between January 18 through January 31. A total of 418 juvenile Chinook salmon were captured during the reporting period increasing the season total to 503. Daily catch ranged between zero and 128 Chinook salmon (Figure 6). Average forklengths and weights of Chinook salmon are provided in Table 4 for 326 fish that were measured. Most of the measured fish were fry (n=360) but there were also parr (n=1) and smolt (n=5).
No O. mykiss were captured during this reporting period.
Table 4. Biosampling data for Chinook salmon captured and measured at Waterford between January 18 and January 31, 2010. Parentheses indicate range.
Instantaneous temperature taken at the trap ranged from 46.0�F to 53.0�F, and turbidity ranged from 0.19 NTU to 33.30 NTU. Daily average flow records from La Grange (LGN) are not complete for the reporting period but flows were estimated to be stable around 225 cfs.
Two trap efficiency experiments were conducted using naturally spawned juvenile Chinook salmon marked caudal fin orange (CFO). Preliminary capture efficiency estimates from these releases were 20.0% and 11.0% at estimated flows of 225 cfs (Table 5).
Table 5. Trap efficiency tests conducted at Waterford between January 18 and January 31, 2010. Asterisk denotes estimated flow.
Figure 6. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded by La Grange (LGN) and Modesto (MOD), 2010.
 The Tuolumne River rotary screw trap at Grayson (RM 5) continued sampling during the reporting period (Figure 7). A total of 12 Chinook salmon were captured and daily catch ranged between zero and four Chinook salmon (Figure 8). Average forklengths and weights of Chinook salmon are provided in Table 6 for all 12 fish that were measured. Most of the measured fish were fry (n=10) but there were some smolt (n=2).
No O. mykiss captured yet this season.
Trap efficiency releases have not yet been conducted this season.
Instantaneous temperature taken at the trap ranged from 48.3�F to 54.8�F, and turbidity ranged from 0.53 NTU to 5.82 NTU. Daily average flow at Modesto (MOD) increased during the reporting period ranging between 223 cfs and 1,023 cfs due to high runoff events.
Table 6. Biosampling data for Chinook salmon captured and measured at Grayson between January 18 and January 31, 2010. Parentheses indicate range.
Figure 8. 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
  Between January 18 and January 31 a total of nine Chinook salmon were detected as they passed upstream of the Stanislaus River Weir increasing the season total to 1,262 (Figure 12). Daily passage ranged between zero and three Chinook salmon. On January 19, turbidity exceeded 3.0 NTU thus hindering the ability to properly identify species with the vaki system. Trapping was conducted January 19 through January 27 due to high turbidity (eg. >3 NTU) which precluded identification to species using the vaki system (Figure 9).
One male O. mykiss (forklength 390 mm) was captured during trapping on January 22 and was passed upstream (Figure 10). Net upstream count is now at six O. mykiss this season.
During the reporting period, nine striped bass were passed downstream on January 19 and 23. Turbidity spiked to 74.9 NTU and 42.8 NTU on these dates as a result of storm runoff (Figure 11).
Table 7. Annual Chinook passage at the Stanislaus River Weir 2003-2009. Asterisk denotes extended no sample period. The weir was not sampled from January 10 to March 23, 2009.
Figure 12. Cumulative Chinook salmon upstream passage recorded at the Stanislaus River Weir, 2003 to 2009.
Daily average flow in the Stanislaus River at Goodwin Dam (GDW; RM 58) fluctuated between 202 cfs and 220 cfs. Flows at Ripon (RIP; RM 15) ranged between 235 cfs and 537 cfs (Figure 13). Note: flows downstream of Goodwin Dam may be higher than dam releases due to irrigation returns and other factors. Instantaneous water temperatures measured at the weir fluctuated during the reporting period ranging between 46.5˚F and 52.7˚F and daily average water temperatures at Ripon (RPN; RM 15) ranged between 49.0˚F and 53.9˚F (Figure 14). Instantaneous turbidity ranged between 2.00 NTU and 42.80 NTU (Figure 15). Instantaneous dissolved oxygen ranged between 10.20 mg/L and 11.35 mg/L and daily average dissolved oxygen at Ripon (RPN; RM 15) ranged between 9.1 mg/L and 10.1 mg/L (Figure 16).
Figure 13. Daily upstream Chinook passage recorded at the Stanislaus River Weir in relation to daily average flows (cfs) recorded in the Stanislaus River at Goodwin (GDW) and Ripon (RIP) and in the San Joaquin River at Vernalis (VNS), 2009/10.
Figure 14. Daily upstream Chinook passage recorded at the Stanislaus River Weir in relation to instantaneous water temperature recorded at the weir and daily average water temperature recorded in the Stanislaus River at Ripon (RPN) and in the San Joaquin River at Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI), 2009/10.
Figure 15. Daily upstream Chinook passage recorded at the Stanislaus River Weir and instantaneous turbidity recorded at the weir, 2009/10.
Figure 16. Daily upstream Chinook passage recorded at the Stanislaus River Weir and instantaneous dissolved oxygen recorded at the weir and daily average dissolved oxygen recorded in the Stanislaus River at Ripon (RPN) and in the San Joaquin River at Mossdale (MSD) and Rough & Ready (RRI), 2009/10.
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2009/10 Tuolumne River Weir Monitoring
Between January 18 and January 31 a
total of 3 Chinook salmon were detected as they passed upstream of the Tuolumne
River Weir increasing the season total to 283. Daily passage ranged between
zero and two Chinook.
Daily average flow records from the Tuolumne
River at La Grange (LGN; RM 51.8) are incomplete for the reporting period but
it is estimated that flows were stable around 225 cfs. Flow at Modesto (MOD; RM
17) fluctuated during the reporting period between 223 cfs and 1,023 cfs
(Figure 17). Note: flows at Modesto may be higher than La Grange due to
accretion and Dry Creek inflow. Instantaneous water temperatures measured at
the weir ranged between 48.3˚F and 55.2˚F and daily average water temperatures
at Modesto (MOD; RM 17) are complete for only three of the 14 days during the
reporting period and ranged between 50.3˚F and 52.0˚F (Figure 18).
Instantaneous turbidity ranged between 0.23 NTU and 25.20 NTU (Figure 19), and
instantaneous dissolved oxygen ranged between 9.06 mg/L and 10.42 mg/L (Figure
20).
Figure
17. Daily upstream Chinook passage at the Tuolumne River Weir and daily average
flows (cfs) recorded in the Tuolumne River at La Grange (LGN) and Modesto (MOD)
and in the San Joaquin River at Maze Rd. Bridge (MRB) and Vernalis (VNS), 2009/10.
Figure
18. Daily upstream Chinook passage at the Tuolumne River Weir and instantaneous
water temperature recorded at the weir and daily average water temperature
recorded in the Tuolumne River at Modesto (MOD) and in the San Joaquin River at
Maze Rd. Bridge (MRB), Vernalis (VER), Mossdale (MSD) and Rough & Ready
(RRI), 2009/10.
Figure
19. Daily upstream Chinook passage at the Tuolumne River Weir and instantaneous
turbidity recorded at the weir, 2009/10.
Figure
20. Daily upstream Chinook passage at the Tuolumne River Weir and instantaneous
dissolved oxygen recorded at the weir and daily average dissolved oxygen
recorded in the San Joaquin River at Mossdale (MSD) and Rough & Ready
(RRI), 2009/10.
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Between January 18 and January 31, flows in
the San Joaquin River at Vernalis sharply increased from 1,465 cfs to 4,494 cfs
starting on January 19 due to storm runoff and fell to 2,061 cfs by January 31
(Figure 21). Water temperatures in the San Joaquin River fluctuated between 47.7�F and 52.6�F at Vernalis; between 48.2�F and 52.7�F at Mossdale; and between 48.8�F and 50.5�F at Rough 'n Ready Island (Figure 22).
Average daily dissolved oxygen (DO) in the San Joaquin River exhibited an
overall decrease ranging between 8.0 mg/L and 9.8 mg/L in the deep water ship
channel (measured at Rough 'n Ready Island) and fluctuated between 8.7 mg/L and
9.7 mg/L at Mossdale (Figure 23).
Figure
21. San Joaquin River flow at Vernalis, January 1, 2009 through January 31,
2010.
Figure
22. San Joaquin River daily average water temperature at Vernalis, Mossdale,
and Rough 'n Ready, January 1, 2009 through January 31, 2010.
Figure
23. San Joaquin daily average dissolved oxygen at Mossdale and Rough 'n Ready, January
1, 2009 through January 31, 2010.
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Delta Exports
Combined total exports (state and federal
pumps) generally increased from
5,947 cfs on January 19 to 8,680 cfs on January 30, then dropped to
approximately 7,000 cfs on January 31. Mean daily pumping at the Harvey O. Banks Pumping
Plant (state pumps) ranged from 582 cfs and 5,353 cfs. Mean daily pumping at
the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping
Plant) ranged from 1,007 cfs to 3,329 cfs during the reporting period (Figure
24).
Figure
24. Daily exports at the Federal and State pumping stations, January 1, 2009
through January 31, 2010.
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