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Volume 2011/12, Issue 8  January 18, 2012
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In This Issue
Calaveras River Juvenile Migration Monitoring
Stanislaus River Juvenile Migration Monitoring
Tuolumne River Juvenile Migration Monitoring
Mokelumne River Juvenile Migration Monitoring
Stanislaus River Weir Adult Migration Monitoring
Tuolumne River Weir Adult Migration Monitoring
Mokelumne River Woodbridge Dam Fish Ladder Monitoring
San Joaquin Basin Escapement Surveys
San Joaquin River Conditions
Delta Exports
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 March 28-31

Salmonid Restoration Federation Conference:
April 4-7

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Chinook fry
  Photo by FISHBIO
Key Highlights
December 26, 2011 - January 8, 2012

Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) during the reporting period.A total of 8 O. mykiss were captured, increasing the season total to 34.

 

Stanislaus River Juvenile Migration Monitoring continued at Oakdale (RM 40) during the reporting period. A total of 64 Chinook salmon were captured, increasing the season total to 85.

Tuolumne River Juvenile Migration Monitoring at Waterford (RM 30) began on January 2, and a total of 173 Chinook salmon fry were captured during the reporting period. Monitoring at Grayson (RM 5) began on January 2. No Chinook salmon were captured during the reporting period.

Mokelumne River Juvenile Migration Monitoring continued at Vino Farms (RM 54) during the reporting period. A total of 158 Chinook salmon were captured, increasing the season total to 177. Monitoring at Golf (RM 38) began on December 27 and a total of 6 Chinook salmon were captured during the reporting period.

Stanislaus River Weir Monitoring continued during the reporting period. A total of 11 Chinook salmon passed upstream through the weir between December 26 and January 8, increasing the total count since November 8th to 804.

Tuolumne River Weir Monitoring continued during the reporting period. A total of 22 Chinook salmon passed upstream through the weir between December 26 and January 8, increasing the season total to 2,823.

Mokelumne River Woodbridge Dam Fish Ladder Monitoring continued during the reporting period and a total of 30 Chinook passed upstream of the dam between December 26 and January 8, increasing the season total to 18,585.

 

San Joaquin Basin Escapement Surveys. Annual carcass surveys conducted by CDFG continued through the week of December 26.

 

San Joaquin River Conditions. San Joaquin River flow at Vernalis ranged from 1,611 cfs to 1,820 cfs. Water temperature in the San Joaquin River increased from 44.8F to 49.7F at Vernalis, and from 45.3F to 50.5F at Mossdale. Average daily dissolved oxygen (DO) in the San Joaquin River ranged from 11.2 mg/L to 11.9 mg/L at Mossdale, and from 10.7 mg/L to 13.4 mg/L at Rough 'n Ready.

Delta Exports. Combined total exports (state and federal pumps) fluctuated during the reporting period, ranging from 5,281 cfs to 8,083 cfs.


2011/12 Calaveras River Juvenile Migration Monitoring


The Calaveras River rotary screw trap at Shelton Road (RM 28) sampled for sixteen days between December 26 and January 8. A total of 8 O. mykiss were captured O. mykiss during the reporting period, increasing the season total to 34. Daily catches ranged from zero to three individuals (Figure 1), and all of the O. mykiss captured were Age 1+ (100-299 mm) and were rated as parr (n=2), silvery parr (n=5), and smolt (n=1). Average forklengths and weights of O. mykiss are provided in Table 1.

No Chinook salmon were captured during this reporting period.

 

Instantaneous temperature recorded at the trap ranged from 43.3F to 48.2F, and turbidity ranged from 0.33 NTU to 2.26 NTU. During the reporting period, daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) decreased from 99 cfs to 46 cfs, and at Bellota (MRS) flow decreased from 104 cfs and 32 cfs.

Table 1. Biosampling data for O. mykiss captured at Shelton Road between December 26 and January 8, 2011. Parenthesis indicates range.
 
Calaveras Catch

 

O. mykiss catch 

Figure 1. Daily O. mykiss catch at Shelton Road, and Calaveras River flow recorded by New Hogan Dam (NHG) and Cosgrove Creek (COS) combined and flow recorded at Bellota (MRS), in 2011 and 2012.

2011/12 Stanislaus River Juvenile Migration Monitoring  

The Stanislaus River rotary screw trap at Oakdale (RM 40) operated continuously between December 26 and January 8. A total of 64 Chinook salmon were captured Chinook salmon during the reporting period, increasing the season total to 85. Average forklengths and weights of all Chinook salmon are provided in Table 2. Most of the fish measured were fry (n = 63), but one captured Chinook salmon was greater than 100 mm and rated a smolt.

 

No O. mykiss were captured during the reporting period. The season total remains at fourteen.

 

Instantaneous temperature taken at the trap ranged from 44.0F to 47.8F, and turbidity ranged from 0.19 NTU to 1.44 NTU. Daily average flow at Goodwin Dam (GDW) ranged from 505 cfs to 615 cfs, and flow ranged from 525 cfs to 601 cfs at Ripon (RIP) (Figure 2).

 

Table 2. Biosampling data for salmonids captured and measured at Oakdale between December 26 and January 8, 2011.


Oakdale Flow

Figure 2. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam (GDW) and Ripon (RIP) in 2011 and 2012.


2012 Tuolumne River Juvenile Migration Monitoring 

  

The Tuolumne River rotary screw trap at Waterford (RM 30) began operating on January 2. A total of 173 juvenile Chinook salmon fry were captured. Daily catch ranged between 13 and 60 Chinook (Figure 3). Average forklengths and weights of all Chinook salmon are provided in Table 3. Most of the Chinook salmon captured were fry (n = 166), although a smolt (n = 1) was also observed. 

 

 

 

 

Table 3. Biosampling data for Chinook salmon captured and measured at Waterford between January 2 and January 8, 2012. Parentheses indicate range.


No O. mykiss were captured during this reporting period.

 

Instantaneous temperature taken at the trap ranged from 48.3F to 49.2F, and turbidity ranged from 0.53 NTU to 1.16 NTU. Daily average flow at La Grange (LGN) was stable between 364 cfs and 368 cfs.


One trap efficiency experiment was conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin orange (CFO). The preliminary estimated capture efficiency was 21.1% at a flow of 365 cfs (Table 4).

Table 4. Trap efficiency tests conducted at Waterford between January 2 and January 8, 2012.

Grand Tab


Tuolumne Flow

Figure 3. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded at La Grange (LGN) and Modesto (MOD) between December 1, 2011, and January 8, 2012.

  

The Tuolumne River rotary screw traps at Grayson (RM 5) began operating on January 2. No Chinook salmon were captured during the reporting period. 

 

Instantaneous temperature taken at the trap ranged from 48.9F to 50.5F, and turbidity ranged from 0.30 NTU to 1.04 NTU. Daily average flow at Modesto (MOD) was stable during the reporting period, ranging between 456 cfs and 466 cfs.

2011/12 Mokelumne River Juvenile Migration Monitoring  

The Mokelumne River rotary screw trap at Vino Farms (RM 54) was sampled intermittently. A total of 158 juvenile Chinook salmon were captured during the reporting period, bringing the season total to 177.


Average daily flow from Camanche Reservoir (CMN) ranged from 331 cfs to 337 cfs (Figure 4). Instantaneous temperature ranged between 48.4
F and 50.9F, and instantaneous turbidity ranged between 1.53 NTU and 1.76 NTU.

Vino Catch

 

Figure 4. Daily juvenile Chinook catches at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir (CMN), between December 1, 2011, and December 25, 2011.

The Mokelumne River rotary screw trap at Golf (RM 38) was installed and intermittent monitoring began on December 27, 2011. A total of 6 juvenile Chinook salmon have been captured through the end of the reporting period.


Average daily flow recorded at Woodbridge (WBR) ranged from 241 cfs to 256 cfs (Figure 5). Instantaneous temperature ranged between 47.3
F and 49.6F, and instantaneous turbidity ranged between 1.71 NTU and 2.56 NTU.

 

Golf Catch  

Figure 5. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge (WBR), between December 15, 2011, and January 8, 2012.  


2011 Stanislaus River Weir Adult Migration Monitoring   

 

Between December 26 and January 8 the Vaki Riverwatcher detected a total of 11 Chinook salmon as they passed upstream of the Stanislaus River weir, increasing the cumulative passage since November 8th to 804 salmon (Figure 6; Table 5). Daily passage during the December 26 to January 8 sampling period ranged from 0 to 3 Chinook salmon (Figure 7).

 

Instantaneous water temperature measured at the weir ranged from 44.8˚F to 49.0˚F, and daily average water temperature at Ripon (RPN; RM 15) ranged from 45.5˚F to 49.2˚F (Figure 8). Instantaneous turbidity ranged between 0.40 NTU and 0.79 NTU (Figure 9). Instantaneous dissolved oxygen at the weir ranged between 11.38 mg/L and 12.87 mg/L, and daily average dissolved oxygen at Ripon ranged from 10.58 mg/L to 11.25 mg/L (Figure 10).

 

Daily average flow in the Stanislaus River at Goodwin Dam (GDW; RM 58) increased from 505 cfs to 615 cfs. Flows at Ripon increased, from 525 cfs to 601 cfs. Note: flows downstream of Goodwin Dam may differ from dam releases due to irrigation, precipitation and other factors.

 

Table 5. Annual fall-run Chinook passage at the Stanislaus River weir prior to December 25, 2003-2011. Due to high flows throughout September and October, the Stanislaus River weir began sampling later than usual in 2011. Thus, the second column of Table 1 limits the inter-annual comparison to passage between November 8 and January 8.  
Chinook Passage 
 

Cummulative Passage

Figure 6. Cumulative passage of fall-run Chinook salmon recorded at the Stanislaus River weir from 2003-2011. Note: Monitoring did not begin in 2011 until November 8.

Flow
Figure 7. Daily upstream Chinook passage at the Stanislaus River weir in relation to daily average flows (cfs) recorded in the Stanislaus River at Goodwin (GDW) and Ripon (RIP), 2011 and 2012.

Water Temperature

Figure 8. 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) in 2011 and 2012.

Turbidity
Figure 9. Daily upstream Chinook passage at the Stanislaus River weir in relation to instantaneous turbidity recorded at the weir in 2011 and 2012.


Dissolved Oxygen

Figure 10. Daily upstream Chinook passage at the Stanislaus River weir in relation to 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) in 2011 and 2012.

 

2011 Tuolumne River Weir Adult Migration Monitoring 

 

Between December 26 and January 8 a total of 22 Chinook salmon were detected by the Vaki Riverwatcher as they passed upstream of the Tuolumne River weir, increasing the season total to 2,823 (Figure 11; Table 6). Daily passage ranged between 0 and 5 Chinook salmon (Figure 12).

 

Daily average flow in the Tuolumne River ranged from 364 cfs to 368 cfs at La Grange (LGN; RM 50) and from 456 cfs to 466 cfs at Modesto (MOD; RM 17). Note: flows downstream of La Grange may be higher than dam releases due to accretion and Dry

Creek inflow.

 

Instantaneous water temperature measured at the weir ranged from 47.5˚F and 51.8˚F and daily average water temperature at Modesto ranged from 46.6˚F and 50.4˚F (Figure 13). Instantaneous turbidity ranged between 0.33 NTU and 1.64 NTU (Figure 14), and instantaneous dissolved oxygen ranged between 11.27 mg/L and 11.92 mg/L (Figure 15).

 

 

Table 6. Annual fall-run Chinook passage at the Tuolumne River weir prior to January 8, 2009 - 2011.
Tuolumne Cummulative YTD Table

 
Cummulative Chinook Passage

Figure 11. Fall-Run Chinook salmon cumulative passage recorded at the Tuolumne River weir in 2009 - 2011.
 

  

Passage and Flow

Figure 12. Daily upstream Chinook passage at the Tuolumne River Weir in relation to daily average flows (cfs) recorded in the Tuolumne River at La Grange (LGN) and Modesto (MOD), and in the San Joaquin River at Maze Road Bridge (MRB) and Vernalis (VNS) in 2011 and 2012.

 

Passage and Temperature

Figure 13. Daily upstream Chinook passage at the Tuolumne River Weir in relation to 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 Road Bridge (MRB), Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI) in 2011 and 2012.

 

Passage And Turbidity

Figure 14. Daily upstream Chinook passage at the Tuolumne River Weir in relation to instantaneous turbidity recorded at the weir in 2011 and 2012.

 

Passage and Dissolved Oxygen

Figure 15. Daily upstream Chinook passage at the Tuolumne River Weir in relation to 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) in 2011 and 2012.


Mokelumne River Woodbridge Dam Fish Ladder Monitoring

 

Fall-run Chinook salmon returning to the Mokelumne River are counted annually by East Bay Municipal Utility District (EBMUD) as they ascend the fish ladder at Woodbridge Dam. During the reporting period 30 Chinook salmon were observed passing upstream of the dam, increasing the season total to 18,585 (Figure 16). Daily passage ranged between zero and six Chinook salmon.

Daily average flow in the Mokelumne River ranged from 331 cfs to 337 cfs at Camanche Reservoir (CMN) during the reporting period.

Chinook passage and flow 

Figure 16. Daily upstream Chinook passage recorded at the Woodbridge Dam fish ladder in relation to daily average flows (cfs) recorded in the Mokelumne River at Camanche Reservoir (CMN), 2011 and 2012. 



San Joaquin Basin Escapement Surveys

 

Annual carcass surveys conducted by CDFG continued through the week of December 26. The largest number of live fish was observed on the Stanislaus River, with a live count of 5 Chinook during the reporting period. On both the Merced and Tuolumne rivers, peak live counts were at 3 and 2 Chinook salmon, respectively.


A total of 6 redds were observed on the Merced River and 42 were recorded on the Stanislaus River while no redds were recorded on the Tuolumne River. CDFG will continue surveys on each stream to recover tagged carcasses, but will not be tagging any new fish after January 1.

 

A total of 73 females were spawned at the Merced River Fish Facility (MRFF) during the 2011 fall-run Chinook salmon migration.


San Joaquin River Conditions 

During the reporting period, flow in the San Joaquin River at Vernalis ranged from 1,611 cfs to 1,820 cfs (Figure 17). Water temperature in the San Joaquin River increased from 44.8F to 49.7F at Vernalis, from 45.3F to 50.5F at Mossdale, and from 45.4F to 47.7F at Rough 'n Ready Island (Figure 18). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 11.2 mg/L to 11.9 mg/L at Mossdale, and from 10.7 mg/L to 13.4 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island; Figure 19).

 

Flow

 

Figure 17. San Joaquin River flow at Vernalis from January 1, 2011, through January 8, 2012.

 

Temperature  

Figure 18. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready from January 1, 2011, through January 8, 2012.

   

Dissolved Oxygen 

 Figure 19. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready, from January 1, 2011, through January 8, 2012.   


Delta Exports

Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) ranged from 1,950 cfs to 4,010 cfs (Figure 20). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 2,413 cfs to 4,082 cfs. Combined total exports (state and federal pumps) during this period ranged from 5,281 cfs to 8,083 cfs.Exports

Figure 20. Daily exports at the state and federal pumping stations from January 1, 2011, through January 8, 2012.


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Data Disclaimer:  The data displayed on the FISHBIO website are courtesy of California Department of Fish & Game (CDFG), U.S. Fish & Wildlife Service (USFWS), Tri-dam, Turlock Irrigation District (TID), Modesto Irrigation District (MID), East Bay Municipal Utility District (EBMUD) and FISHBIO.  Data are intended to be current, but are preliminary and are not guaranteed to be accurate.  Source data compiled and provided by FISHBIO, from whom further information can be obtained.  Use or reproduction of this data is prohibited without prior permission.