header
Volume 2009/10, Issue 7
January 28, 2010
In This Issue
Calaveras River Juvenile Migration Monitoring
Mokelumne River Juvenile Migration Monitoring
Stanislaus River Juvenile Migration Monitoring
Tuolumne River Juvenile Migration Monitoring
Stanislaus River Weir Monitoring
Tuolumne River Weir Monitoring
San Joaquin Basin Escapement Surveys
San Joaquin Conditions
Delta Exports
events

March 18:
TRTAC Meeting

links

FISHBIO

 
 
The National Academies

signup
field notes
Fry
  Photo by FISHBIO.
 
Key Highlights
 
Calaveras River Migration Monitoring continued during the reporting period and a total of 42 O. mykiss were captured increasing the season total to 187.
 
Stanislaus River Juvenile Migration Monitoring was initiated at Oakdale (RM 40) on January 6. A total of 991 Chinook were captured in the rotary screw trap during the reporting period. Rotary screw trap monitoring at Caswell State Park (RM 8) began on January 11, and two Chinook were captured during the report period.

Tuolumne River Juvenile Migration Monitoring was initiated at Waterford (RM 30) on January 4 and at Grayson (RM 5) on January 5. A total of 85 Chinook salmon were captured at Waterford and zero were captured at Grayson during the reporting period.
 
Stanislaus River Weir Monitoringcontinued during the reporting period. A total of 4 Chinook salmon were detected as they passed upstream of the Stanislaus River Weir increasing the season total to 1,253.

Tuolumne River Weir Monitoring continued during the reporting period. A total of 11 Chinook salmon were detected as they passed upstream of the Tuolumne River Weir increasing the season total to 280.
 
San Joaquin Basin Escapement Surveys. Annual carcass survey results are being analyzed by CDFG and escapement estimates are expected to be released soon.

San Joaquin River Conditions. San Joaquin River flows at Vernalis increased slightly during the reporting period, ranging between 1,177 cfs and 1,466 cfs. Water temperatures in the San Joaquin River ranged between 49.7F and 53.3F and average daily dissolved oxygen (DO) ranged between 9.4 mg/L and 10.0 mg/L.
 
Delta Exports. Combined total exports (state and federal pumps) fluctuated during the reporting period ranging between 4,329 cfs and 6,431 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.
 


2009/10 Calaveras River Juvenile Migration Monitoring

The Calaveras River rotary screw trap at Shelton Road (RM 28) sampled eight days between January 4 and January 17. A total of 42 O. mykiss were captured during the reporting period increasing the season total to 187. Daily catch ranged between zero and nine O. mykiss (Figure 1). Of the O. mykiss captured, 2 were YOY (<100 mm) and 40 were Age 1+ (100-299 mm) and were rated as parr (n=18), silvery parr (n=22), and smolt (n=2). Average forklengths and weights of O. mykiss are provided in Table 1.

No Chinook salmon were captured during this reporting period.
 
Daily average flow fluctuated between 28 cfs and 41 cfs at New Hogan Dam (NHG), between 0 cfs and 6 cfs at Cosgrove Creek (COS) and no flow was recorded at Bellota (MRS). Instantaneous temperatures recorded at the trap ranged from 45F to 48F (Figure 2), and turbidity ranged from 0.17 NTU to 1.5 NTU. 

Table 1. Biosampling data for O. mykiss captured at Shelton Road between January 4 and January 17, 2010. Parentheses indicate range.
 
biosample table
 

 
Flow and 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, between November 1, 2009 and January 17, 2010.
 

 
 Temp and Catch

Figure 2. Daily O. mykiss catch at Shelton Road and Calaveras River temperature recorded instantaneously at trap location between November 1, 2009 and January 17, 2010.

 
2009/10 Mokelumne River Juvenile Migration Monitoring
 
The Mokelumne River rotary screw traps at Vino Farms (RM 54) and at Golf (RM 38) were sampled intermittently during the reporting period. A total of 1,711 Chinook salmon were captured at Vino Farms during the reporting period increasing the season total to 1,780. Daily catch ranged from 109 to 333 salmon ranging in length from 30 mm to 39 mm.

Average daily flows from Camanche Reservoir (CMN) ranged between 330 cfs and 336 cfs (Figure 3). Instantaneous temperature ranged between 49.8F and 51.6F and instantaneous turbidity ranged between 1.69 NTU and 2.57 NTU.
 
One O. mykiss has been captured at Vino Farms so far this season.
 
The Rotary Screw Trap at Golf has captured a total of 10 Chinook salmon fry this season. Average daily flows recorded at Woodbridge (WBR) ranged between 247 cfs and 264 cfs (Figure 4). Instantaneous temperature ranged between 49.8F and 52.0F and instantaneous turbidity ranged between 2.31 NTU and 8.83 NTU.
 
No O. mykiss have been captured at Golf this season.


Flow and Catch

Figure 3. Daily Chinook catches at Vino Farms and Mokelumne River flow recorded by Camanche Reservior (CMN), between December 1, 2009 and January 17, 2010.
 


Flow and Catch


Figure 4. Daily Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge (WBR), between December 1, 2009 and January 17, 2010.


2010 Stanislaus River Juvenile Migration Monitoring

RSTThe Stanislaus River rotary screw trap at Oakdale (RM 40) was installed on January 6, 2010 (Figure 5) and sampling was immediately initiated. The trap sampled continuously between January 6 and January 17.

A total of 991 juvenile Chinook salmon were captured during the reporting period. Daily catch ranged between 0 and 618 Chinook. Average forklengths and weights of Chinook salmon are provided in Table 2. Most of the measured Chinook salmon were fry (n=182) but smolts were also observed (n=9) including one large fish measuring 128 mm.
 

 
Table 2. Biosampling data for Chinook salmon captured and measured at Oakdale between January 6 and January 17, 2010.

 
biosample table
 
Instantaneous temperature taken at the trap ranged from 48.0F to 51.8F, and turbidity ranged from 0.20 NTU to 1.97 NTU. Daily average flow at Goodwin Dam (GDW) ranged between 200 cfs and 408 cfs, and flows at Ripon (RIP) ranged between 215 cfs and 342 cfs (Figure 6).

No trap efficiency experiments were conducted during this reporting period.

Flow and Catch

Figure 6. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded by Goodwin Dam (GDW) and Ripon (RIP), 2010.

The Stanislaus River rotary screw trap at Caswell Park (RM 8) started sampling immediately after installation on January 11, 2010.  A total of two Chinook salmon have been captured so far this season.



2010 Tuolumne River Juvenile Migration Monitoring

RSTThe Tuolumne River rotary screw trap at Waterford (RM 30) was installed on January 4, 2010 (Figure 7) and sampling was initiated immediately. The trap sampled continuously between January 4 and January 17.

A total of 85 juvenile Chinook salmon were captured during the reporting period. Daily catch ranged between zero and 25 Chinook (Figure 8). Average forklengths and weights of Chinook salmon are provided in Table 3.

No O. mykiss were captured during this reporting period.

Instantaneous temperature taken at the trap ranged from 48.5F to 54.5F, and turbidity ranged from 0.32 NTU to 17.3 NTU. Daily average flow at La Grange (LGN) was relatively stable ranging between 224 cfs and 256 cfs.

No trap efficiency experiments were conducted during this reporting period.

Table 3. Biosampling data for Chinook salmon captured and measured at Waterford between January 4 and January 17, 2010. Parentheses indicate range.
 
biosample table

Flow and Catch

Figure 8. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded by La Grange (LGN) and Modesto (MOD), 2009. Flows were not available from the MOD gauge during January 8-17, but were estimated to be about 300 cfs.

The Tuolumne River rotary screw trap at Grayson (RM 5) was installed on January 5, 2010 (Figure 9) and sampling was initiated immediately. The trap sampled continuously between January 5 and January 17.

No salmonids were captured and no trap efficiency experiments conducted during this reporting period.

Instantaneous temperature taken at the trap ranged from 48.3F to 54.8F, and turbidity ranged from 0.53 NTU to 5.82 NTU. Daily average flow at Modesto (MOD) was relatively stable at approximately 300 cfs.


 
2009/10 Stanislaus River Weir Monitoring 
 
Between January 4 and January 17, 2010 a total of 4 Chinook salmon were detected as they passed upstream of the Stanislaus River Weir increasing the season total to 1,253 (Figure 10). Daily passage ranged between zero and 3 Chinook salmon.
 
Zero O. mykiss were detected passing the weir during the reporting period.  Net upstream count remains at five O. mykiss this season.

Table 4. Annual Fall-run Chinook passage prior to January 3, 2003-2009. Asterisk designates sampling ended in January but resumed in late March until the end of May.
 
 Passage


 
Stan Cumm

Figure 10. 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 201 cfs and 408 cfs. Flows at Ripon (RIP; RM 15) ranged between 215 cfs and 342 cfs (Figure 11). 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 48.5˚F and 53.2˚F and daily average water temperatures at Ripon (RPN; RM 15) ranged between 49.5˚F and 54.2˚F (Figure 12). Instantaneous turbidity ranged between 0.26 NTU and 1.42 NTU (Figure 13). Instantaneous dissolved oxygen ranged between 10.32 mg/L and 12.29 mg/L and daily average dissolved oxygen at Ripon (RPN; RM 15) ranged between 10.5 mg/L and 11.1 mg/L (Figure 14).


Flow and Catch

Figure 11. 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.

Temp and Catch 

Figure 12. 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.

 

 Turb and Catch

Figure 13. Daily upstream Chinook passage recorded at the Stanislaus River Weir in relation to instantaneous turbidity recorded at the weir, 2009.
 D.O. and Catch

 
Figure 14. Daily upstream Chinook passage recorded 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), 2009.

 
2009/10 Tuolumne River Weir Monitoring
 
Between January 4 and January 17, 2010 a total of 12 Chinook salmon were detected as they passed upstream of the Tuolumne River Weir increasing the season total to 281. Daily passage ranged between zero and four Chinook. 
 
Daily average flow in the Tuolumne River at La Grange (LGN; RM 51.8) was stable between 224 cfs and 255 cfs. Flow at Modesto (MOD; RM 17) was relatively stable at about 300 cfs (Figure 15). 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 50.3˚F and 52.5˚F and daily average water temperatures at Modesto (MOD; RM 17) ranged between 50.3˚F and 52.1˚F (Figure 16). Instantaneous turbidity ranged between 0.76 NTU and 5.41 NTU (Figure 17), and instantaneous dissolved oxygen ranged between 9.69 mg/L and 10.96 mg/L (Figure 18).


Flow and Catch
 
Figure 15. Daily upstream Chinook passage recorded 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 Vernalis (VNS), 2009.

Temp and Catch

Figure 16. Daily upstream Chinook passage recorded 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 Vernalis (VER), Mossdale (MSD) and Rough & Ready (RRI), 2009.

Turb and Catch 

 
Figure 17. Daily upstream Chinook passage recorded at the Tuolumne River Weir in relation to instantaneous turbidity recorded at the weir, 2009.

D.O. and Catch

Figure 18. Daily upstream Chinook passage recorded 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), 2009.



 
2009 San Joaquin Basin Escapement Surveys 
 
Annual carcass survey results are being analyzed by CDFG and escapement estimates are expected to be released soon.

 
San Joaquin Conditions
 
Between January 4 and January 17, 2010, flows in the San Joaquin River at Vernalis remained relatively stable ranging between 1,177 cfs and 1,466 cfs (Figure 19). Water temperatures in the San Joaquin River ranged between 49.7F and 53.3F at Vernalis; between 49.7F and 53.6F at Mossdale; and between 49.4F and 50.4F at Rough 'n Ready Island (Figure 20). Average daily dissolved oxygen (DO) in the San Joaquin River ranged between 8.9 mg/L and 9.2 mg/L in the deep water ship channel (measured at Rough 'n Ready Island) and fluctuated between 9.4 mg/L and 10.0 mg/L at Mossdale (Figure 21).
 


Flow 

Figure 19. San Joaquin River flow at Vernalis, January 1, 2009 through January 17, 2010.


Temp 

 

Figure 20. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready, January 1, 2009 through January 17, 2010.
 

D.O.
 
 
Figure 21. San Joaquin daily average dissolved oxygen at Mossdale and Rough 'n Ready, January 1, 2009 through January 17, 2010.

 
Delta Exports 
 
Combined total exports (state and federal pumps) fluctuated during the reporting period ranging between 4,329 cfs and 6,431 cfs. Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) fluctuated between 3,327 cfs and 5,424 cfs. Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) remained stable between 999 cfs and 1,009 cfs during the reporting period (Figure 22).


 Exports


Figure 22. Daily exports at the C.W. Jones Pumping Plant (federal) and Harvey O. Banks Pumping Plant (state), January 1, 2009 through January 17, 2010.


footer