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Volume 2010, Issue 17
August 5, 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
San Joaquin Conditions
Delta Exports
events
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

links

FISHBIO

 
 
NOAA Southwest Region

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field notes
O. mykiss
  Photo by FISHBIO.
 
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 72.9F and 78.0F 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.
 


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.

O. mykiss data

Season Catch Pie Graph

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 40F to 64F (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).

Flow and Catch

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.

 
 Temp and Catch

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.


 
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 48.6F and 58.3F and instantaneous turbidity ranged between 1.38 NTU and 10.10 NTU.

Flow and Catch

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 48.2F and 63.5F and instantaneous turbidity ranged between 1.63 NTU and 13.00 NTU.

 
 Flow and Catch
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 54.7F and 64.2F and instantaneous turbidity ranged between 1.84 NTU and 4.21 NTU.
 

Flow and Catch 

Figure 6. Daily Chinook catches at Woodbridge and Mokelumne River flow recorded at Woodbridge (WBR), between April 14 and July 14, 2010.


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).

Season Catch Pie Graph

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 46.9F to 64.9F, 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.
Efficiency data
  
Flow and Catch 

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 46.8F and 73.8F, 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.


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).

Season Catch Pie Graph

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 44.0F to 60.9F, 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.
 Efficiency data
 
Flow and Catch

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 46.5F to 68.3F, 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).


Season Catch Pie Graph

Figure 11. Relative catch of all non-salmonid species captured at Grayson between January 5 and June 17, 2010 (Note: Data excludes lamprey catch).

Flow and Catch
Figure 12. Daily Chinook salmon catch at Grayson and Tuolumne River flow at La Grange (LGN) and Modesto (MOD), 2010.


 
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 44.6F to 74.3F, 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.
Chinook salmon Table
Table 5. Net passage counts for winter-run/spring-run Chinook salmon between January 31 and June 23, 2010 at the Stanislaus River Weir.
Chinook salmon Table

 
San Joaquin Conditions
 
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 72.9F and 78.0F at Vernalis; between 66.7F and 80.1F at Mossdale; and between 74.8F and 80.2F 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).


Flow 

Figure 13. San Joaquin River flow at Vernalis, from July 1, 2009 through July 21, 2010.


Temperature 
Figure 14. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready, from July 1, 2009 through July 21, 2010.

 
D.O.
 
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).


Temperature
Temperature
Temperature

Figure 16. San Joaquin River daily average water temperature at Rough n' Ready Island, Mossdale, and Vernalis, January through July, (2007-2010).


 
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).



Exports 

Figure 17. Daily exports at the Federal and State pumping stations, from July 1, 2009 through July 21, 2010.

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