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Volume 2010/11, Issue 15July 6, 2011
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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
Merced River Conditions
San Joaquin River Juvenile Migration Monitoring
San Joaquin River Conditions
Delta Exports
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July 19 - 22

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 September 20-21

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FISHBIO

Bluegill Sunfish
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Key Highlights
May 23 - June 19, 2011

Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) and a total of 63 O. mykiss were captured during the reporting period, bringing the season total to 726.

Stanislaus River Juvenile Migration Monitoring continued at Oakdale (RM 40) and a total of 51 Chinook salmon were captured during the reporting period, bringing the season total to 42,467.

Monitoring at Caswell State Park (RM 8) continued and a total of 45 Chinook salmon were captured during the reporting period, bringing the season total to 594.

Tuolumne River Juvenile Migration Monitoring continued at Waterford (RM 30) and a total of 146 Chinook salmon were captured during the reporting period, bringing the season total to 4,368.

Monitoring at Grayson (RM 5) continued during the reporting period and a total of 62 Chinook salmon were captured, bringing the season total to 1,639.

Mokelumne River Juvenile Migration Monitoring at Vino Farms (RM 54) continued, and a total of 179 Chinook salmon and 56 O. mykiss were captured during the reporting period, bringing the season totals to 29,801 and 108, respectively.

Monitoring at Golf (RM 38) continued, and a total of 308 Chinook salmon and 58 O. mykiss were captured during the reporting period, increasing the season total to 3,796 and 88, respectively.

Monitoring at the Woodbridge Bypass trap (RM 38) began on June 13 and a total of 19 Chinook salmon were captured during the reporting period.

Merced River. No fish monitoring data were available for the reporting period.

San Joaquin River Juvenile Migration Monitoring Vernalis Adaptive Management Plan (VAMP) concluded acoustic tagging during the reporting period.

A total of 1,647 naturally spawned juvenile Chinook salmon were captured at Mossdale during the reporting period, increasing the season total to 3,126.

San Joaquin River Conditions. San Joaquin River flows at Vernalis fluctuated from 9,636 cfs to 11,333 cfs. Water temperatures in the San Joaquin River ranged from 57.5F to 63.7F at Vernalis, and from 58.9F to 67.4F at Mossdale. Average daily dissolved oxygen (DO) in the San Joaquin River ranged from 8.6 mg/L to 9.5 mg/L at Mossdale, and from 8.5 mg/L to 9.3 mg/L at Rough 'n Ready.

Delta Exports. Combined total exports (state and federal pumps) increased during the reporting period, ranging from 2,138 cfs to 9,991 cfs.


 
2010/11 Calaveras River Juvenile Migration Monitoring

The Calaveras River rotary screw trap at Shelton Road (RM 28) was operated eleven

O. mykiss

Figure 1. O. mykiss captured in the Calaveras River rotary screw trap at Shelton Rd.

days between May 23 and June 19 and a total of 63 O. mykiss were captured, increasing the season total to 726 (Figure 1). Of the O. mykiss captured, 54 were YOY (>100 mm) and were either rated as parr (n=25) or silvery parr (n=29), and nine were Age 1+ (100-299 mm), rated as silvery parr (n=8) or smolt (n=1). Average forklengths and weights are provided for the O. mykiss in Table 1.

No Chinook salmon have been captured this season.

 

Instantaneous temperature recorded at the trap ranged from 52.8F to 57.9F, and turbidity ranged from 0.57 NTU to 7.20 NTU. Daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) fluctuated between 105 cfs and 279 cfs, and at Bellota (MRS) flow fluctuated between 28 cfs and 123 cfs.

No trap efficiency experiments were conducted during the reporting period. 

 

Table 1. Biosampling data for O. mykiss captured at Shelton Road between May 23 and June 19, 2011. Parentheses indicate range.

 

Catch Table

 Flow and Catch   

Figure 2. Daily O. mykiss catch at Shelton Road, Calaveras River flow recorded at New Hogan Dam (NHG) and Cosgrove Creek (COS) combined, and flow recorded at Bellota (MRS), between November 1, 2010 and June 19, 2011.


 
2011 Stanislaus River Juvenile Migration Monitoring

The Stanislaus River rotary screw trap at Oakdale (RM 40) sampled continuously during the reporting period. A total of 51 juvenile Chinook salmon were captured, bringing the season total to 42,467. Daily catch of Chinook salmon ranged between zero and nine individuals. Average forklengths and weights of Chinook salmon are provided in Table 2 for the 49 Chinook that were measured. All measured Chinook were smolts (n=49).

 

No O. mykiss were captured during the reporting period. The season total remains at 21.

 

Table 2. Biosampling data for Chinook salmon and O. mykiss captured and measured at Oakdale between May 23 and June 19, 2011.

Catch Table  

Instantaneous temperature recorded at the trap ranged from 50.3F to 53.6F, and turbidity ranged from 0.32 NTU to 4.87 NTU (Figure 4). Daily average flow at Goodwin Dam (GDW) increased from 1,510 cfs and 2,070 cfs, and flow at Ripon (RIP) ranged from 1,539 cfs to 2,071 cfs (Figure 3).

 

No trap efficiency experiments were conducted during the reporting period.

 

 Flow and Catch

Figure 3. Daily Chinook salmon catch at Oakdale, and Stanislaus River flow recorded at Goodwin Dam (GDW) and Ripon (RIP) in 2011.

 

turbidity and catch

Figure 4. Daily Chinook salmon catch at Oakdale in relation to instantaneous turbidity recorded at the trap in 2011.

 

The Stanislaus River rotary screw trap at Caswell State Park (RM 8) sampled continuously during the reporting period and a total of 45 juvenile Chinook salmon were captured, increasing the season total to 594. Daily catch ranged between zero and eight Chinook salmon (Figure 5).

 

One O. mykiss was captured during the reporting period increasing the season total to two.

 

No trap efficiency experiments were conducted during the reporting period.

 

Instantaneous temperature recorded at the trap ranged from 54.3F and 59.5F, and turbidity ranged from 2.04 NTU to 4.72 NTU. Daily average flow at Ripon (RIP) ranged from to 1,539 cfs to 2,071 cfs.

 

Flow and Catch

Figure 5. Daily Chinook salmon catch at Caswell, and Stanislaus River flow recorded at Ripon (RIP) in 2011.


 
2010/11 Tuolumne River Juvenile Migration Monitoring

  

Processing Rotary Screw trap

Figure 6. Processing the Tuolumne River rotary screw trap at Waterford.

 

 

The Tuolumne River rotary screw trap at Waterford (RM 30) operated continuously during the reporting period (Figure 6). A total of 146 juvenile Chinook salmon were captured bringing the season total to 4,368. Daily catch ranged between zero and eighteen Chinook. Average forklengths and weights are provided in Table 3 for 140 of the Chinook salmon. The majority of the measured Chinook were smolts (n=138), but parr (n=2) were also recorded.

 

No O. mykiss were captured during this reporting period.

 

 

 

 

Table 3. Biosampling data for Chinook salmon captured and measured at Waterford between May 23 and June 19, 2011. Parentheses indicate range.

Catch Table  

Instantaneous temperature taken at the trap ranged from 50.5F to 55.2F, and turbidity ranged from 0.41 NTU to 2.36 NTU. Daily average flow at La Grange (LGN) fluctuated from 2,970 cfs to 7,020 cfs (Figure 7).

 

No trap efficiency experiments were conducted during the reporting period.

 

 Flow and Catch

Figure 7. Daily Chinook salmon catch at Waterford, and Tuolumne River flow recorded at La Grange (LGN) and Modesto (MOD) between December 1, 2010, and June 19, 2011.

 

 

Juvenile Chinook salmon

Figure 8. Chinook salmon captured in the Tuolumne River rotary screw trap at Grayson.

 

The Tuolumne River rotary screw traps at Grayson (RM 5) sampled continuously during the reporting period and catch at Grayson continues to be higher than during the previous two years. A total of 62 Chinook salmon were captured, bringing the season total to 1,639 (Figure 8). All measured Chinook salmon were smolts (n=61), and average forklengths and weights are provided in Table 4.

No O. mykiss were captured during this reporting period.

 



Table 4. Biosampling data for Chinook salmon captured and measured at Grayson between May 23 and June 19, 2011. Parentheses indicate range.

Catch Table 

Instantaneous temperature taken at the trap ranged from 52.8F to 60.2F, and turbidity ranged from 0.71 NTU to 3.68 NTU. Daily average flow at Modesto (MOD) fluctuated from 3,240 cfs to 6,400 cfs (Figure 9).

 

No trap efficiency experiments were conducted during the reporting period.

 

 Flow and Catch

Figure 9. Daily Chinook salmon catch at Grayson, and Tuolumne River flow recorded at La Grange (LGN) and Modesto (MOD) between January 1 and June 19, 2011.



2010/11 Mokelumne River Juvenile Migration Monitoring

The Mokelumne River rotary screw trap at Vino Farms (RM 54) was sampled intermittently, and a total of 179 juvenile Chinook salmon were captured during the reporting period, bringing the season total to 29,801.

Average daily flow from Camanche Reservoir (CMN) fluctuated during the reporting period ranging from 1,403 cfs to 2,051 cfs (Figure 10). Instantaneous temperature ranged from 54.5F to 58.1F, and instantaneous turbidity ranged between 1.81 NTU and 4.49 NTU.

A total of 56 O. mykiss were captured during the reporting period, increasing the season total to 108.

 

Flow and Catch

Figure 10. Daily juvenile Chinook catch at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir (CMN), between December 1, 2010, and June 19, 2011.

The Mokelumne River rotary screw trap at Golf (RM 38) continued intermittent monitoring during the reporting period and a total of 308 juvenile Chinook salmon were captured, increasing the season total to 3,796.

Average daily flow at Woodbridge Dam (WBR) fluctuated during the reporting period ranging from 1,059 cfs to 1,780 cfs (Figure 11). Instantaneous temperature ranged between 55.2F and 62.1F, and instantaneous turbidity ranged between 2.95 NTU and 4.86 NTU.

A total of 58 O. mykiss were captured during the reporting period increasing the season total to 88.

 

Flow and Catch

Figure 11. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Woodbridge Dam (WBR), between January 1 and June 19, 2011.

The Mokelumne River rotary screw trap at the Woodbridge Bypass (RM 38) was installed and intermittent monitoring began on June 13, 2011. A total of 19 juvenile Chinook salmon were captured through the end of the reporting period.

Average daily flow at Woodbridge Dam (WBR) fluctuated during the reporting period ranging from 1,059 cfs to 1,780 cfs (Figure 12). Instantaneous temperature ranged between 60.3F and 61.9F, and instantaneous turbidity ranged between 3.57 NTU and 4.59 NTU.

A total of 27 O. mykiss were captured during the reporting period.



Flow and Catch

Figure 12. Daily juvenile Chinook catches at Golf, and Mokelumne River flow recorded at Woodbridge Dam (WBR), between June 1 and June 19, 2011.


 
Merced River Conditions

Flow in the Merced River at Cressy (CRS; RM 52) fluctuated between 662 cfs and 3,443 cfs during reporting period. Flow at Stevinson (MST; RM 5) fluctuated between 790 cfs and 2,332 cfs (Figure 13). Water temperature in the Merced River ranged from 54.9F to 67.1F at Cressy, and from 56.5F to 71.3F at Stevinson (Figure 14).

Flow  

Figure 13. Daily average flows (cfs) recorded in the Merced River at Cressy (CRS) and Stevinson (MST) in 2010 and 2011.

Temperature

Figure 14. Daily average water temperatures (F) recorded in the Merced River at Cressy (CRS) and Stevinson (MST) in 2010 and 2011. 


 
2011 San Joaquin River Juvenile Migration Monitoring

The California Department of Fish and Game continued Kodiak trawling on the San Joaquin River near Mossdale (i.e. the Mossdale Trawl). Twenty days of trawling (with between 7 and 15 tows per day) were conducted between May 23 and June 19. A total of 1,647 naturally spawned juvenile Chinook salmon were captured during the reporting period, increasing the season total to 3,126. A total 247 hatchery origin Chinook salmon were also captured during the reporting period. Daily catch ranged between 7 and 247 Chinook (Figure 15).

Vernalis Adaptive Management Plan (VAMP) team members concluded implanting HTI LD acoustic tags in O. mykiss during the reporting period for the six-year study. A total of five release groups of 480 acoustically tagged O. mykiss were conducted.

VAMP team members concluded implanting HTI LM acoustic tags in Chinook salmon and a total of five release groups of 480 Chinook salmon were conducted.


Trawling Catch

Figure 15. Chinook salmon catch (per 10 tows) at the Mossdale Trawl and San Joaquin River flow recorded by Vernalis (VNS), 2011.


 
San Joaquin River Conditions

During the reporting period, flow in the San Joaquin River at Vernalis fluctuated from 9,636 cfs to 11,333 cfs (Figure 16). Water temperature in the San Joaquin River ranged from 57.5F to 63.7F at Vernalis, from 58.9F to 67.4F at Mossdale, and from 59.9F to 67.7F at Rough 'n Ready Island (Figure 17). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 8.5 mg/L to 9.3 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 8.6 mg/L to 9.5 mg/L at Mossdale (Figure 18).

 

Flow 

Figure 16. San Joaquin River flow at Vernalis from June 1, 2010, through June 19, 2011.

Temperature   

Figure 17. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready from June 1, 2010, through June 19, 2011.

Dissolved Oxygen 

Figure 18. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready, from June 1, 2010, through June 19, 2011.



Delta Exports


Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) ranged between 965 cfs and 4,187 cfs (Figure 19). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) increased from 1,129 cfs and 6,663 cfs. Combined total exports (state and federal pumps)

during this period increased from 2,138 cfs to 9,991 cfs.

 

Exports

Figure 19. Daily exports at the state and federal pumping stations from June 1, 2010, through June 19, 2011.

 


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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.