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Volume 2013/14, Issue 11
| February 25, 2014 |
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Salmonid Restoration Conference
March 19-22
Cal-Neva AFS Conference
March 27-29
Central Valley Tour
April 23-25
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Key Highlights
February 3, 2014 - February 16, 2014
Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) and a total of 20 O. mykiss were captured, increasing the season total to 132.
Stanislaus River Juvenile Migration Monitoring continued at Oakdale (RM 40) and a total of 6,427 Chinook salmon were captured, increasing the season total to 39,917. Monitoring at Caswell Memorial State Park (RM 9) continued and a total of 152 Chinook salmon were captured, increasing the season total to 404.
Tuolumne River Juvenile Migration Monitoring continued at Waterford (RM 30) and a total of 1,633 Chinook salmon were captured, increasing the season total to 2,294. No Chinook salmon were captured at Grayson (RM 5).
Mokelumne River Juvenile Migration Monitoring continued at Vino Farms (RM 54) and a total of 3,342 Chinook salmon were captured, increasing the season total to 8,712. Monitoring continued at Golf (RM 38) and a total of 142 Chinook salmon were captured, increasing the season total to 169.
Stanislaus River Weir Monitoring continued and 5,457 Chinook salmon have passed upstream through the weir this season.
Tuolumne River Weir Monitoring continued and 3,738 Chinook salmon have passed upstream through the weir this season.
San Joaquin River Conditions. San Joaquin River flow at Vernalis ranged from 861 cfs to 1,007 cfs. Daily average water temperature in the San Joaquin River ranged from 49.5�F to 59.8�F at Vernalis, and from 50.2�F to 60.2�F at Mossdale. Daily average dissolved oxygen (DO) in the San Joaquin River ranged from 9.1 mg/L to 11.5 mg/L at Mossdale, and from 8.3 mg/L to 10.1 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island).
Delta Exports. Combined total exports (state and federal pumps) increased during the reporting period, ranging from 445 cfs to 6,542 cfs.
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2013/14 Calaveras River Juvenile Migration Monitoring
The Calaveras River rotary screw trap at Shelton Road (RM 28) operated eight days between February 3 and February 16, and a total of 20 O. mykiss were captured,  increasing the season total to 132. Daily catches ranged from 0 to 9 individuals (Figure 1), and all O. mykiss captured were Age 1+ (100-299 mm) and were rated as parr (n=2) or silvery parr (n=17). Average forklengths and weights of O. mykiss are provided in Table 1.
No Chinook salmon were captured and the season total remains at 11.
Instantaneous temperatures recorded at the trap ranged from 48.5�F to 55.4�F, and turbidity ranged from 0.82 NTU to 2.81 NTU. During the reporting period, daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) decreased from 45 cfs to 10 cfs, and at Bellota (MRS) flow ranged between 2 cfs and 30 cfs (Figure 1).
Table 1. Biosampling data for O. mykiss captured at Shelton Road between February 3, 2014 and February 16, 2014. Parentheses indicates range.
Figure 1. Daily O. mykiss catch at Shelton Road, and Calaveras River flow recorded by New Hogan Dam and Cosgrove Creek combined and flow recorded at Bellota, in 2013/2014.
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2014 Stanislaus River Juvenile Migration Monitoring
Stanislaus River rotary screw trap monitoring at Oakdale (RM 40) continued, and a total of 6,427 Chinook salmon were captured, increasing the season total to 39,917. Average forklengths and weights of all Chinook salmon are provided in Table 2. Most of the fish measured were fry (n = 1,315), but parr (n=5) and smolt (n=14) were also captured.
Table 2. Biosampling data for Chinook salmon captured and measured at Oakdale between February 3 and February 16, 2014. Parentheses indicate range.
One O. mykiss was captured during the reporting period, increasing the season total to six.
 Instantaneous temperatures recorded at the trap ranged from 46.5�F to 54.1�F, and instantaneous turbidity ranged from 0.77 NTU to 2.39 NTU. Daily average flow at Goodwin Dam (GDW) ranged from 201 cfs to 354 cfs, and flow ranged from 250 cfs to 352 cfs at Ripon (RIP) (Figure 2).
Four trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin green (CFG).
Preliminary estimates of capture efficiency ranged from 16.0 - 19.2% at flows of approximately 300-350 cfs and from 21.8-24.6% at flows of ~200 cfs (Table 3). A total of eleven trap efficiency evaluations have been conducted this season.
Table 3. Trap efficiency tests conducted at Oakdale between February 3 and February 16, 2014.
Figure 2. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam and Ripon, in 2013/2014.
The Stanislaus River rotary screw traps at Caswell Memorial State Park (RM 9) sampled 11 days during the reporting period and a total of 152 juvenile Chinook
salmon were captured, increasing the season total to 404.
No O. mykiss have been captured.
Instantaneous temperature taken at the trap ranged from 45.1�F to 56.3�F, and instantaneous turbidity ranged from 1.98 NTU to 4.82 NTU. Instantaneous dissolved oxygen measured at the trap ranged from 9.73 mg/L to 13.12 mg/L.
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2014 Tuolumne River Juvenile Migration Monitoring
Tuolumne River rotary screw trap monitoring at Waterford (RM 30) continued and a total of 1,633 Chinook salmon were captured, increasing the season total to 2,294. Average forklengths and weights of all Chinook salmon are provided in Table 4. Most of the fish measured were fry (n=606), but parr (n=5) and smolt (n=4) were also measured.
Table 4. Biosampling data for Chinook salmon captured and measured at Waterford between February 3 and February 16, 2014. Parentheses indicate range.
 No O. mykiss were captured during the reporting period.
Instantaneous temperature taken at the trap ranged from 48.3�F to 57.5�F, and turbidity ranged from 0.39 NTU to 2.18 NTU. Daily average flow at La Grange (LGN) was stable between 160 cfs and 164 cfs (Figure 3).
Four trap efficiency evaluations were conducted during the reporting period with naturally spawned juvenile Chinook salmon marked caudal fin orange (CFO). Preliminary estimates of capture efficiency ranged from 9.5% to 19.2% at flows of ~160 cfs (Table 5).
Table 5. Trap efficiency tests conducted at Waterford between February 3 and February 16, 2014.
Figure 3. Daily Chinook salmon catch at Waterford and Tuolumne River flow recorded at La Grange (LGN) between January 1 and February 16, 2014.
Tuolumne River rotary screw trap monitoring at Grayson (RM 5) continued during the reporting period and no Chinook salmon were captured. The season total remains at zero. Trap efficiency has not yet been evaluated this season pending allocation of hatchery fish from Merced River Hatchery, a request that has been under review since December 18.
Instantaneous temperatures recorded at the trap ranged from 48.2�F to 60.2�F, and turbidity ranged from 0.74 NTU to 3.96 NTU. Daily average flow at Modesto (MOD) was stable during the reporting period, ranging from 196 cfs to 237 cfs.
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2013/14 Mokelumne River Juvenile Migration Monitoring
Mokelumne River rotary screw trap monitoring at Vino Farms (RM 54) continued intermittently during the reporting period. A total of 3,342 juvenile Chinook salmon were captured, increasing the season total to 8,712.
Average daily flow from Camanche Reservoir (CMN) ranged from 254 cfs to 255 cfs (Figure 4). Instantaneous temperatures ranged between 48.4�F and 52.7�F, and instantaneous turbidity ranged between 1.66 NTU and 2.06 NTU
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Figure 4. Daily juvenile Chinook catches at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir between December 1, 2013, and February 16, 2014.
Mokelumne River rotary screw trap at Golf (RM 38) continued sampling intermittently during the reporting period. A total of 142 Chinook salmon were captured, increasing the season total to 169 (Figure 5).
Instantaneous temperature ranged between 48.6�F and 55.0�F, and instantaneous turbidity ranged between 1.55 NTU and 5.83 NTU.
Figure 5. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Camanche Reservoir between January 1 and February 16, 2014.
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2013 Stanislaus River Weir Adult Migration Monitoring
A total of 2 Chinook salmon were detected passing upstream of the Stanislaus River Weir (RM 31) between February 3 and February 16, increasing the season total to 5,457. Daily passage ranged between 0 and 1 Chinook salmon (Figure 6).
Two O. mykiss were detected passing upstream during the reporting period, increasing the season total to 33. Ten of the O. mykiss observed this season have been positively identified as adipose fin clipped.
Instantaneous water temperature measured at the weir ranged between 50.5˚F and 57.2˚F, and daily average water temperature at Ripon (RPN; RM 15) ranged between 49.7˚F and 57.6˚F. Instantaneous turbidity ranged between 0.94 NTU and 2.14 NTU. Instantaneous dissolved oxygen at the weir ranged between 10.64 mg/L and 12.31 mg/L, and daily average dissolved oxygen at Ripon (RPN; RM 15) ranged from 9.73 mg/L to 11.74 mg/L.
Daily average flows in the Stanislaus River at Goodwin Dam (GDW; RM 58) ranged from 201 cfs to 354 cfs. Flows at Ripon (RIP; RM 15) ranged from 250 cfs to 352 cfs. Note: flows downstream of Goodwin Dam may differ from dam releases due to irrigation, precipitation, and other factors.Table 6. Annual fall-run Chinook passage at the Stanislaus River weir, 2003-2013.
Figure 6. 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), 2013.
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2013 Tuolumne River Weir Adult Migration Monitoring
No Chinook salmon were detected at the Tuolumne River weir (RM 24) during February 3 through February 6. Equipment was vandalized on February 7 and a video system is temporarily in use until the Vaki Riverwatcher is back online. Counts are not yet available from February 6 through February 16 due to the time required to review video footage. The season total remains at 3,738.
No O. mykiss have been detected at the Tuolumne River weir this season.
Daily average flow in the Tuolumne River ranged from 160 cfs to 164 cfs at La Grange (LGN; RM 50) and 196 cfs and 237 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 between 50.2˚F and 59.3˚F and daily average water temperature at Modesto (MOD; RM 17) ranged between 51.4˚F and 58.3˚F. Instantaneous turbidity ranged between 0.67 NTU and 2.05 NTU, and instantaneous dissolved oxygen ranged between 10.08 mg/L and 11.70 mg/L.
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San Joaquin River Conditions
During the reporting period, flow in the San Joaquin River at Vernalis ranged from 861 cfs to 1,007 cfs (Figure 7). Water temperature in the San Joaquin River ranged from 49.5�F to 59.8�F at Vernalis, from 50.2�F to 60.2�F at Mossdale, and from 51.0�F to 54.4�F at Rough 'n Ready Island (Figure 8). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 8.3 mg/L to 10.1 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 9.1 mg/L to 11.5 mg/L at Mossdale (Figure 9).
Figure 7. San Joaquin River flow at Vernalis from February 1, 2013, and February 16, 2014.
Figure 8. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready from February 1, 2013, and February 16, 2014.
Figure 9. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready, from February 1, 2013, and February 16, 2014.
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Delta Exports
Mean daily pumping at the C.W. Jones Pumping Plant (federal pumps previously known as Tracy Pumping Plant) increased from 242 cfs to 2,596 cfs (Figure 10). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) increased from 188 cfs to 4,000 cfs. Combined total exports (state and federal pumps) during this period increased from 445 cfs to 6,542 cfs.
Figure 10. Daily exports at the state and federal pumping stations from February 1, 2013, and February 16, 2014.
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