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Volume 2013/14, Issue 16
| July 8, 2014 |
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Annual Symposium of the Fisheries Society of the British IslesJuly 7-10
Joint Meeting of Ichthyologists & Herpetologists
July 30 - August 3
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Key Highlights
May 26, 2014 - June 29, 2014
Calaveras River Juvenile Migration Monitoring continued at Shelton Road (RM 28) and a total of 26 O. mykiss were captured, increasing the season total to 1,108.
Stanislaus River Juvenile Migration Monitoring ended at Oakdale (RM 40) on June 27 and a total of 665 Chinook salmon were captured, increasing the season total to 80,811. No data were available for juvenile migration monitoring at Caswell Memorial State Park (RM 9) during the reporting period.
Mokelumne River Juvenile Migration Monitoring ended at Vino Farms (RM 54) on June 20 and a total of 90 Chinook salmon were captured, increasing the season total to 28,242. Monitoring ended at Golf (RM 38) on May 29 and a total of 11 Chinook salmon were captured, increasing the season total to 1,347. Monitoring ended at the Bypass trap (RM 38) on June 20 and a total of 2,632 Chinook salmon were captured, increasing the season total to 37,720.
San Joaquin River Juvenile Migration Monitoring. The California Department of Fish and Wildlife (CDFW) continued the kodiak trawling surveys near Mossdale and 1 Chinook salmon was captured, increasing the season total to 1,351.
San Joaquin River Conditions. San Joaquin River flow at Vernalis decreased from 692 cfs to 219 cfs. Daily average water temperature in the San Joaquin River ranged from 69.6�F to 79.9�F at Vernalis, and from 71.0�F to 80.6�F at Mossdale. Daily average dissolved oxygen (DO) in the San Joaquin River ranged from 6.6 mg/L to 11.6 mg/L at Mossdale, and from 7.0 mg/L to 8.4 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island).
Delta Exports. Combined total exports (state and federal pumps) decreased during the reporting period, ranging from 572 cfs to 1,122 cfs.
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2013/14 Calaveras River Juvenile Migration Monitoring
SEWD rotary screw trap monitoring on the Calaveras River at Shelton Road (RM 28) continued intermittently between May 26 and June 29, and a total of 26 O. mykiss  were captured, increasing the season total to 1,108. Daily catches ranged from 0 to 6 individuals (Figure 1). Most O. mykiss captured were young-of-year and rated as parr (n=20), but Age 1+ (100-299 mm) were also observed and were rated as parr (n=2), silvery parr (n=2) and smolt (n=1). 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 58.0�F to 62.0�F, and turbidity ranged from 0.56 NTU to 2.51 NTU. During the reporting period, daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) ranged from 146 cfs to 244 cfs, and at Bellota (MRS) flow ranged between 38 cfs and 74 cfs (Figure 1).
Table 1. Biosampling data for O. mykiss captured at Shelton Road between May 26, 2014 and June 29, 2014. Parentheses indicate range.
Figure 1. For Nov. 2013 to June 2014: daily O. mykiss catch at Shelton Road (red), Calaveras River flow recorded by New Hogan Dam and Cosgrove Creek combined (blue), and flow recorded at Bellota (green).
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2014 Stanislaus River Juvenile Migration Monitoring
OID, SSJID and TDP rotary screw trap monitoring on the Stanislaus River at Oakdale (RM 40) ended on June 27. A total of 665 Chinook salmon were captured, increasing  the season total to 80,811. Daily catches ranged from 0 to 126 (Figure 2). Average forklengths and weights of all Chinook salmon are provided in Table 2. Most of the fish measured were smolt (n=343), but parr (n=4) were also captured.
Two O. mykiss were captured during the reporting period, increasing the season total to 35.
Instantaneous temperatures recorded at the trap ranged from 58.3�F to 66.5�F, and instantaneous turbidity ranged from 0.80 NTU to 2.58 NTU. Daily average flow at Goodwin Dam (GDW) ranged from 227 cfs to 406 cfs, and flow ranged from 264 cfs to 608 cfs at Ripon (RIP) (Figure 2).
Two trap efficiency evaluations were conducted during the reporting period. Preliminary estimates of capture efficiency were 12.4% and 5.4% at flows of 403 cfs and 263 cfs, respectively (Table 3). A total of 28 trap efficiency evaluations were conducted this season.
Table 2. Biosampling data for Chinook salmon captured and measured at Oakdale between May 26 and June 29, 2014. Parentheses indicate range.
Table 3. Trap efficiency tests conducted at Oakdale between May 26 and June 29, 2014.
Figure 2. Daily Chinook salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam and Ripon, in 2013/2014.
No data were available for the U.S. Fish and Wildlife Service juvenile migration monitoring at Caswell Memorial State Park (RM 9) during the reporting period.
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2013/14 Mokelumne River Juvenile Migration Monitoring
EBMUD rotary screw trap monitoring on the Mokelumne River at Vino Farms (RM 54) ended on June 20. A total of 90 juvenile Chinook salmon were captured, increasing the season total to 28,242.
Average daily flow from Camanche Reservoir (CMN) ranged from 210 cfs to 530 cfs (Figure 3). Instantaneous temperatures ranged between 57.4�F and 62.4�F, and instantaneous turbidity ranged between 1.29 NTU and 3.79 NTU.
Figure 3. Daily juvenile Chinook catches at Vino Farms and Mokelumne River flow recorded at Camanche Reservoir between December 1, 2013, and June 29, 2014.
EBMUD rotary screw trap monitoring on the Mokelumne River at Golf (RM 38) ended on May 29. A total of 11 Chinook salmon were captured, increasing the season total to 1,347 (Figure 4).Instantaneous temperature ranged between 68.2�F and 68.7�F, and instantaneous turbidity ranged between 2.22 NTU and 3.18 NTU.
Figure 4. Daily juvenile Chinook catches at Golf and Mokelumne River flow recorded at Camanche Reservoir between January 1 and June 29, 2014.
EBMUD monitoring at the Bypass trap (RM 38) on the Mokelumne River ended on June 20. A total of 2,632 Chinook salmon were captured, increasing the season total to 37,720 (Figure 5).
Instantaneous temperature ranged between 66.7�F and 71.8�F, and instantaneous turbidity ranged between 2.07 NTU and 3.81 NTU.
Figure 5. Daily juvenile Chinook catches at the Bypass trap and Mokelumne River flow recorded at Camanche Reservoir between April 1 and May 25, 2014.
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San Joaquin River Juvenile Migration Monitoring
The California Department of Fish and Wildlife continued kodiak trawling surveying on the San Joaquin River near Mossdale (i.e. the Mossdale Trawl). Sixteen days (10 tows per day) of trawling were conducted between May 26 and June 29. One juvenile Chinook salmon was captured, increasing the season total to 1,351. Catch ranged between 0 and 1 Chinook salmon per 10 tows (Figure 6).
Figure 6. Chinook salmon catch (per 10 tows) at the Mossdale Trawl and San Joaquin River flow recorded by Vernalis (VNS), 2014.
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San Joaquin River Conditions
During the reporting period, flow in the San Joaquin River at Vernalis decreased from 692 cfs to 219 cfs (Figure 7). Water temperature in the San Joaquin River ranged from 69.6�F to 79.9�F at Vernalis, from 71.0�F to 80.6�F at Mossdale, and from 71.9�F to 77.4�F at Rough 'n Ready Island (Figure 8). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 7.0 mg/L to 8.4 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 6.6 mg/L to 11.6 mg/L at Mossdale (Figure 9).
Figure 7. San Joaquin River flows at Vernalis between June 1, 2013, and June 29, 2014.
Figure 8. San Joaquin River daily average water temperature at Vernalis, Mossdale, and Rough 'n Ready between June 1, 2013, and June 29, 2014.
Figure 9. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n Ready between June 1, 2013, and June 29, 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) ranged from 0 cfs to 883 cfs (Figure 10). Mean daily pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 109 cfs to 866 cfs. Combined total exports (state and federal pumps) during this period ranged from 572 cfs to 1,122 cfs.
Figure 10. Daily exports at the state and federal pumping stations between June 1, 2013, and June 29, 2014.
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