Volume 2010, Issue 14
| May 21, 2010 |
|
2010 VAMP Period:
April 23 - May 23
ASLO & NABS Meeting:
June 6-11
|
|
Photo by FISHBIO.
|
|
Key Highlights
Calaveras
River Juvenile Migration Monitoring. A total of 482 O. mykiss were captured at Shelton Road (RM 28) increasing the
season total to 2,582.
Mokelumne
River Juvenile Migration Monitoring. A total of 72
Chinook salmon were captured at Vino Farms (RM 54) increasing the season total
to 8,336. 64 Chinook salmon were captured at Golf (RM 38) increasing the season
total to 203, and 45 Chinook salmon were captured at Bypass (RM 38) increasing
the season total to 114.
San Joaquin River
Juvenile Migration Monitoring. A total of 42 juvenile Chinook salmon were captured at Mossdale during
the reporting period, increasing the season total to 201.
Stanislaus
River Juvenile Migration Monitoring. On May 14 seining surveys
were conducted at various locations between Oakdale (RM 40) and the confluence
with the San Joaquin River. No Chinook salmon were captured during the sampling.
A
total of 464 Chinook salmon were captured in the Oakdale rotary screw trap (RM
40) increasing the season total to 36,256.
At Caswell
State Park (RM 8), data is not yet available for the reporting period.
Tuolumne
River Juvenile Migration Monitoring. A total of 297
Chinook salmon were captured at Waterford (RM 30) increasing the season total
to 1,879. Three Chinook salmon were captured at Grayson (RM 5) increasing the
season total to 28.
Weir
Monitoring. No Chinook salmon were detected as they passed upstream of
the Stanislaus River Weir.
San Joaquin River
Conditions. San Joaquin River flows at Vernalis
ranged from 4,697 cfs to 5,933 cfs. Water temperatures in the San Joaquin River
ranged between 57.1�F and
62.8�F and average daily
dissolved oxygen (DO) ranged between 9.3 mg/L and 9.6 mg/L.
Delta Exports. Combined total
exports (state and federal pumps) fluctuated during
the reporting period ranging from 820 cfs and 2,347 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 May 3 and May 16. A total of 482 O. mykiss were captured, increasing the
season total to 2,582. Daily catch ranged between 15 and 148 O. mykiss (Figure 1). Most of the O. mykiss captured, (n=294) were YOY
(<100 mm) and were rated as fry (n=15), parr (n=272), and silvery parr
(n=7). One Age 1+ (100-299 mm) was captured and was rated as smolt and one
Adult (>300 mm) was captured. Average forklengths and weights are provided
in table 1 for 431 of O. mykiss measured.
No Chinook salmon have been captured this
season.
Instantaneous
temperatures recorded at the trap ranged from 50�F to 62�F (Figure 2), and
turbidity ranged from 0.16 NTU to 1.53 NTU. Daily average flow fluctuated
between 55 cfs and 144 cfs at New Hogan Dam (NHG), between 1 cfs and 7 cfs at
Cosgrove Creek (COS), and between 9 cfs and 35 cfs at Bellota (MRS).
Table 1.
Biosampling data for O. mykiss captured
and measured at Shelton Road between May 3 and May 16, 2010. Parentheses
indicate range.
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 May
16, 2010.
Figure 2. Daily O. mykiss catch at Shelton Road and Calaveras River temperature recorded instantaneously
at trap location between November 1, 2009 and May 16, 2010.
|
2009/10 Mokelumne River Juvenile Migration Monitoring
The Mokelumne River rotary screw trap at Vino Farms (RM 54) continued to sample
intermittently between May 3 and May 16 and a total of 72 Chinook salmon were
captured increasing the season total to 8,336.
Average
daily flows from Camanche Reservoir (CMN) were relatively stable between 1,372
cfs and 1,426 cfs (Figure 3). Instantaneous temperature ranged between 53.8�F and 56.3�F and instantaneous turbidity ranged between
1.87 NTU and 3.17 NTU.
Two O. mykiss were captured at Vino Farms during the report period
increasing the season total to 47.
Figure 3. Daily Chinook catches at Vino
Farms and Mokelumne River flow recorded by Camanche Reservior (CMN), between
December 1, 2009 and May 16, 2010. The Mokelumne River rotary
screw trap at Golf (RM 38) continued to sample intermittently between May 3 and May
16. A total of 64 Chinook salmon were captured
increasing the season total to 203 (Figure 4). Average daily flow
recorded at Woodbridge (WBR) was relatively stable between 1,106 cfs and 1,134
cfs. Instantaneous temperature ranged between 54.9�F and 58.3�F and
instantaneous turbidity ranged between 2.47 NTU and 4.00 NTU. Three O. mykiss were captured at Golf during this reporting period
increasing the season total to 697 (Note: One of the O. mykiss had clipped adipose fins indicating hatchery origin). Figure 4. Daily Chinook catches at Golf and Mokelumne
River flow recorded at Woodbridge (WBR), between December 1, 2009 and May 16,
2010. The Mokelumne River rotary
screw trap at Bypass (RM 38) continued
sampling during the reporting period. 45 Chinook salmon were captured during the reporting period increasing
the season total to 114 (Figure 5). Average daily flows
recorded at Woodbridge (WBR) was stable between 1,106 cfs and 1,134 cfs. Instantaneous temperature ranged between 54.7�F and 58.6�F and
instantaneous turbidity ranged between 2.32 NTU and 3.17 NTU. Eight O. mykiss were captured at Bypass during this reporting period
increasing the season total to 92 (Note: Two of the O. mykiss had clipped adipose fins suggesting hatchery origin).
Figure 5. Daily Chinook catches at Bypass and
Mokelumne River flow recorded at Woodbridge (WBR), between April 14 and May 16,
2010.
|
San Joaquin River Juvenile Migration Monitoring
California Department of Fish and Game conducted ten days (ten tows per
day) of Kodiak Trawling (Mossdale Trawl) on the San Joaquin River near Mossdale between May 3
and May 16. A total of 42 juvenile Chinook salmon were captured, and catch
ranged between zero and nine Chinook per ten tows (Figure 6).
Figure 6. Chinook salmon catch (per ten
tows) at the Mossdale Trawl and San Joaquin River flow recorded by Vernalis
(VNS), 2010.
|
|
2010 Stanislaus River Juvenile Migration Monitoring
The Stanislaus River rotary screw trap at Oakdale (RM 40) sampled continuously between May 3 and
May 16. A total of 464 juvenile Chinook salmon were captured during the
reporting period increasing the season total to 36,256. Daily catch ranged
between 15 and 60 Chinook salmon. Average forklengths and weights of
Chinook salmon are provided in Table 2 for 443 fish that were measured. Most of
the measured Chinook were smolts (n=427), including 8 larger fish (i.e., >
100 mm), but there were also fry (n=9) and parr (n=7).
No O. mykiss were captured at Oakdale
during the reporting period. Nine O.
mykiss have been captured so far this season.
Table
2. Biosampling data for Chinook salmon captured and measured at Oakdale between May 3 and May 16, 2010.
Instantaneous temperature recorded
at the trap ranged from 51.6�F to 57.3�F, and turbidity ranged from 0.10 NTU to
3.82 NTU. Daily average flow during the reporting period ranged between 876 cfs
and 1,028 cfs at Goodwin Dam (GDW) and 994 cfs to 1,032 cfs at Ripon (RIP)
(Figure 7).
No trap efficiency
experiments were conducted during the reporting period due to insufficient
daily catch.
Figure 7. Daily Chinook
salmon catch at Oakdale and Stanislaus River flow recorded at Goodwin Dam (GDW)
and Ripon (RIP), 2010.
Stanislaus River seining surveys were conducted on
May 14 at various locations between Oakdale (RM 40) and the confluence with the
San Joaquin River. No Chinook
salmon were captured. Average daily flow at Ripon was 1,006 cfs.
Data
is not yet available for the Stanislaus River rotary screw trap at Caswell
State Park (RM 8) for this reporting period.
|
2010 Tuolumne River Juvenile Migration Monitoring
The Tuolumne River rotary screw trap at Waterford (RM 30) operated
continuously between May 3 and May 16. A total of 297 juvenile Chinook salmon
were captured during the reporting period increasing the season total to 1,879.
Daily catch ranged between 3 and 51 Chinook salmon. Average
forklengths and weights of Chinook salmon are provided in Table 4 for 289 fish
that were measured. Most of the measured fish were smolt (n=286) but a few fry
(n=3) were also observed.
No O. mykiss have been captured so far this
season.
Table
4. Biosampling data for Chinook salmon captured and measured at Waterford
between May 3 and May 16, 2010. Parentheses indicate range.
Instantaneous temperature
taken at the trap ranged from 48.0�F to 57.4�F, and turbidity ranged from 0.14
NTU to 2.60 NTU. Daily average flow records from La Grange (LGN) ranged from
2,230 cfs to 3,300 cfs (Figure 8).
Due to insufficient daily
catch, no trap efficiency experiments were conducted during the reporting
period.
Figure 8. Daily Chinook salmon catch at Waterford and
Tuolumne River flow recorded by La Grange (LGN) and Modesto (MOD), 2010.
The Tuolumne
River rotary screw traps at Grayson (RM 5) sampled continuouslyFigure 9. Tuolumne River rotary screw trap at Grayson.  | between
May 3 and May 16. Three Chinook salmon were captured during the reporting
period increasing the season total to 28 (Figure 9).
No O. mykiss have been captured yet this
season.
Trap efficiency releases have not yet been conducted this season due to
insufficient daily catch.
Instantaneous
temperature taken at the trap ranged from 51.8�F to 58.3�F, and turbidity
ranged from 0.69 NTU to 9.29 NTU. Daily average flow at Modesto (MOD) has not
been available since April 21 (Figure 10).
Figure 10. Daily Chinook salmon catch at Grayson and Tuolumne
River flow at La Grange (LGN) and Modesto (MOD), 2010.
|
|
2009/10 Stanislaus River Weir Monitoring
Figure 11. Stanislaus River Weir.  | Between May 3 and May 16 no Chinook
salmon were detected passing upstream of the Stanislaus River Weir. Season total remains at 1,281 (Figure 11).
No
O. mykiss (170 mm) were detected
passing upstream during this reporting period. Nine O. mykiss have been detected so far this season.
Several non-salmonid species were observed with passage dominated by Sacramento sucker and Sacramento pikeminnow (Table 4).
. Table 4. Net passage counts for all species between May 3 and May 16, 2010 at
the
Stanislaus River Weir. |
Between May 3 and May 16, flows in the San Joaquin
River at Vernalis ranged from 4,697 cfs to 5,933 cfs (Figure 12). Water
temperatures in the San Joaquin River fluctuated between 57.1�F and 62.8�F at Vernalis; between 58.0�F and 64.1�F at Mossdale; and between 61.5�F and 65.6�F at Rough 'n Ready Island (Figure 13). Average daily dissolved oxygen
(DO) in the San Joaquin River fluctuated between 8.3 mg/L and 8.8 mg/L in the
deep water ship channel (measured at Rough 'n Ready Island) and fluctuated
between 9.3 mg/L and 9.6 mg/L at Mossdale (Figure 14).
Figure
12. San Joaquin River flow at Vernalis, May 1, 2009 through May 16, 2010.
Figure
13. San Joaquin River daily average water temperature at Vernalis, Mossdale,
and Rough 'n Ready, May 1, 2009 through May 16, 2010.
Figure
14. San Joaquin River daily average dissolved oxygen at Mossdale and Rough 'n
Ready, May 1, 2009 through May 16, 2010.
|
|
Delta Exports
Combined total exports (state and federal pumps) fluctuated during the reporting period ranging from 820 cfs to 2,347
cfs. Mean daily
pumping at the Harvey O. Banks Pumping Plant (state pumps) ranged from 0 cfs to
1,524 cfs due to maintenance. Mean daily pumping at the C.W. Jones Pumping
Plant (federal pumps previously known as Tracy Pumping Plant) ranged from 820
cfs to 1,468 cfs during the reporting period (Figure 15).
Figure
15. Daily exports at the Federal and State pumping stations, May 1, 2009
through May 16, 2010.
|
|
|
|
|
|
|
