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June 26
through July 9, 2006, Report No.
12
Oakdale:
Between June 26 and July 9,
the Oakdale rotary screw trap sampled
eight out of 14 days. A
total of 167 juvenile Chinook salmon were captured, increasing the season total to 55,120
(Figure 1). Daily catch ranged from nine to 36 Chinook.
Average forklength was 90.0 mm and ranged from 62 mm to 110 mm. Average weight for captured Chinook was
8.5 g and
ranged from 6.9 g to 11.0 g.
Figure 1. Chinook
Catch at Oakdale versus Stanislaus River flow at Orange Blossom Bridge
(OBB).
Nine young-of-the-year
O. mykiss were
captured during the sampling period increasing the season
total to 51 (Table 1).
Table 1. Biosampling data
collected on O. mykiss captured at Oakdale between
July 26 and
July 9, 2006.
|
Date |
Forklength (mm) |
Weight (g) |
Smolt Index |
|
6/27/06 |
83 |
5.8 |
3 |
|
6/27/06 |
64 |
2.9 |
3 |
|
6/27/06 |
69 |
3.9 |
3 |
|
6/28/06 |
86 |
7.6 |
4 |
|
6/28/06 |
78 |
5.4 |
3 |
|
6/29/06 |
87 |
7.8 |
3 |
|
6/30/06 |
71 |
4.8 |
3 |
|
7/4/06 |
87 |
8.0 |
3 |
|
7/5/06 |
94 |
8.8 |
4 |
No trap efficiency tests
were
conducted at Oakdale during the sampling period.
Caswell:
The Caswell rotary screw traps
sampled eight out of 14 days between June 26 and July 9. A
total of 10 juvenile Chinook salmon were captured,
increasing the season total to 1,586 (Figure 2). Daily
catch ranged from zero to four Chinook. Average forklength
was 91.7 mm and ranged from 79 mm to 104 mm. Average weight
for captured Chinook was 8.9 g and ranged from 5.4 g to 11.1
g.
Figure 2. Chinook
Catch at Caswell versus Stanislaus River flow at Ripon (RIP).
No
O. mykiss
were captured at Caswell during the sampling
period.
Environmental Data:
Instantaneous water
temperature fluctuated between 54.8°F and 55.9°F at Oakdale
and between 61.2°F and 62.6°F at Caswell. Turbidity ranged
from 0.7 NTU to 1.4 NTU at Oakdale and from 2.1 NTU to 3.8 NTU at Caswell. During the sampling period, releases from
Goodwin Dam (GDW) ranged between 1,202 cfs and 1,323 cfs.
Flows at Orange Blossom Bridge (OBB; RM 46.9) ranged from
1,155 cfs to 1,295 cfs and at Ripon (RIP; RM 15.8) from
1,318 cfs to 1,665 cfs.
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