Monitoring at Shelton Road (RM 28) ended for the season on July 15. The trap was

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

operated fifteen days during the reporting period, and a total of 8 O. mykiss were captured, increasing the season total to 734 (Figure 1). Of the O. mykiss measured, four were YOY (>100 mm) and were rated as silvery parr (n=4), and four were Age 1+ (100-299 mm), and rated as silvery parr (n=4). Average forklengths and weights are provided for the O. mykiss in Table 1.

No Chinook salmon were captured during the 2010/11 monitoring season.

Instantaneous temperature recorded at the trap ranged from 53.4�F to 55.4�F, and turbidity ranged from 0.70 NTU to 2.47 NTU. Daily average combined flow from New Hogan Dam (NHG) and Cosgrove Creek (COS) fluctuated between 252 cfs and 309 cfs, and at Bellota (MRS) flow fluctuated between 144 cfs and 212 cfs (Figure 2).

No trap efficiency experiments were conducted during the reporting period.

Table 1. Biosampling data for O. mykiss captured at Shelton Road between June 20 and July 15, 2011. Parentheses indicate range.

Figure 3. Removing the Stanislaus River rotary screw trap at Oakdale.

Daily average flow at Goodwin Dam (GDW) increased from 1,501 cfs and 2,548 cfs, and flow at Ripon (RIP) ranged from 1,526 cfs to 2,460 cfs (Figure 4). Instantaneous temperature recorded at the trap ranged from 52.7�F to 55.5�F, and turbidity ranged from 0.41 NTU to 1.52 NTU (Figure 5).

No trap efficiency experiments were conducted during the reporting period.

Figure 4. Daily Chinook salmon catch at Oakdale, and Stanislaus River flow recorded at Goodwin Dam (GDW) and Ripon (RIP) in 2011.

Figure 5. Daily Chinook salmon catch at Oakdale in relation to instantaneous turbidity recorded at the trap in 2011.

There is no new data to report for the Stanislaus River rotary screw trap at Caswell State Park (RM 8).

Figure 6. Tuolumne River rotary screw trap at Waterford raised for the season.

Rotary screw trap monitoring at Waterford (RM 30) ended for the season on June 30 (Figure 6). A total of 17 juvenile Chinook salmon were captured, bringing the season total to 4,394. Daily catch ranged between zero and five Chinook. Average forklengths and weights are provided in Table 3. All measured Chinook salmon were smolts (n=16).

No O. mykiss were captured during the 2010/11 monitoring season.

Table 3. Biosampling data for Chinook salmon captured and measured at Waterford between June 20 and June 30, 2011. Parentheses indicate range.

Instantaneous temperature taken at the trap ranged from 53.0�F to 57.8�F, and turbidity ranged from 0.51 NTU to 2.30 NTU. Daily average flow at La Grange (LGN) fluctuated from 1,160 cfs to 5,450 cfs (Figure 7).

No trap efficiency experiments were conducted during the reporting period.

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 30, 2011.

Rotary screw trap monitoring at Grayson (RM 5) ended for the season on June 30. A total of 6 Chinook salmon were captured, bringing the season total to 1,645. All measured Chinook salmon were smolts (n=6), and average forklengths and weights are provided in Table 4.

No O. mykiss were captured during the 2011 monitoring season.

Table 4. Biosampling data for Chinook salmon captured and measured at Grayson between June 20 and June 30, 2011. Parentheses indicate range.

Instantaneous temperature taken at the trap ranged from 56.6�F to 60.0�F, and turbidity ranged from 1.09 NTU to 4.05 NTU. Daily average flow at Modesto (MOD) fluctuated from 1,380 cfs to 4,890 cfs (Figure 8).

No trap efficiency experiments were conducted during the reporting period.

Figure 8. Daily Chinook salmon catch at Grayson, and Tuolumne River flow recorded at La Grange (LGN) and Modesto (MOD) between January 1 and June 30, 2011.

Rotary screw trap monitoring at Vino Farms (RM 54) ended for the season on June 27. A total of 5 juvenile Chinook salmon were captured during the reporting period, bringing the season total to 29,806.

Average daily flow from Camanche Reservoir (CMN) fluctuated during the reporting period ranging from 1,290 cfs to 4,962 cfs (Figure 9). Instantaneous temperature ranged from 57.2�F to 57.4�F, and instantaneous turbidity ranged between 2.09 NTU and 3.15 NTU.

A total of three O. mykiss were captured during the reporting period, increasing the season total to 111.

Flow in the Merced River at Cressy (CRS; RM 52) fluctuated between 143 cfs and 3,870 cfs during reporting period. Flow at Stevinson (MST; RM 5) fluctuated between 787 cfs and 2,599 cfs (Figure 11). Water temperature in the Merced River ranged from 59.7�F to 65.7�F at Cressy, and from 62.2�F to 69.3�F at Stevinson (Figure 12).

During the reporting period, flow in the San Joaquin River at Vernalis fluctuated from 8,806 cfs to 12,583 cfs (Figure 14). Water temperature in the San Joaquin River ranged from 64.0�F to 71.9�F at Vernalis, from 65.6�F to 78.3�F at Mossdale, and from 69.1�F to 75.9�F at Rough 'n Ready Island (Figure 15). Average daily dissolved oxygen (DO) in the San Joaquin River fluctuated from 7.5 mg/L to 9.3 mg/L in the deep-water ship channel (measured at Rough 'n Ready Island), and from 7.3 mg/L to 9.1 mg/L at Mossdale (Figure 16).