February 28, 2005 Juvenile chum abundance continues to increases at Wood's Landing and Rivershore. Rough river conditions prevented us from seining Multnomah,Horsetail, and St. Cloud last week. The attached file contains a species breakdown by site per week. As of 2/27, we have sampled 725 entrapped and 49 stranded salmonids in our Ives Island study area. This compares with 269 entrapped and 4 stranded salmonids at the same time last year. The initial drop in Bonneville tailwater to 11.5 ft on February 21 produced 507 entrapped salmonids. Of the 774 salmon sampled this year, 649 have come from 2 entrapments, E507, E508, and S504 (which is E507 dried up). The attached file contains a species breakdown by date and site. If an entrapment's waters were replenished and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. A map of the sampling area with entrapments listed by site code is also attached (see map at stranding webpage). March 7, 2005 Emerging chum are still present at Wood's Landing, Rivershore, andMultnomah. We have yet to catch any juvenile chum at Horsetail or St.Cloud this year. The attached file contains a species breakdown by site per week. A map of this year's sand encroachment at Wood's Landing is also attached. This file should be opened with Excel. As of 3/6, we have sampled 1489 entrapped and 50 stranded salmonids in our Ives Island study area. This compares with 894 entrapped and 4 stranded at the same time last year. Of the total number of salmon sampled this year, 81.8% have come from one entrapment (E508). The attached file contains a species breakdown by date and site. If an entrapment's waters were replenished and the entrapment once again contained salmon, it was resampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. A map of the sampling area with entrapments listed by site code is also attached. March 16, 2005 Juvenile chum are now present at all five of our sampling sites. On March 7, we had the largest single day catch of chum at Multnomah since juvenile seining began there in 2003. The attached file contains a species breakdown by site per week. As of 3/16, we have sampled 2311 entrapped and 132 stranded salmonids in our Ives Island study area. This compares with 1931 entrapped and 123stranded at the same time last year. 75.8% of our entrapped salmon have come from one entrapment (E508) and 93.9% of our stranded salmon have come from one stranding site (which is E507 when it is dried up). The attached file contains a species breakdown by date and site. If an entrapment's waters were replenished and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. A map of the sampling area with entrapments listed by site code is also attached. April 15, 2005 We continue to catch juvenile chum at all five seining sites. Relative abundance and emergence timing of juvenile chum appears to be similar to past years with the exception last year's phenomenal catch at Wood's Landing. As of 4/15, we have sampled 5,904 salmonids out of entrapment sites and 157 salmonids stranded. This compares with 3,317 salmonids entrapped and 607 salmonids stranded at the same time last year. There was a drop in Bonneville tailwater from a high of 16.3 ft on April 6th to 12.1 ft of tailwater at the time of sampling on April 10th. This drop created two major entrapments (E501 and E504). These two entrapments yielded the highest single day entrapment total since this study began in 2000. 2959 salmonids were caught out of E501 (251 of which were chum) and 585 salmonids were caught out of E504 (29 of which were chum). Both of these entrapments still contained large numbers of unsampled salmon that we were unable to catch due to time constraints. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. During the week of April 17- 23 we caught at least one chum salmon at all index sites except St. Cloud. Relative abundance and emergence timing of juvenile chum appears to be similar to past years with the exception last year's phenomenal catch at Wood's Landing. As of 4/21, we have sampled 11069 entrapped and 158 stranded salmonids. This compares with 3,317 salmonids entrapped and 626 salmonids stranded by the same time last year. April 21, 2005 On 4/17, 4/18, and 4/20 a combined total of 5165 salmonids were retrieved from four entrapments, 290 were chum. Not all of the entrapped salmon could be captured. Entrapments E501 and E504 contained a minimum of 3,257 salmon (137 chum) and 439 salmon (30 chum), respectively. Both of these entrapments formed when tailwater levels dropped below 12.5 ft. E508 had a minimum of 880 salmon (89 chum) and formed when tailwater levels dropped below 12 ft., E503 contained a minimum of 599 salmonids of which 34 were chum. The attached file contains a species breakdown by date and site. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. May 2, 2005 All of our seining sites with the exception of Horsetail still produced juvenile chum this past week. Chum emergence is post peak at all of our seining sites and relative abundance continues to decline weekly. However, our catch of chinook "brights" has increased the past few weeks. As of 4/29, we have sampled 11,069 salmonids out of entrapment sites and 171 salmonids stranded. This compares to 4,746 salmonids entrapped and 630 salmonids stranded at the same time last year. There were minimal entrapment and stranding events this past week with increased flows below Bonneville. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. May 5, 2005 While juvenile chinook "brights" are still present at all five of our seining sites, only Rivershore and Multnomah continued to produce juvenile chum this past week. The attached file contains a species breakdown by site per week. As of 5/5, we have sampled 11623 salmonids out of entrapment sites and 172 salmonids stranded. This compares to 4747 salmonids entrapped and 634 salmonids stranded at the same time last year. This past week, we sampled 554 salmonids entrapped and 1 chinook stranded. Of the 554 entrapped, 490 came from one entrapment (E514). This site has been a major entrapment in past years. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. May 13, 2005 No juvenile chum were found at any of the five seining sites this past week. However, relatively large numbers of chinook "brights" are still present at all of the index sites. As of 5/13, we have sampled 11623 salmonids out of entrapment sites and 172 salmonids stranded. This compares to 5641 salmonids entrapped and 651 salmonids stranded at the same time last year. No salmonids were found entrapped or stranded this past week. Increased flows coupled with fluctuating river levels formed an entrapment (E516) that has been a major in past years, but no fish were found. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. May 20, 2005 No juvenile chum were found at any of the five index seining sites for the second consecutive week at Rivershore and Multnomah, the third consecutive week at Wood's Landing and St. Cloud, and the fourth consecutive week at Horsetail. There are still relatively large numbers of juvenile chinook "brights" at all of the sites, as well as a few hatchery origin chinook, coho, and steelhead. As of 5/20, we have sampled 11676 salmonids out of entrapment sites and 175 stranded. This compares with 7,013 salmonids entrapped and 655 stranded at the same time last year. On 5/15, we sampled 53 chinook entrapped (E516) and 3 chinook stranded at the entrance to the E516. The tailwater fluctuation 48 hours preceding this event was a high of 21.0 ft to 18.8 ft. at the time of sampling. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. May 27, 2005 Relative abundance of juvenile chinook "brights" is dropping weekly at all five seining sites. Chum emergence timing was similar to 2004 at all of the sites with the exception of St. Cloud, where this year's peak was on 3/14 compared to 4/6 in 2004. Relative abundance of juvenile chum at Wood's Landing was down this year from a peak count of 716 in 2004 to this year's peak count of 181. This year's peak is similar to previous years with the exception of 2004. Rivershore's relative abundance of juvenile chum was similar to 2004, which is up from 2003's count. Multnomah's relative abundance was up slightly from previous years, as Horsetail and St. Cloud were both down slightly. As of 5/27, we have sampled 11,676 salmonids out of entrapment sites and 175 stranded. This compares with 7,090 salmonids entrapped and 656 stranded at the same time last year. No fish were found stranded or entrapped this past week. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. June 5, 2005 All five seining sites continue to produce juvenile chinook. As of 6/5, we have sampled 12,516 salmonids out of entrapment sites and 175 stranded. This compares with 7,090 salmonids entrapped and 656 stranded at the same time last year. On 6/5, a drop in Bonneville tailwater from a high of 19.6 ft. in the previous 24 hours to 16.4 ft. at the time of sampling produced 425 entrapped salmon. This drop formed an entrapment (E518) that has been a major entrapment in previous years. 345 salmon were pulled from E518 and rest from E516. If an entrapment's waters were replenished by fluctuating river levels on a later date and the entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. June 10, 2005 Relative abundance of juvenile chinook continues to decline at each of the five seining sites. As of 6/10, we have sampled 13,468 salmonids out of entrapment sites and 176 stranded. This compares with 7,078 salmonids entrapped and 656 stranded at the same time last year. A drop in Bonneville tailwater from 17.5 ft. on June 5th to 16.3 ft. at the time of sampling on June 6th created an entrapment (E514) that produced 763 salmon (all chinook). Another 156 chinook were pulled from the same entrapment on June 8th after a drop in Bonneville tailwater to 15.6 ft. from a high of 17.1 in the previous 24 hours. If an entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc. June 16, 2005 We continue to catch juvenile chinook at all five seining sites. As of 6/16, we have sampled 14,158 salmonids out of entrapment sites and 176 stranded. The compares with 7,078 salmonids entrapped and 656 stranded at the same time last year. 690 salmon were found entrapped this past week. All of these fish were found in larger entrapments, two of which have been major entrapments in past years (E514 and E518). The other (E519) is a large circular entrapment in the center of Ives Island. If an entrapment once again contained salmon, it was re-sampled. Subsequent samples are identified by the entrapment's identifying code followed by -2, -3, etc.