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• 1. [Article] Using Spatial Resampling to Assess Redd Count Survey Length Requirements for Pacific Lamprey

  To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The article is copyrighted by the American Fisheries ...

  Citation × Citation Citation Abstract Copy Title: Using Spatial Resampling to Assess Redd Count Survey Length Requirements for Pacific Lamprey Author: Schultz, L. D., Colvin, M. E., Mayfield, M. P., Wyss, L. A., Schreck, C. B. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The article is copyrighted by the American Fisheries Society and published by Taylor & Francis. It can be found at: http://www.tandfonline.com/loi/ujfm20#.VJnE_s_AAA. Title: Using Spatial Resampling to Assess Redd Count Survey Length Requirements for Pacific Lamprey Author: Schultz, L. D., Colvin, M. E., Mayfield, M. P., Wyss, L. A., Schreck, C. B. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The article is copyrighted by the American Fisheries Society and published by Taylor & Francis. It can be found at: http://www.tandfonline.com/loi/ujfm20#.VJnE_s_AAA. Close

• 2. [Article] Analysis of best management practices in the Columbia River Channel Improvement Project (CRCIP)

  The Columbia River Channel Improvement Project (CRCIP) was constructed along 166.6 km (103.5 miles) of Columbia River (from River Mile 3 to 106.5), which was from Interstate 5 Bridge (between Portland ...

  Citation × Citation Citation Abstract Copy Title: Analysis of best management practices in the Columbia River Channel Improvement Project (CRCIP) Author: Ridwan, Denni The Columbia River Channel Improvement Project (CRCIP) was constructed along 166.6 km (103.5 miles) of Columbia River (from River Mile 3 to 106.5), which was from Interstate 5 Bridge (between Portland and Vancouver) to the river mouth, before emptying into the Pacific Ocean. It deepened the river by 0.9 m (3-feet), from 12.2 m to 13.1 m (40-foot to 43-foot) depth, in order to provide enough depth for the need of current transportation. The project obtained approval from US Congress after presenting the Benefit-Cost Ratio (BCR) of 1.66. In addition, it also anticipated continued sedimentation, enabling full capacity loads in cargo transportation, as well as providing a positive balance of environmental benefits. Significant discrepancies in terms of volume, cost and duration in the CRCIP were found after the project completion in fall 2010. With such lingering open-ended questions, this research seeks to clarify these questions by looking into the activities during the project implementation. Data were collected from the U.S. Army Corps of Engineers (USACE) Feasibility Study and Environmental Impact Statement (FSEIS) in 2003 as well as Final Report Adaptive Environmental Management (AEM) in 2011. The data were then contrasted with those from opposing parties, such as Northwest Environmental Advocates (NWEA), declaration of Ernie Niemi (an economist), and related news. Data analysis was made by evaluating the methods applied in the dredging work (bathymetric survey), cost breakdown, benefit-cost analysis, as well as time schedule. Post-implementation data/information obtained from the USACE Portland District Office were used as additional input in discussing different viewpoints in the scope of research. Result showed additional dredging volume of about 32%, which was caused by the extra work of maintenance dredging. This compared to a 7% difference in calculation due to different methods between the dredging of material and its disposal. The difference in the project cost was referred to the point-in-time estimate between year of project initiation and year of its completion. The benefit-cost ratio was verified, despite different opinions from opposing parties about the factors to be included in the project’s benefits and costs. Extended project duration was analyzed by assessing the availability of funding for every year of implementation. Most of the funding came from US Congress, thus the amount of its annual disbursement significantly affected the progress of project implementation. It is recommended to conduct continuing research of the CRCIP with regards to environmental issues. The maintenance phase, which will end this year, could provide some information about the extent of environmental benefits as claimed by the project. Title: Analysis of best management practices in the Columbia River Channel Improvement Project (CRCIP) Author: Ridwan, Denni The Columbia River Channel Improvement Project (CRCIP) was constructed along 166.6 km (103.5 miles) of Columbia River (from River Mile 3 to 106.5), which was from Interstate 5 Bridge (between Portland and Vancouver) to the river mouth, before emptying into the Pacific Ocean. It deepened the river by 0.9 m (3-feet), from 12.2 m to 13.1 m (40-foot to 43-foot) depth, in order to provide enough depth for the need of current transportation. The project obtained approval from US Congress after presenting the Benefit-Cost Ratio (BCR) of 1.66. In addition, it also anticipated continued sedimentation, enabling full capacity loads in cargo transportation, as well as providing a positive balance of environmental benefits. Significant discrepancies in terms of volume, cost and duration in the CRCIP were found after the project completion in fall 2010. With such lingering open-ended questions, this research seeks to clarify these questions by looking into the activities during the project implementation. Data were collected from the U.S. Army Corps of Engineers (USACE) Feasibility Study and Environmental Impact Statement (FSEIS) in 2003 as well as Final Report Adaptive Environmental Management (AEM) in 2011. The data were then contrasted with those from opposing parties, such as Northwest Environmental Advocates (NWEA), declaration of Ernie Niemi (an economist), and related news. Data analysis was made by evaluating the methods applied in the dredging work (bathymetric survey), cost breakdown, benefit-cost analysis, as well as time schedule. Post-implementation data/information obtained from the USACE Portland District Office were used as additional input in discussing different viewpoints in the scope of research. Result showed additional dredging volume of about 32%, which was caused by the extra work of maintenance dredging. This compared to a 7% difference in calculation due to different methods between the dredging of material and its disposal. The difference in the project cost was referred to the point-in-time estimate between year of project initiation and year of its completion. The benefit-cost ratio was verified, despite different opinions from opposing parties about the factors to be included in the project’s benefits and costs. Extended project duration was analyzed by assessing the availability of funding for every year of implementation. Most of the funding came from US Congress, thus the amount of its annual disbursement significantly affected the progress of project implementation. It is recommended to conduct continuing research of the CRCIP with regards to environmental issues. The maintenance phase, which will end this year, could provide some information about the extent of environmental benefits as claimed by the project. Close

• 3. [Article] Columbia Basin Heritage Fish Consumption Rates

  This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10745

  Citation × Citation Citation Abstract Copy Title: Columbia Basin Heritage Fish Consumption Rates Author: Harper, Barbara L., Walker, Deward E., Jr. This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10745 Title: Columbia Basin Heritage Fish Consumption Rates Author: Harper, Barbara L., Walker, Deward E., Jr. This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/10745 Close

• 4. [Article] Life histories of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River estuary as inferred from scale and otolith microchemistry

  Despite evidence that juvenile Chinook salmon (Oncorhynchus tshawytscha) utilize North Pacific estuaries for growth and salinity acclimation, research in the Columbia River estuary has lead to opposing ...

  Citation × Citation Citation Abstract Copy Title: Life histories of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River estuary as inferred from scale and otolith microchemistry Author: Campbell, Lance A. Despite evidence that juvenile Chinook salmon (Oncorhynchus tshawytscha) utilize North Pacific estuaries for growth and salinity acclimation, research in the Columbia River estuary has lead to opposing hypotheses about the estuary’s importance as a salmon rearing environment. Many contemporary tagging studies indicate that salmon residency within the estuary is short (< 1 week) and that mortality of estuarine migrants is a significant impediment to recovery of depressed salmon stocks. On the other hand, life history interpretations from fish scales collected early in the twentieth century suggest that juvenile Chinook salmon reared extensively in the estuary, leading some to hypothesize that life history variation has been constrained by anthropogenic changes in the Columbia River basin. To test these hypotheses we first validated previous methods of life history interpretation by comparing the results of otolith chemistry, scale chemistry, and scale morphology from juvenile salmon collected during monthly beach seine surveys in 2003. Although scale and otolith chemistry were strongly correlated, and scale chemistry was an accurate indicator of salt-water entry, scale morphometric characteristics did not coincide consistently with the time of salmon entry into brackish water. We measured Strontium 86 and Calcium 43 in salmon otoliths collected in the lower Columbia River estuary in 2003-05 to quantify the period of salt-water residency of juvenile salmon and to back-calculate their size at salt-water entry. The estimated salt-water residency of juvenile Chinook ranged from 0-176 days with a mean residence time of 54, 67 and 30 days in 2003, 2004 and 2005, respectively. Chinook salmon that resided in salt water for more than 30 days comprised 55, 51 and 30% of the total estuary beach seine collections during each of these years. Forty to fifty percent of Chinook salmon had entered the saline portion of the estuary at a fork length < 60 mm. Furthermore we found a negative relationship between the size and time of entry with residency, where smaller earlier migrants on average resided for longer periods then larger late migrants. Peak migration times occurred in May, and 90% of the outmigration was completed by August 30 in all years. This pattern is substantially truncated relative to the results of a 1914-1916 salmon life-history survey, which showed that the historical outmigration period lasted well into the fall and was characterized by late pulses of new recruits into the lower estuary. Nonetheless, recent otolith results indicate that subyearling Chinook salmon use the saline portion of the estuary in a high proportion and for extended periods of time in contrast to short residency times reported by contemporary tagging and marking studies. Title: Life histories of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River estuary as inferred from scale and otolith microchemistry Author: Campbell, Lance A. Despite evidence that juvenile Chinook salmon (Oncorhynchus tshawytscha) utilize North Pacific estuaries for growth and salinity acclimation, research in the Columbia River estuary has lead to opposing hypotheses about the estuary’s importance as a salmon rearing environment. Many contemporary tagging studies indicate that salmon residency within the estuary is short (< 1 week) and that mortality of estuarine migrants is a significant impediment to recovery of depressed salmon stocks. On the other hand, life history interpretations from fish scales collected early in the twentieth century suggest that juvenile Chinook salmon reared extensively in the estuary, leading some to hypothesize that life history variation has been constrained by anthropogenic changes in the Columbia River basin. To test these hypotheses we first validated previous methods of life history interpretation by comparing the results of otolith chemistry, scale chemistry, and scale morphology from juvenile salmon collected during monthly beach seine surveys in 2003. Although scale and otolith chemistry were strongly correlated, and scale chemistry was an accurate indicator of salt-water entry, scale morphometric characteristics did not coincide consistently with the time of salmon entry into brackish water. We measured Strontium 86 and Calcium 43 in salmon otoliths collected in the lower Columbia River estuary in 2003-05 to quantify the period of salt-water residency of juvenile salmon and to back-calculate their size at salt-water entry. The estimated salt-water residency of juvenile Chinook ranged from 0-176 days with a mean residence time of 54, 67 and 30 days in 2003, 2004 and 2005, respectively. Chinook salmon that resided in salt water for more than 30 days comprised 55, 51 and 30% of the total estuary beach seine collections during each of these years. Forty to fifty percent of Chinook salmon had entered the saline portion of the estuary at a fork length < 60 mm. Furthermore we found a negative relationship between the size and time of entry with residency, where smaller earlier migrants on average resided for longer periods then larger late migrants. Peak migration times occurred in May, and 90% of the outmigration was completed by August 30 in all years. This pattern is substantially truncated relative to the results of a 1914-1916 salmon life-history survey, which showed that the historical outmigration period lasted well into the fall and was characterized by late pulses of new recruits into the lower estuary. Nonetheless, recent otolith results indicate that subyearling Chinook salmon use the saline portion of the estuary in a high proportion and for extended periods of time in contrast to short residency times reported by contemporary tagging and marking studies. Close