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• 1. [Article] The distribution and aggregation of Chinook salmon stocks on the Oregon Shelf as indicated by the commercial catch and genetics

  Project CROOS, Collaborative Research on Oregon Ocean Salmon, is a unique partnership of scientists and commercial fishermen that combines catch location data with stock assignments obtained from genetic ...

  Citation × Citation Citation Abstract Copy Title: The distribution and aggregation of Chinook salmon stocks on the Oregon Shelf as indicated by the commercial catch and genetics Author: Ireland, Robert (Robert Carey) Project CROOS, Collaborative Research on Oregon Ocean Salmon, is a unique partnership of scientists and commercial fishermen that combines catch location data with stock assignments obtained from genetic micro-satellite analysis to investigate the distribution of Oregon Chinook across multiple spatial scales. Using catch data collected by collaborating Oregon troll fishermen, we investigated the distribution of individual populations of Chinook salmon along the nearshore regions of the Oregon Coast. The study focused on two distinct spatial scales: 1) the coast-wide, latitudinal distribution of the 13 most abundant stocks that contributed to the Oregon catch in 2007, and 2) stock-based patterns of Chinook aggregation on spatial scales as low as tens to hundreds of meters. The description of spatial distribution was performed over time periods as short as two days and in season-long summaries. Based on 2007 catch data, we report three separate patterns in the coastal distribution of Oregon-caught Chinook. Stocks from the Sacramento River, Mid-Oregon Coast and Upper Columbia basin were distributed coast-wide in the Oregon catch. Chinook salmon that originated from northern California and southern Oregon were found to be more abundant south of 44° North – the approximate latitude of the coastal town of Florence, Oregon. Stocks from the north Oregon coast and the lower Columbia basin were primarily taken north of 44° North. We describe in-season and annual changes in the relative contribution of discrete stocks and in the age-structure of these stocks. Using distance-based metrics compared to random permutations, we found evidence from the ocean catch that Chinook salmon were sometimes closely proximate to river cohorts at sea. However, these discreet stocks were generally intermingled with other stocks in mixed-stock aggregations. Title: The distribution and aggregation of Chinook salmon stocks on the Oregon Shelf as indicated by the commercial catch and genetics Author: Ireland, Robert (Robert Carey) Project CROOS, Collaborative Research on Oregon Ocean Salmon, is a unique partnership of scientists and commercial fishermen that combines catch location data with stock assignments obtained from genetic micro-satellite analysis to investigate the distribution of Oregon Chinook across multiple spatial scales. Using catch data collected by collaborating Oregon troll fishermen, we investigated the distribution of individual populations of Chinook salmon along the nearshore regions of the Oregon Coast. The study focused on two distinct spatial scales: 1) the coast-wide, latitudinal distribution of the 13 most abundant stocks that contributed to the Oregon catch in 2007, and 2) stock-based patterns of Chinook aggregation on spatial scales as low as tens to hundreds of meters. The description of spatial distribution was performed over time periods as short as two days and in season-long summaries. Based on 2007 catch data, we report three separate patterns in the coastal distribution of Oregon-caught Chinook. Stocks from the Sacramento River, Mid-Oregon Coast and Upper Columbia basin were distributed coast-wide in the Oregon catch. Chinook salmon that originated from northern California and southern Oregon were found to be more abundant south of 44° North – the approximate latitude of the coastal town of Florence, Oregon. Stocks from the north Oregon coast and the lower Columbia basin were primarily taken north of 44° North. We describe in-season and annual changes in the relative contribution of discrete stocks and in the age-structure of these stocks. Using distance-based metrics compared to random permutations, we found evidence from the ocean catch that Chinook salmon were sometimes closely proximate to river cohorts at sea. However, these discreet stocks were generally intermingled with other stocks in mixed-stock aggregations. Close

• 2. [Article] The Oregon plan for salmon and watersheds: a perspective.

  The Oregon Plan is a state-led strategy for restoring and conserving native salmonids and the watersheds within which they spend all or parts of their lives. It evolved from work that began in the 1980s ...

  Citation × Citation Citation Abstract Copy Title: The Oregon plan for salmon and watersheds: a perspective. Author: Institute for Natural Resources, Salwasser, Hal, Achterman, Gail, Arha, Kaush The Oregon Plan is a state-led strategy for restoring and conserving native salmonids and the watersheds within which they spend all or parts of their lives. It evolved from work that began in the 1980s on watershed health and salmon conservation and was propelled into high gear by proposed and eventual listings of native salmonids in Oregon under the federal Endangered Species Act during the mid-1990s. The Plan has expanded in scope and activities since then, and now encompasses all native salmonids and all watersheds in the state. It has spawned new commitments and investments from private landowners and generated significant improvements in state agency coordination related to salmonids and watershed health. The accomplishments of the Oregon Plan create an unparalleled foundation for state-led species conservation. The work remaining creates abundant opportunity for new leaders to add their embellishments to the fine work of others to date. Title: The Oregon plan for salmon and watersheds: a perspective. Author: Institute for Natural Resources, Salwasser, Hal, Achterman, Gail, Arha, Kaush The Oregon Plan is a state-led strategy for restoring and conserving native salmonids and the watersheds within which they spend all or parts of their lives. It evolved from work that began in the 1980s on watershed health and salmon conservation and was propelled into high gear by proposed and eventual listings of native salmonids in Oregon under the federal Endangered Species Act during the mid-1990s. The Plan has expanded in scope and activities since then, and now encompasses all native salmonids and all watersheds in the state. It has spawned new commitments and investments from private landowners and generated significant improvements in state agency coordination related to salmonids and watershed health. The accomplishments of the Oregon Plan create an unparalleled foundation for state-led species conservation. The work remaining creates abundant opportunity for new leaders to add their embellishments to the fine work of others to date. Close

• 3. [Article] Marine bird aggregations associated with the tidally-driven plume and plume fronts of the Columbia River

  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 published article is copyrighted by Elsevier ...

  Citation × Citation Citation Abstract Copy Title: Marine bird aggregations associated with the tidally-driven plume and plume fronts of the Columbia River Author: Guy, Troy J., Phillips, Elizabeth M., Zamon, Jeannette E. 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 published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/deep-sea-research-part-ii-topical-studies-in-oceanography. Title: Marine bird aggregations associated with the tidally-driven plume and plume fronts of the Columbia River Author: Guy, Troy J., Phillips, Elizabeth M., Zamon, Jeannette E. 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 published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/deep-sea-research-part-ii-topical-studies-in-oceanography. Close

• 4. [Article] Analytical determination of copper speciation in Oregon highway runoff

  Low concentrations of dissolved copper have been shown to adversely affect the olfactory system of endangered salmonids, impairing their ability to avoid predators and likely increasing predation. It is ...

  Citation × Citation Citation Abstract Copy Title: Analytical determination of copper speciation in Oregon highway runoff Author: Sprick, Matthew S. Low concentrations of dissolved copper have been shown to adversely affect the olfactory system of endangered salmonids, impairing their ability to avoid predators and likely increasing predation. It is believed that only the free ionic (Cu2+ free) and weakly complexed forms are bioavailable to organisms; these forms typically account for a small fraction of the total dissolved copper. To determine the threat of copper to salmonids, the speciation of copper in aqueous environments is essential. Copper speciation has been examined in freshwater, seawater, estuaries, and rainwater. However, no such studies have focused on stormwater, a major source of dissolved copper in natural water bodies. To bridge this gap in knowledge, competitive ligand exchange – adsorptive cathodic stripping voltammetry (CLEACSV) techniques developed for seawater were adapted to stormwater. CLE-ACSV is unique among speciation techniques in that it allows the characterization of the ligands in the system as well as free copper concentrations. Major alterations of seawater CLE-ACSV techniques include the shift to a lower pH (6.80) and the addition of an electrolyte to increase solution ionic strength to 0.05M. The results of this research show that free copper concentrations at the monitored sites ranges from 10−13.49 to 10−6.74 M. Additionally, free copper concentrations are best correlated with dissolved copper and hardness levels. Ligand concentrations correlate with dissolved organic carbon (DOC) measurements and (along with copper-ligand stability constants) vary widely within and between sites. Finally, modeled Cu2+ free concentrations overestimate analytically determined concentrations. Title: Analytical determination of copper speciation in Oregon highway runoff Author: Sprick, Matthew S. Low concentrations of dissolved copper have been shown to adversely affect the olfactory system of endangered salmonids, impairing their ability to avoid predators and likely increasing predation. It is believed that only the free ionic (Cu2+ free) and weakly complexed forms are bioavailable to organisms; these forms typically account for a small fraction of the total dissolved copper. To determine the threat of copper to salmonids, the speciation of copper in aqueous environments is essential. Copper speciation has been examined in freshwater, seawater, estuaries, and rainwater. However, no such studies have focused on stormwater, a major source of dissolved copper in natural water bodies. To bridge this gap in knowledge, competitive ligand exchange – adsorptive cathodic stripping voltammetry (CLEACSV) techniques developed for seawater were adapted to stormwater. CLE-ACSV is unique among speciation techniques in that it allows the characterization of the ligands in the system as well as free copper concentrations. Major alterations of seawater CLE-ACSV techniques include the shift to a lower pH (6.80) and the addition of an electrolyte to increase solution ionic strength to 0.05M. The results of this research show that free copper concentrations at the monitored sites ranges from 10−13.49 to 10−6.74 M. Additionally, free copper concentrations are best correlated with dissolved copper and hardness levels. Ligand concentrations correlate with dissolved organic carbon (DOC) measurements and (along with copper-ligand stability constants) vary widely within and between sites. Finally, modeled Cu2+ free concentrations overestimate analytically determined concentrations. Close