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• 81. [Article] Migration Movement

  All†Borders†Are†Temporary "Migration is a phenomenon, not a problem – something that simply is. The right to migrate and to move freely is our human right. When societies restrict or choke off the movements ...

  Citation × Citation Citation Abstract Copy Title: Migration Movement Author: Porte, Robert Year: 2016 All†Borders†Are†Temporary "Migration is a phenomenon, not a problem – something that simply is. The right to migrate and to move freely is our human right. When societies restrict or choke off the movements of their citizens, they end up doing the work of a dam, they generate power and control floods, but in doing so they destroy life and wreck the surrounding space." Justseeds†(excerpt) As the current administration at the time of this writing continues its program of deportation of women and children from the U.S. to their war torn and violent countries of origin, I want not to engage in an art practice that doesn’t consider the sociopolitical climate of our times. Title: Migration Movement Author: Porte, Robert Year: 2016 All†Borders†Are†Temporary "Migration is a phenomenon, not a problem – something that simply is. The right to migrate and to move freely is our human right. When societies restrict or choke off the movements of their citizens, they end up doing the work of a dam, they generate power and control floods, but in doing so they destroy life and wreck the surrounding space." Justseeds†(excerpt) As the current administration at the time of this writing continues its program of deportation of women and children from the U.S. to their war torn and violent countries of origin, I want not to engage in an art practice that doesn’t consider the sociopolitical climate of our times. Close

• 82. [Article] Sri Lankan Migration to the Gulf: Female Breadwinners - Domestic Workers

  Several waves of Sri Lankan migration have taken place since the country gained independence in 1948. Beginning in the mid-1950s, wealthy, educated, English-speaking elites have migrated to Commonwealth ...

  Citation × Citation Citation Abstract Copy Title: Sri Lankan Migration to the Gulf: Female Breadwinners - Domestic Workers Author: Gamburd, Michele Ruth Year: 2010 Several waves of Sri Lankan migration have taken place since the country gained independence in 1948. Beginning in the mid-1950s, wealthy, educated, English-speaking elites have migrated to Commonwealth countries such as Australia and the United Kingdom. In addition, since the upsurge in ethnic hostilities in the early 1980s, Tamil-speaking Hindu migrants have left the country, with many settling in Canada. In contrast with these permanent migrants, since 1976 a growing number of Sri Lankans have become migrant workers. The leading destination for this migrant labor force — the majority of whom are women — has been the Gulf. Title: Sri Lankan Migration to the Gulf: Female Breadwinners - Domestic Workers Author: Gamburd, Michele Ruth Year: 2010 Several waves of Sri Lankan migration have taken place since the country gained independence in 1948. Beginning in the mid-1950s, wealthy, educated, English-speaking elites have migrated to Commonwealth countries such as Australia and the United Kingdom. In addition, since the upsurge in ethnic hostilities in the early 1980s, Tamil-speaking Hindu migrants have left the country, with many settling in Canada. In contrast with these permanent migrants, since 1976 a growing number of Sri Lankans have become migrant workers. The leading destination for this migrant labor force — the majority of whom are women — has been the Gulf. Close

• 83. [Article] Oregon's changing rural population : age, migration and policy response

  Like rural residents in other places, people in rural Oregon have expressed concern about the demographic shifts occurring in their communities. Principally they are concerned about youth leaving and not ...

  Citation × Citation Citation Abstract Copy Title: Oregon's changing rural population : age, migration and policy response Author: Johnson, Samuel L. Like rural residents in other places, people in rural Oregon have expressed concern about the demographic shifts occurring in their communities. Principally they are concerned about youth leaving and not returning. This analysis uses recent Census Bureau data to describe, in detail, the demographic changes occurring in rural Oregon. Particular attention is paid to migration’s role in driving these changes. Interviews of community leaders in rural Oregon reveal how rural Oregon is responding to, and thinking about, these demographic changes. Results indicate that there is no comprehensive public policy in place to address the concern about demographic change. Possible policy strategies to address the demographic changes in rural Oregon are identified. Title: Oregon's changing rural population : age, migration and policy response Author: Johnson, Samuel L. Like rural residents in other places, people in rural Oregon have expressed concern about the demographic shifts occurring in their communities. Principally they are concerned about youth leaving and not returning. This analysis uses recent Census Bureau data to describe, in detail, the demographic changes occurring in rural Oregon. Particular attention is paid to migration’s role in driving these changes. Interviews of community leaders in rural Oregon reveal how rural Oregon is responding to, and thinking about, these demographic changes. Results indicate that there is no comprehensive public policy in place to address the concern about demographic change. Possible policy strategies to address the demographic changes in rural Oregon are identified. Close

• 84. [Article] Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America - Migration Trends Across the 50 Largest U.S. Metros

  In this brief, we present U.S. Census Bureau data to compare recent migration trends for young and college-educated (YCE) individuals for the largest 50 U.S. metro areas in 2012-2014 relative to the pre-recession ...

  Citation × Citation Citation Abstract Copy Title: Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America - Migration Trends Across the 50 Largest U.S. Metros Author: Jurjevich, Jason R., Schrock, Greg, Kang, Jihye Year: 2016 In this brief, we present U.S. Census Bureau data to compare recent migration trends for young and college-educated (YCE) individuals for the largest 50 U.S. metro areas in 2012-2014 relative to the pre-recession (2005-2007) and Great Recession (2008-2010) periods. Title: Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America - Migration Trends Across the 50 Largest U.S. Metros Author: Jurjevich, Jason R., Schrock, Greg, Kang, Jihye Year: 2016 In this brief, we present U.S. Census Bureau data to compare recent migration trends for young and college-educated (YCE) individuals for the largest 50 U.S. metro areas in 2012-2014 relative to the pre-recession (2005-2007) and Great Recession (2008-2010) periods. Close

• 85. [Article] Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America – Migration Trends Across the Largest Western Metros

  In the West, Seattle recorded the largest NMQ gain of YCEs (31.6 percent), followed by San Francisco (28.5 percent), Portland (26.3 percent), and San Jose (26.1 percent). During the Great Recession, as ...

  Citation × Citation Citation Abstract Copy Title: Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America – Migration Trends Across the Largest Western Metros Author: Jurjevich, Jason R., Schrock, Greg, Kang, Jihye Year: 2016 In the West, Seattle recorded the largest NMQ gain of YCEs (31.6 percent), followed by San Francisco (28.5 percent), Portland (26.3 percent), and San Jose (26.1 percent). During the Great Recession, as well as the post-recession recovery period, only four metros outpaced the West’s regional gain in YCE net-migration: 1) Phoenix, 2) Denver, 3) San Francisco, 4) San Jose Title: Talent on the Move: Migration Patterns of the Young and College-Educated in Pre and Post-Recession America – Migration Trends Across the Largest Western Metros Author: Jurjevich, Jason R., Schrock, Greg, Kang, Jihye Year: 2016 In the West, Seattle recorded the largest NMQ gain of YCEs (31.6 percent), followed by San Francisco (28.5 percent), Portland (26.3 percent), and San Jose (26.1 percent). During the Great Recession, as well as the post-recession recovery period, only four metros outpaced the West’s regional gain in YCE net-migration: 1) Phoenix, 2) Denver, 3) San Francisco, 4) San Jose Close

• 86. [Article] Variation in the timing of coho salmon (Oncorhynchus kisutch) migration and spawning relative to river discharge and temperature

  Coho salmon (Oncorhynchus kisutch) migration and spawning are unique components of the salmon life cycle because they require synchrony of behavior with other individuals as well as with acceptable fluvial ...

  Citation × Citation Citation Abstract Copy Title: Variation in the timing of coho salmon (Oncorhynchus kisutch) migration and spawning relative to river discharge and temperature Author: LovellFord, Rachel Coho salmon (Oncorhynchus kisutch) migration and spawning are unique components of the salmon life cycle because they require synchrony of behavior with other individuals as well as with acceptable fluvial conditions. As with other organisms that exhibit group mating behavior, it is likely that environmental cues trigger coho salmon movement to spawning grounds. These cues may also provide usable habitat for migration and spawning. River discharge, temperature, and length of day have long been assumed to be the environmental cues which trigger migration and spawning of coho salmon as coho return within the same season each year to spawn. Hatchery studies have also shown that the timing of reproductive behavior is heritable. If this heritability is determined by the fluvial conditions of the spawning grounds, then a predictable relationship should exist between reproductive behavior and the hydrologic and thermal regimes. Surprisingly, no defensible correlations between discharge thresholds and spawning or migrating activity have been identified for naturally reproducing coho salmon. Thermal, velocity, and depth limitations have been identified for coho salmon, but these values have not been examined in combination or within the context of a hydrologic and thermal regime. This study compares interannual patterns in the timing of coho mid-river migration in the North Umqua (180 km up river from the estuary) and the initiation of spawn timing in the Smith River basins (Oregon) with river discharge and water temperature data to ascertain whether these behaviors are driven by fluvial conditions. Additionally, we used this data to identify the window over which most migration and spawning takes place in our test systems. On the North Umpqua, coho salmon mid-river migration initiated (first 5% of migrants) after summer peak temperatures and following a threshold average daily temperature of 18 C°, but before fall storm events occurred. In most years, approximately 75% of the migrating coho salmon have moved past the Winchester Dam before fall storms initiated and when discharge remained less than the 11 year average for the month of November, more similar to summer than winter flow levels. Additionally, characteristic lengths and numbers of peaks within the distribution of annual migrations were attributable to the generational cohort that the migration belonged to despite the similarity in population size across all years. These patterns in the distribution of generational cohorts suggest an inherited timing response as well as highlight cohorts which may contain diminished sub-populations. The initiation of coho salmon spawning appears limited both by a thermal threshold of 12 C° in all basins, as well as by a minimal discharge threshold, which is unique to each stream. Continued spawning activity occurs as discharge remains elevated from fall levels. It is also notable that there was no statistical difference in the date of the initiation of spawning within each basin in a given year or across years at a given site. Together, these studies highlight the important role that the coho salmon genome plays in reproductive timing as well as the ways that fluvial thresholds limit reproductive behavior in time. Coho have survived because of their genome has been resilient when faced with environmental change. Future work should consider variability in fluvial conditions relative to coho salmon phenotypic plasticity over time. Coho salmon phenotypic plasticity will determine whether the rate of change of the hydrologic and thermal regimes important to coho salmon survival outpaces the coho’s ability to adapt. This study contributed to this future work by establishing baseline relationships between the behavior of a threatened species and measurable environmental thresholds. Title: Variation in the timing of coho salmon (Oncorhynchus kisutch) migration and spawning relative to river discharge and temperature Author: LovellFord, Rachel Coho salmon (Oncorhynchus kisutch) migration and spawning are unique components of the salmon life cycle because they require synchrony of behavior with other individuals as well as with acceptable fluvial conditions. As with other organisms that exhibit group mating behavior, it is likely that environmental cues trigger coho salmon movement to spawning grounds. These cues may also provide usable habitat for migration and spawning. River discharge, temperature, and length of day have long been assumed to be the environmental cues which trigger migration and spawning of coho salmon as coho return within the same season each year to spawn. Hatchery studies have also shown that the timing of reproductive behavior is heritable. If this heritability is determined by the fluvial conditions of the spawning grounds, then a predictable relationship should exist between reproductive behavior and the hydrologic and thermal regimes. Surprisingly, no defensible correlations between discharge thresholds and spawning or migrating activity have been identified for naturally reproducing coho salmon. Thermal, velocity, and depth limitations have been identified for coho salmon, but these values have not been examined in combination or within the context of a hydrologic and thermal regime. This study compares interannual patterns in the timing of coho mid-river migration in the North Umqua (180 km up river from the estuary) and the initiation of spawn timing in the Smith River basins (Oregon) with river discharge and water temperature data to ascertain whether these behaviors are driven by fluvial conditions. Additionally, we used this data to identify the window over which most migration and spawning takes place in our test systems. On the North Umpqua, coho salmon mid-river migration initiated (first 5% of migrants) after summer peak temperatures and following a threshold average daily temperature of 18 C°, but before fall storm events occurred. In most years, approximately 75% of the migrating coho salmon have moved past the Winchester Dam before fall storms initiated and when discharge remained less than the 11 year average for the month of November, more similar to summer than winter flow levels. Additionally, characteristic lengths and numbers of peaks within the distribution of annual migrations were attributable to the generational cohort that the migration belonged to despite the similarity in population size across all years. These patterns in the distribution of generational cohorts suggest an inherited timing response as well as highlight cohorts which may contain diminished sub-populations. The initiation of coho salmon spawning appears limited both by a thermal threshold of 12 C° in all basins, as well as by a minimal discharge threshold, which is unique to each stream. Continued spawning activity occurs as discharge remains elevated from fall levels. It is also notable that there was no statistical difference in the date of the initiation of spawning within each basin in a given year or across years at a given site. Together, these studies highlight the important role that the coho salmon genome plays in reproductive timing as well as the ways that fluvial thresholds limit reproductive behavior in time. Coho have survived because of their genome has been resilient when faced with environmental change. Future work should consider variability in fluvial conditions relative to coho salmon phenotypic plasticity over time. Coho salmon phenotypic plasticity will determine whether the rate of change of the hydrologic and thermal regimes important to coho salmon survival outpaces the coho’s ability to adapt. This study contributed to this future work by establishing baseline relationships between the behavior of a threatened species and measurable environmental thresholds. Close

• 87. [Article] Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA

  The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region ...

  Citation × Citation Citation Abstract Copy Title: Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA Author: Lampman, Ralph Tatsuo The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region in the past 40 to 50 years. Among the many potential causes of this decline, obstruction of migration routes has likely played a substantial role. Within the North Umpqua River basin in southwest Oregon, USA, I focused on the following three research goals: 1) to describe the passage efficiency and migration routes of adult Pacific lamprey at Winchester Dam; 2) to evaluate the seasonal movement patterns of adult Pacific lamprey and their use of holding habitat at Winchester Dam in relation to temperature conditions; and 3) to portray the diversity of upstream migratory behaviors of adult Pacific lamprey and the environmental factors that influence these behaviors. This radio telemetry study was conducted between March 2009 and August 2011 with a combination of fixed stations and manual tracking. Passage efficiency was low in both years (8% and 19%, respectively), and all tagged lamprey that successfully passed the dam used routes other than the fish ladder. Lamprey that migrated early within the run and those with relatively small tags had higher passage rates and traveled further than the other groups of lamprey. Lamprey released above of the dam or those that passed the dam on their own distributed themselves widely in the upstream environment, suggesting that the dam deterred their upstream migration. Using mark-recapture data for the two years, the adult Pacific lamprey population upstream of Winchester Dam was estimated at 960 (95% C.I. [188, 4760]) in 2009 and 556 (95% C.I. [110, 2798]) in 2010, which was considerably lower than historical counts at the dam (between 14,532-46,785 in 1965-1971). Most tagged lamprey that did not pass the dam remained at the base of the dam at the end of the summer migration (63% in 2009 and 67% in 2010). Types of habitat most frequently used by lamprey downstream from the dam included the dam surface (wooden structures with crevices), interface zones between fast and slow water, and highway bridge pilings. The lamprey movement changed considerably between August and September, and the frequency of movements decreased sharply during this period. Tagged lamprey were detected using thermal refuges immediately downstream of the dam that were 0.4 to 2.8 C° colder than the mean river temperature at the dam, and this temperature differential increased as the season progressed. Lamprey may be seeking overwintering habitat associated with hyporheic exchange flows at the dam towards the end of the summer season after their display of heightened activity early in the summer. Ninety-five percent of the overall upstream migration took place during the first spring/summer period, and only small-scale upstream movements were observed during the winter and second spring/summer (4% and 1%, respectively). The rate of upstream migration (median) was the fastest during the initial migration phase and was 1.9 km/day (ranging from 0.3 to 11.0 km/day) for tagged lamprey released above Winchester Dam. During winter, 71% of the lamprey remained in the same location where they initiated holding. Multiple regression analysis indicated that the total upstream distance traveled by individual lamprey was most strongly related to presence/absence of Winchester Dam, relative tag size, and water temperature and photoperiod conditions at release. The presence of Winchester Dam, large relative tag size, and high water temperature / short photoperiod conditions at release significantly reduced upstream migration distance. Title: Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA Author: Lampman, Ralph Tatsuo The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region in the past 40 to 50 years. Among the many potential causes of this decline, obstruction of migration routes has likely played a substantial role. Within the North Umpqua River basin in southwest Oregon, USA, I focused on the following three research goals: 1) to describe the passage efficiency and migration routes of adult Pacific lamprey at Winchester Dam; 2) to evaluate the seasonal movement patterns of adult Pacific lamprey and their use of holding habitat at Winchester Dam in relation to temperature conditions; and 3) to portray the diversity of upstream migratory behaviors of adult Pacific lamprey and the environmental factors that influence these behaviors. This radio telemetry study was conducted between March 2009 and August 2011 with a combination of fixed stations and manual tracking. Passage efficiency was low in both years (8% and 19%, respectively), and all tagged lamprey that successfully passed the dam used routes other than the fish ladder. Lamprey that migrated early within the run and those with relatively small tags had higher passage rates and traveled further than the other groups of lamprey. Lamprey released above of the dam or those that passed the dam on their own distributed themselves widely in the upstream environment, suggesting that the dam deterred their upstream migration. Using mark-recapture data for the two years, the adult Pacific lamprey population upstream of Winchester Dam was estimated at 960 (95% C.I. [188, 4760]) in 2009 and 556 (95% C.I. [110, 2798]) in 2010, which was considerably lower than historical counts at the dam (between 14,532-46,785 in 1965-1971). Most tagged lamprey that did not pass the dam remained at the base of the dam at the end of the summer migration (63% in 2009 and 67% in 2010). Types of habitat most frequently used by lamprey downstream from the dam included the dam surface (wooden structures with crevices), interface zones between fast and slow water, and highway bridge pilings. The lamprey movement changed considerably between August and September, and the frequency of movements decreased sharply during this period. Tagged lamprey were detected using thermal refuges immediately downstream of the dam that were 0.4 to 2.8 C° colder than the mean river temperature at the dam, and this temperature differential increased as the season progressed. Lamprey may be seeking overwintering habitat associated with hyporheic exchange flows at the dam towards the end of the summer season after their display of heightened activity early in the summer. Ninety-five percent of the overall upstream migration took place during the first spring/summer period, and only small-scale upstream movements were observed during the winter and second spring/summer (4% and 1%, respectively). The rate of upstream migration (median) was the fastest during the initial migration phase and was 1.9 km/day (ranging from 0.3 to 11.0 km/day) for tagged lamprey released above Winchester Dam. During winter, 71% of the lamprey remained in the same location where they initiated holding. Multiple regression analysis indicated that the total upstream distance traveled by individual lamprey was most strongly related to presence/absence of Winchester Dam, relative tag size, and water temperature and photoperiod conditions at release. The presence of Winchester Dam, large relative tag size, and high water temperature / short photoperiod conditions at release significantly reduced upstream migration distance. Close

• 88. [Article] Censuses of Black Brant at Yaquina Estuary, Lincoln County, Oregon

  Black Brant (Branta bernicla nigricans) had two different seasonal patterns of occurrence at Yaquina Estuary. At embayment areas with eelgrass (Zostera marina), Brant typically arrived between October ...

  Citation × Citation Citation Abstract Copy Title: Censuses of Black Brant at Yaquina Estuary, Lincoln County, Oregon Author: Bayer, Range D., 1947- Black Brant (Branta bernicla nigricans) had two different seasonal patterns of occurrence at Yaquina Estuary. At embayment areas with eelgrass (Zostera marina), Brant typically arrived between October 22 and November 4, Brant numbers progressively climbed in November, Brant abundance in December-January was relatively constant, and Brant numbers often fluctuated greatly during spring migration in February-April. At a site near the estuary mouth where there was little eelgrass, Brant customarily only appeared during spring migration. About 300-500 Brant wintered at the Yaquina in the 1980's, and usually fewer than 700 Brant were counted during spring migration. Title: Censuses of Black Brant at Yaquina Estuary, Lincoln County, Oregon Author: Bayer, Range D., 1947- Black Brant (Branta bernicla nigricans) had two different seasonal patterns of occurrence at Yaquina Estuary. At embayment areas with eelgrass (Zostera marina), Brant typically arrived between October 22 and November 4, Brant numbers progressively climbed in November, Brant abundance in December-January was relatively constant, and Brant numbers often fluctuated greatly during spring migration in February-April. At a site near the estuary mouth where there was little eelgrass, Brant customarily only appeared during spring migration. About 300-500 Brant wintered at the Yaquina in the 1980's, and usually fewer than 700 Brant were counted during spring migration. Close

• 89. [Article] Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1997

  Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1997 Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1997 migratory year (MY 1997) from 1 September 1996 through 31 August 1997. We determined migration timing and abundance of juvenile spring chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1997 migratory year (MY 1997) from 1 September 1996 through 31 August 1997. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1997 Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1997 migratory year (MY 1997) from 1 September 1996 through 31 August 1997. We determined migration timing and abundance of juvenile spring chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1997 migratory year (MY 1997) from 1 September 1996 through 31 August 1997. ODFW, Eastern Oregon Fish Research (EOFR) Close

• 90. [Article] Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1998

  Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during ...

  Citation × Citation Citation Abstract Copy Title: Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1998 Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1998 migratory year (MY 1998) from 1 Septermber 1997 through 31 August 1998. We determined migration timing and abundance of juvenile spring chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1998 migratory year (MY 1998) from 1 Septermber 1997 through 31 August 1998. ODFW, Eastern Oregon Fish Research (EOFR) Title: Fish Research Project Oregon; Investigations Into The Early Life History Of Naturally Produced Spring Chinook Salmon In The Grande Ronde River Basin - Annual Progress Report 1998 Abstract -- Project determined migration timing and abundance of juvenile spring Chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1998 migratory year (MY 1998) from 1 Septermber 1997 through 31 August 1998. We determined migration timing and abundance of juvenile spring chinook salmon Oncorhynchus tshawytscha using rotary screw traps on four streams in the Grande Ronde River basin during the 1998 migratory year (MY 1998) from 1 Septermber 1997 through 31 August 1998. ODFW, Eastern Oregon Fish Research (EOFR) Close