Timothy Counihan (Former Employee)
Science and Products
Filter Total Items: 56
Columbia River Estuary ecosystem classification—Concept and application
This document describes the concept, organization, and application of a hierarchical ecosystem classification that integrates saline and tidal freshwater reaches of estuaries in order to characterize the ecosystems of large flood plain rivers that are strongly influenced by riverine and estuarine hydrology. We illustrate the classification by applying it to the Columbia River estuary (Oregon-Washi
Authors
Charles A. Simenstad, Jennifer L. Burke, Jim E. O'Connor, Charles Cannon, Danelle W. Heatwole, Mary F. Ramirez, Ian R. Waite, Timothy D. Counihan, Krista L. Jones
Guidelines for conducting Smolt survival studies in the Columbia River
For more than a decade, investigators from different research groups in the Pacific Northwest have been using electronic tags to estimate survival of salmonid smolts as they migrate seaward past hydroelectric dams and through impoundments on the Snake and Columbia Rivers. Over the years, they have refined both analytical and field methods associated with such studies. In this collaborative paper,
Authors
Giorgi, Skalski, Pevin, Langeslay, Smith, Timothy D. Counihan, Russell W. Perry, Shane Bickford
Assessing survival for Mid-Columbia River released juvenile salmonids at McNary Dam in 2006 and 2007
n/a
Authors
J.M. Hardiman, C. E. Walker, E.C. Jones, T.D. Counihan, N.S. Adams
Survival and migration behavior of subyearling Chinook salmon at Lower Granite Dam
n/a
Authors
A.L. Puls, T.D. Counihan, C. E. Walker, J.M. Hardiman, I.N. Duran
Survival and migration behavior of juvenile salmonids at McNary Dam, 2007
n/a
Authors
N.S. Adams, T.D. Counihan
Survival and migration behavior of juvenile salmonids at Lower Granite Dam, 2006
We described behavior and estimated passage and survival parameters of juvenile salmonids during spring and summer migration periods at Lower Granite Dam in 2006. During the spring, the study was designed to examine the effects of the Behavioral Guidance Structure (BGS) by using a randomized-block BGS Stored / BGS Deployed treatment design. The summer study was designed to compare passage and surv
Authors
John W. Beeman, Scott D. Fielding, Amy C. Braatz, Tamara S. Wilkerson, Adam C. Pope, Christopher E. Walker, Jill M. Hardiman, Russell W. Perry, Timothy D. Counihan
Passage, survival, and approach patterns of radio-tagged juvenile salmonids at Little Goose Dam, 2006
No abstract available.
Authors
J.W. Beeman, A.C. Braatz, S.D. Fielding, J.M. Hardiman, C. E. Walker, A.C. Pope, T.S. Wilkerson, D.J. Shurtleff, R.W. Perry, T.D. Counihan
Survival estimates of migrant juvenile Salmonids through Bonneville Dam using radio telemetry, 2004
During 2004, the USGS evaluated the survival of radio-tagged yearling and subyearling Chinook salmon and steelhead trout through the ice and trash sluiceway and the minimum gap runner (MGR) turbine unit at Bonneville Dam’s powerhouse 1. Survival was estimated using paired release-recapture models with paired releases made directly into these passage routes and in the tailrace of Bonneville Dam. Fo
Authors
Timothy D. Counihan, Jill Hardiman, Chris Walker, Amy Puls, Glen Holmberg
Survival estimates of migrant juvenile salmonids through Bonneville Dam using radio telemetry, 2005
During 2005, we evaluated the survival of radio-tagged yearling and subyearling Chinook salmon and steelhead trout through the Bonneville Dam spillway, powerhouses 1 and 2, the corner collector and juvenile bypass system (JBS) at powerhouse 2, and through all routes collectively using the route-specific survival model. Radio-tagged fish were released at The Dalles Dam and in the tailrace of Bonnev
Authors
Timothy D. Counihan, Jill M. Hardiman, Chris Walker, Amy Puls, Glen Holmberg
Survival estimates of migrant juvenile salmonids through The Dalles Dam using radio telemetry, 2005
No abstract available
Authors
T. Counihan, A. Puls, C. Walker, G. Holmberg
Aquatic invasive species
Invasive species are plants or animals that are present in an ecosystem beyond their native range. They may have few natural controls in their new environment and proliferate. They can threaten native species and interfere with human activities. The Western Fisheries Research Center (WFRC) has been conducting research to understand how non-native species invade and affect ecosystems, thus aiding m
Authors
R. Rodriguez, T. Counihan, J. Petersen, D. Gadomski, D. Becker
Survival estimates of migrant juvenile salmonids in the Columbia River through John Day Dam using radio-telemetry, 2003
Abstract not available
Authors
T.D. Counihan, G.S. Holmberg, C. E. Walker, J.M. Hardiman
Science and Products
Filter Total Items: 56
Columbia River Estuary ecosystem classification—Concept and application
This document describes the concept, organization, and application of a hierarchical ecosystem classification that integrates saline and tidal freshwater reaches of estuaries in order to characterize the ecosystems of large flood plain rivers that are strongly influenced by riverine and estuarine hydrology. We illustrate the classification by applying it to the Columbia River estuary (Oregon-Washi
Authors
Charles A. Simenstad, Jennifer L. Burke, Jim E. O'Connor, Charles Cannon, Danelle W. Heatwole, Mary F. Ramirez, Ian R. Waite, Timothy D. Counihan, Krista L. Jones
Guidelines for conducting Smolt survival studies in the Columbia River
For more than a decade, investigators from different research groups in the Pacific Northwest have been using electronic tags to estimate survival of salmonid smolts as they migrate seaward past hydroelectric dams and through impoundments on the Snake and Columbia Rivers. Over the years, they have refined both analytical and field methods associated with such studies. In this collaborative paper,
Authors
Giorgi, Skalski, Pevin, Langeslay, Smith, Timothy D. Counihan, Russell W. Perry, Shane Bickford
Assessing survival for Mid-Columbia River released juvenile salmonids at McNary Dam in 2006 and 2007
n/a
Authors
J.M. Hardiman, C. E. Walker, E.C. Jones, T.D. Counihan, N.S. Adams
Survival and migration behavior of subyearling Chinook salmon at Lower Granite Dam
n/a
Authors
A.L. Puls, T.D. Counihan, C. E. Walker, J.M. Hardiman, I.N. Duran
Survival and migration behavior of juvenile salmonids at McNary Dam, 2007
n/a
Authors
N.S. Adams, T.D. Counihan
Survival and migration behavior of juvenile salmonids at Lower Granite Dam, 2006
We described behavior and estimated passage and survival parameters of juvenile salmonids during spring and summer migration periods at Lower Granite Dam in 2006. During the spring, the study was designed to examine the effects of the Behavioral Guidance Structure (BGS) by using a randomized-block BGS Stored / BGS Deployed treatment design. The summer study was designed to compare passage and surv
Authors
John W. Beeman, Scott D. Fielding, Amy C. Braatz, Tamara S. Wilkerson, Adam C. Pope, Christopher E. Walker, Jill M. Hardiman, Russell W. Perry, Timothy D. Counihan
Passage, survival, and approach patterns of radio-tagged juvenile salmonids at Little Goose Dam, 2006
No abstract available.
Authors
J.W. Beeman, A.C. Braatz, S.D. Fielding, J.M. Hardiman, C. E. Walker, A.C. Pope, T.S. Wilkerson, D.J. Shurtleff, R.W. Perry, T.D. Counihan
Survival estimates of migrant juvenile Salmonids through Bonneville Dam using radio telemetry, 2004
During 2004, the USGS evaluated the survival of radio-tagged yearling and subyearling Chinook salmon and steelhead trout through the ice and trash sluiceway and the minimum gap runner (MGR) turbine unit at Bonneville Dam’s powerhouse 1. Survival was estimated using paired release-recapture models with paired releases made directly into these passage routes and in the tailrace of Bonneville Dam. Fo
Authors
Timothy D. Counihan, Jill Hardiman, Chris Walker, Amy Puls, Glen Holmberg
Survival estimates of migrant juvenile salmonids through Bonneville Dam using radio telemetry, 2005
During 2005, we evaluated the survival of radio-tagged yearling and subyearling Chinook salmon and steelhead trout through the Bonneville Dam spillway, powerhouses 1 and 2, the corner collector and juvenile bypass system (JBS) at powerhouse 2, and through all routes collectively using the route-specific survival model. Radio-tagged fish were released at The Dalles Dam and in the tailrace of Bonnev
Authors
Timothy D. Counihan, Jill M. Hardiman, Chris Walker, Amy Puls, Glen Holmberg
Survival estimates of migrant juvenile salmonids through The Dalles Dam using radio telemetry, 2005
No abstract available
Authors
T. Counihan, A. Puls, C. Walker, G. Holmberg
Aquatic invasive species
Invasive species are plants or animals that are present in an ecosystem beyond their native range. They may have few natural controls in their new environment and proliferate. They can threaten native species and interfere with human activities. The Western Fisheries Research Center (WFRC) has been conducting research to understand how non-native species invade and affect ecosystems, thus aiding m
Authors
R. Rodriguez, T. Counihan, J. Petersen, D. Gadomski, D. Becker
Survival estimates of migrant juvenile salmonids in the Columbia River through John Day Dam using radio-telemetry, 2003
Abstract not available
Authors
T.D. Counihan, G.S. Holmberg, C. E. Walker, J.M. Hardiman