Search

Search Results

• 1. [Article] Environmental History of the Tillamook Bay Estuary and Watershed

  Abstract -- This report thoroughly documents the history of Tillamook Bay Estuary, from the geomorphic history, Native American landscape, settlement, managed landscape through to modern impacts on the ...

  Citation × Citation Citation Abstract Copy Title: Environmental History of the Tillamook Bay Estuary and Watershed Abstract -- This report thoroughly documents the history of Tillamook Bay Estuary, from the geomorphic history, Native American landscape, settlement, managed landscape through to modern impacts on the landscape. Environmental response is noted. The history of coarse woody debris in the estuary is given, as is the historical mapping and characterization of the 1850s landscape. Title: Environmental History of the Tillamook Bay Estuary and Watershed Abstract -- This report thoroughly documents the history of Tillamook Bay Estuary, from the geomorphic history, Native American landscape, settlement, managed landscape through to modern impacts on the landscape. Environmental response is noted. The history of coarse woody debris in the estuary is given, as is the historical mapping and characterization of the 1850s landscape. Close

• 2. [Article] Lower Snake River Compensation Plan; Oregon Evaluation Studies; Steelhead Life History Characterization; Genetic Characterization; Kelt Reconditioning - Progress Report 2003

  Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex ...

  Citation × Citation Citation Abstract Copy Title: Lower Snake River Compensation Plan; Oregon Evaluation Studies; Steelhead Life History Characterization; Genetic Characterization; Kelt Reconditioning - Progress Report 2003 Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex of life-history strategies ranging from residency in small headwater streams to anadromy involving migrations of hundreds of kilometers. In the Grande Ronde River basin of Northeast Oregon, both resident and anadromous life-history forms coexist, and thus populations found there likely exhibit partial migration. Partial migration may have important consequences for “anadromous” species listed under the Endangered Species Act (ESA). The recent decline of summer steelhead (Oncorhynchus mykiss) stocks in the lower Snake River has prompted their listing under the ESA. Declines in steelhead are potentially due to elevated mortality rates associated with anadromous migrations. If resident and anadromous life-history characteristics result from a phenotypically plastic trait (i.e. a genetic trait that is highly variable due to influences from environmental factors), then elevated mortality associated with the anadromous type may be shifting the populations towards residency. Further, although the anadromous expression of the trait may be declining, the trait would not necessarily be lost. Identification of the plasticity of these traits would then be important for the management of these stocks. We investigated life history traits of O. mykiss with studies in both the hatchery and natural environment. We anticipated that these complimentary approaches would allow us to evaluate the relationship between the two life-history forms. They should further allow us to explore the feasibility of using hatcheries to produce anadromous progeny from resident parents if the number of anadromous life-history forms becomes severely depressed. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Lower Snake River Compensation Plan; Oregon Evaluation Studies; Steelhead Life History Characterization; Genetic Characterization; Kelt Reconditioning - Progress Report 2003 Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex of life-history strategies ranging from residency in small headwater streams to anadromy involving migrations of hundreds of kilometers. In the Grande Ronde River basin of Northeast Oregon, both resident and anadromous life-history forms coexist, and thus populations found there likely exhibit partial migration. Partial migration may have important consequences for “anadromous” species listed under the Endangered Species Act (ESA). The recent decline of summer steelhead (Oncorhynchus mykiss) stocks in the lower Snake River has prompted their listing under the ESA. Declines in steelhead are potentially due to elevated mortality rates associated with anadromous migrations. If resident and anadromous life-history characteristics result from a phenotypically plastic trait (i.e. a genetic trait that is highly variable due to influences from environmental factors), then elevated mortality associated with the anadromous type may be shifting the populations towards residency. Further, although the anadromous expression of the trait may be declining, the trait would not necessarily be lost. Identification of the plasticity of these traits would then be important for the management of these stocks. We investigated life history traits of O. mykiss with studies in both the hatchery and natural environment. We anticipated that these complimentary approaches would allow us to evaluate the relationship between the two life-history forms. They should further allow us to explore the feasibility of using hatcheries to produce anadromous progeny from resident parents if the number of anadromous life-history forms becomes severely depressed. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close

• 3. [Article] Sediment Sources and the History of Accumulation in Tillamook Bay, Oregon

  Abstract -- Tillamook Bay was formed over 9,000 years ago when sea levels rose to inundate the mouths of five rivers. Now hydrodynamics within this large bay - and sedimentation patterns - are very complex. ...

  Citation × Citation Citation Abstract Copy Title: Sediment Sources and the History of Accumulation in Tillamook Bay, Oregon Abstract -- Tillamook Bay was formed over 9,000 years ago when sea levels rose to inundate the mouths of five rivers. Now hydrodynamics within this large bay - and sedimentation patterns - are very complex. This report reviews what is known on the subject and adds results of a recent study. Chapter titles include: surface sediments--a determination of sources and transport paths; surface sediments--geochemical investigations; history of sediment accumulation--a study of core samples; and synthesis--sediment sources, history of sediment accumulation and management implications. Title: Sediment Sources and the History of Accumulation in Tillamook Bay, Oregon Abstract -- Tillamook Bay was formed over 9,000 years ago when sea levels rose to inundate the mouths of five rivers. Now hydrodynamics within this large bay - and sedimentation patterns - are very complex. This report reviews what is known on the subject and adds results of a recent study. Chapter titles include: surface sediments--a determination of sources and transport paths; surface sediments--geochemical investigations; history of sediment accumulation--a study of core samples; and synthesis--sediment sources, history of sediment accumulation and management implications. Close

• 4. [Article] NF - Oregon Lampreys: Natural History Status and Analysis of Management Issues

  Abstract -- Reports on The Natural History of Oregon Lampreys including identification challenges, early life history, courtship and spawning, and local species of lamprey found in Oregon. The report also ...

  Citation × Citation Citation Abstract Copy Title: NF - Oregon Lampreys: Natural History Status and Analysis of Management Issues Abstract -- Reports on The Natural History of Oregon Lampreys including identification challenges, early life history, courtship and spawning, and local species of lamprey found in Oregon. The report also discusses the management issues of Oregon lampreys including Information still needed, harvest issues, habitat issues, and passage issues. Title: NF - Oregon Lampreys: Natural History Status and Analysis of Management Issues Abstract -- Reports on The Natural History of Oregon Lampreys including identification challenges, early life history, courtship and spawning, and local species of lamprey found in Oregon. The report also discusses the management issues of Oregon lampreys including Information still needed, harvest issues, habitat issues, and passage issues. Close

• 5. [Article] Coho Life History in Tide Gated Lowland Coastal Streams, 2016-2018

  Abstract -- Coos Watershed Association’s (CoosWA) coho life history in tide gated lowland coastal streams, a life cycle monitoring (LCM) project, examines the ecology of tidal rearing for coho in the Coos ...

  Citation × Citation Citation Abstract Copy Title: Coho Life History in Tide Gated Lowland Coastal Streams, 2016-2018 Abstract -- Coos Watershed Association’s (CoosWA) coho life history in tide gated lowland coastal streams, a life cycle monitoring (LCM) project, examines the ecology of tidal rearing for coho in the Coos River Basin. This project has adapted to and advanced the recent paradigm shift in juvenile coho life histories, rearing and foraging strategies, growth, survival, migrations, and sub-basin level population productivity in the tidal zone. Temporal and spatial components of coho over-winter rearing strategies, in relation to habitat use and project effectiveness monitoring, is the monitoring focus in the paired study streams of Palouse and Willanch Creeks. Project results further reveal the fundamental mechanisms that promote juvenile coho growth and survival in the estuarine ecotone. In conjunction with prior and current data, results highlight the critical importance of these diverse habitats for recovering viable and resilient Oregon Coast coho populations. Title: Coho Life History in Tide Gated Lowland Coastal Streams, 2016-2018 Abstract -- Coos Watershed Association’s (CoosWA) coho life history in tide gated lowland coastal streams, a life cycle monitoring (LCM) project, examines the ecology of tidal rearing for coho in the Coos River Basin. This project has adapted to and advanced the recent paradigm shift in juvenile coho life histories, rearing and foraging strategies, growth, survival, migrations, and sub-basin level population productivity in the tidal zone. Temporal and spatial components of coho over-winter rearing strategies, in relation to habitat use and project effectiveness monitoring, is the monitoring focus in the paired study streams of Palouse and Willanch Creeks. Project results further reveal the fundamental mechanisms that promote juvenile coho growth and survival in the estuarine ecotone. In conjunction with prior and current data, results highlight the critical importance of these diverse habitats for recovering viable and resilient Oregon Coast coho populations. Close

• 6. [Article] A Watershed Assessment for the Siuslaw Basin

  Abstract -- This assessments includes information on landscape and Siuslaw cultural history, socioeconomic history, hydrology, riparian vegetation and wetlands, channel habitat types, sediment, water quality, ...

  Citation × Citation Citation Abstract Copy Title: A Watershed Assessment for the Siuslaw Basin Abstract -- This assessments includes information on landscape and Siuslaw cultural history, socioeconomic history, hydrology, riparian vegetation and wetlands, channel habitat types, sediment, water quality, aquatic resources, Siuslaw estuary, watershed conditions, ecological capital, and ongoing efforts to restore the aquatic ecosystem. Title: A Watershed Assessment for the Siuslaw Basin Abstract -- This assessments includes information on landscape and Siuslaw cultural history, socioeconomic history, hydrology, riparian vegetation and wetlands, channel habitat types, sediment, water quality, aquatic resources, Siuslaw estuary, watershed conditions, ecological capital, and ongoing efforts to restore the aquatic ecosystem. Close

• 7. [Article] Lower Crooked River Watershed Assessment

  Abstract -- The 2008 Lower Crooked River Watershed Assessment was prepared by the Crooked River Watershed Council. The purpose of the document is to talk about the watershed and its past and current history ...

  Citation × Citation Citation Abstract Copy Title: Lower Crooked River Watershed Assessment Abstract -- The 2008 Lower Crooked River Watershed Assessment was prepared by the Crooked River Watershed Council. The purpose of the document is to talk about the watershed and its past and current history and issues that have taken place in the watershed and how those relate to state and federal regulations. In addition it talks about the diversity of habitat found within the watershed basin and the fish and wildlife that inhabit the area. Following the past and current history the document discusses the assesment and offers some proposed changes to the watershed to ensure higher ecological potential. Title: Lower Crooked River Watershed Assessment Abstract -- The 2008 Lower Crooked River Watershed Assessment was prepared by the Crooked River Watershed Council. The purpose of the document is to talk about the watershed and its past and current history and issues that have taken place in the watershed and how those relate to state and federal regulations. In addition it talks about the diversity of habitat found within the watershed basin and the fish and wildlife that inhabit the area. Following the past and current history the document discusses the assesment and offers some proposed changes to the watershed to ensure higher ecological potential. Close

• 8. [Article] Standard operating procedures for collection and preparation of fish scales and data management

  Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling ...

  Citation × Citation Citation Abstract Copy Title: Standard operating procedures for collection and preparation of fish scales and data management Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling through age estimations and other life history analyses and data dissemination. Title: Standard operating procedures for collection and preparation of fish scales and data management Abstract -- The project maintains high standards of quality in estimation of life history parameters, based on reads of fish scales, including accuracy, precision and efficiency from sample and data handling through age estimations and other life history analyses and data dissemination. Close

• 9. [Article] Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016

  Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. ...

  Citation × Citation Citation Abstract Copy Title: Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016 Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. Data include rotary screw trap catch and associated trap efficiency estimates, length and weight data for spring Chinook salmon and summer steelhead, age data for summer steelhead, and water temperature and discharge data for select streams in the Grande Ronde River Subbasin. Title: Grande Ronde River Subbasin Salmonid Juvenile Life History Study - Migratory Year 2016 Abstract -- Field data from the Grande Ronde River Subbasin (northeast Oregon) for a study designed to document and describe status and life history strategies of spring Chinook salmon and summer steelhead. Data include rotary screw trap catch and associated trap efficiency estimates, length and weight data for spring Chinook salmon and summer steelhead, age data for summer steelhead, and water temperature and discharge data for select streams in the Grande Ronde River Subbasin. Close

• 10. [Article] Performance of Progeny From Steelhead and Rainbow Trout Crosses - Final Report 2009

  Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex ...

  Citation × Citation Citation Abstract Copy Title: Performance of Progeny From Steelhead and Rainbow Trout Crosses - Final Report 2009 Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex of life-history strategies ranging from residency in small headwater streams to anadromy involving migrations of hundreds of kilometers. In the Grande Ronde River basin of northeast Oregon, both resident and anadromous life-history forms coexist, and thus populations found there likely exhibit partial migration. Partial migration may have important consequences for anadromous species listed under the Endangered Species Act (ESA). The recent decline of summer steelhead (Oncorhynchus mykiss) populations in the lower Snake River has prompted their listing under the ESA. Declines in steelhead are potentially due to elevated mortality rates associated with anadromous migrations. If resident and anadromous life-history characteristics result from a phenotypically plastic trait (i.e. a genetic trait that is highly variable due to influences from environmental factors), then elevated mortality associated with the anadromous type may be shifting the populations towards residency. Further, although the anadromous expression of the trait may be declining, the trait would not necessarily be lost. Identification of the plasticity of these traits would then be important for the management of these populations. We investigated life history traits of O. mykiss with studies in both the hatchery and natural environment. We anticipated that these complimentary approaches would allow us to evaluate the relationship between the two life-history forms. They should further allow us to explore the feasibility of using hatcheries to produce anadromous progeny from resident parents if the number of anadromous life-history forms becomes severely depressed. The overall goal of this study was to determine the plasticity of life history forms, specifically the ability of resident adults to produce anadromous progeny. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Title: Performance of Progeny From Steelhead and Rainbow Trout Crosses - Final Report 2009 Abstract -- Many salmonids exhibit partial migration: the phenomenon of populations partitioned into migratory and non-migratory individuals (Jonsson and Jonsson 1993). Oncorhynchus mykiss exhibit a complex of life-history strategies ranging from residency in small headwater streams to anadromy involving migrations of hundreds of kilometers. In the Grande Ronde River basin of northeast Oregon, both resident and anadromous life-history forms coexist, and thus populations found there likely exhibit partial migration. Partial migration may have important consequences for anadromous species listed under the Endangered Species Act (ESA). The recent decline of summer steelhead (Oncorhynchus mykiss) populations in the lower Snake River has prompted their listing under the ESA. Declines in steelhead are potentially due to elevated mortality rates associated with anadromous migrations. If resident and anadromous life-history characteristics result from a phenotypically plastic trait (i.e. a genetic trait that is highly variable due to influences from environmental factors), then elevated mortality associated with the anadromous type may be shifting the populations towards residency. Further, although the anadromous expression of the trait may be declining, the trait would not necessarily be lost. Identification of the plasticity of these traits would then be important for the management of these populations. We investigated life history traits of O. mykiss with studies in both the hatchery and natural environment. We anticipated that these complimentary approaches would allow us to evaluate the relationship between the two life-history forms. They should further allow us to explore the feasibility of using hatcheries to produce anadromous progeny from resident parents if the number of anadromous life-history forms becomes severely depressed. The overall goal of this study was to determine the plasticity of life history forms, specifically the ability of resident adults to produce anadromous progeny. Lower Snake River Compensation Plan (LSRCP) ODFW- Eastern Oregon Fish Research (EOFR) Close