Search

Search Results

• 3561. [Article] Coastal Steelhead Spawning Survey Procedures Manual 2004

  Abstract -- In 1998 steelhead spawning surveys were implemented in selected coastal basins to test the feasibility of using steelhead redd counts to estimate the abundance of adult steelhead. In order ...

  Citation × Citation Citation Abstract Copy Title: Coastal Steelhead Spawning Survey Procedures Manual 2004 Abstract -- In 1998 steelhead spawning surveys were implemented in selected coastal basins to test the feasibility of using steelhead redd counts to estimate the abundance of adult steelhead. In order to test survey reliability, areas above adult counting stations were comprehensively surveyed and redd counts were compared with adult passage numbers. In 1999 we continued the evaluation of the relationship between survey estimates and adult passage above calibration sites. In addition, exploratory surveys were conducted to develop a list of potential annual survey sites with a broad geographic distribution for indexing steelhead abundance coast-wide. See project annual reports for detail of 1998 and 1999 sampling. From 2000 to 2002, research was confined to the Smith River Basin and calibration surveys were limited to Mill and Fishhawk Creeks. This research allowed comparison of population estimates derived from mark-recapture to redd counts in randomly chosen survey sites. Results obtained from this study have shown redd counts to be a consistent measure of steelhead spawner abundance. A survey program was initiated in 2003 to monitor Oregon coastal steelhead utilizing the results of this study. Title: Coastal Steelhead Spawning Survey Procedures Manual 2004 Abstract -- In 1998 steelhead spawning surveys were implemented in selected coastal basins to test the feasibility of using steelhead redd counts to estimate the abundance of adult steelhead. In order to test survey reliability, areas above adult counting stations were comprehensively surveyed and redd counts were compared with adult passage numbers. In 1999 we continued the evaluation of the relationship between survey estimates and adult passage above calibration sites. In addition, exploratory surveys were conducted to develop a list of potential annual survey sites with a broad geographic distribution for indexing steelhead abundance coast-wide. See project annual reports for detail of 1998 and 1999 sampling. From 2000 to 2002, research was confined to the Smith River Basin and calibration surveys were limited to Mill and Fishhawk Creeks. This research allowed comparison of population estimates derived from mark-recapture to redd counts in randomly chosen survey sites. Results obtained from this study have shown redd counts to be a consistent measure of steelhead spawner abundance. A survey program was initiated in 2003 to monitor Oregon coastal steelhead utilizing the results of this study. Close

• 3562. [Article] DRAFT Lower Columbia River Chinook in Oregon Freshwater Fisheries of the Lower Columbia River Mainstem and Tributaries Between the Pacific Ocean and Hood River, 2001

  Abstract -- This Fisheries Management and Evaluation Plan (FMEP) specifies the future management of recreational and commercial fisheries potentially affecting listed lower Columbia River chinook salmon. ...

  Citation × Citation Citation Abstract Copy Title: DRAFT Lower Columbia River Chinook in Oregon Freshwater Fisheries of the Lower Columbia River Mainstem and Tributaries Between the Pacific Ocean and Hood River, 2001 Abstract -- This Fisheries Management and Evaluation Plan (FMEP) specifies the future management of recreational and commercial fisheries potentially affecting listed lower Columbia River chinook salmon. Five natural chinook populations are identified for this listed species. Fisheries in Oregon tributaries of the lower Columbia River will be managed to harvest hatchery-origin salmon and steelhead and harvestable surpluses of other species in a manner that does not jeopardize the survival and recovery of listed spring and fall chinook. Only chinook salmon that are adipose finclipped will be allowed to be retained beginning in 2002 in the Willamette, Clackamas, and Sandy basins. All nonfinclipped, wild fish will be required to be released. This selective fishery regime is expected to result in reduction of nearly 90% in average tributary fishery mortalities for Sandy spring chinook and Sandy and Clackamas fall chinook. Tributary fishery impacts on lower Columbia River chinook in other Oregon tributaries of the lower Columbia are minor or insignificant. Ocean and mainstem Columbia fishery impacts are addressed by other ESA processes although impacts of those fisheries are considered in this FMEP through a cumulative impact assessment. A comprehensive monitoring and evaluation plan will assess the catch, the abundance of hatchery and wild fish, and angler compliance. This information will be used annually to assess whether impacts to listed fish are as expected. Review of the FMEP will occur in 2004 (after 3 years of implementation) and at 5-year intervals thereafter to evaluate whether the objectives of the FMEP are being accomplished. Title: DRAFT Lower Columbia River Chinook in Oregon Freshwater Fisheries of the Lower Columbia River Mainstem and Tributaries Between the Pacific Ocean and Hood River, 2001 Abstract -- This Fisheries Management and Evaluation Plan (FMEP) specifies the future management of recreational and commercial fisheries potentially affecting listed lower Columbia River chinook salmon. Five natural chinook populations are identified for this listed species. Fisheries in Oregon tributaries of the lower Columbia River will be managed to harvest hatchery-origin salmon and steelhead and harvestable surpluses of other species in a manner that does not jeopardize the survival and recovery of listed spring and fall chinook. Only chinook salmon that are adipose finclipped will be allowed to be retained beginning in 2002 in the Willamette, Clackamas, and Sandy basins. All nonfinclipped, wild fish will be required to be released. This selective fishery regime is expected to result in reduction of nearly 90% in average tributary fishery mortalities for Sandy spring chinook and Sandy and Clackamas fall chinook. Tributary fishery impacts on lower Columbia River chinook in other Oregon tributaries of the lower Columbia are minor or insignificant. Ocean and mainstem Columbia fishery impacts are addressed by other ESA processes although impacts of those fisheries are considered in this FMEP through a cumulative impact assessment. A comprehensive monitoring and evaluation plan will assess the catch, the abundance of hatchery and wild fish, and angler compliance. This information will be used annually to assess whether impacts to listed fish are as expected. Review of the FMEP will occur in 2004 (after 3 years of implementation) and at 5-year intervals thereafter to evaluate whether the objectives of the FMEP are being accomplished. Close

• 3563. [Article] A Proposal for an Integrated Research Monitoring Program for Oregon Coastal Chinook Populations

  Abstract -- Among the many chinook salmon populations contributing to large, mixed stock ocean net, troll, and recreational fisheries managed by the Pacific Salmon Commission (PSC) there is a good deal ...

  Citation × Citation Citation Abstract Copy Title: A Proposal for an Integrated Research Monitoring Program for Oregon Coastal Chinook Populations Abstract -- Among the many chinook salmon populations contributing to large, mixed stock ocean net, troll, and recreational fisheries managed by the Pacific Salmon Commission (PSC) there is a good deal of diversity with respect to productivity, life history characteristics, and ocean distribution. During the years immediately following the adoption of the original 1985 Pacific Salmon Treaty (PST), lack of adequate data prevented the PSC from managing effectively for these differences. Instead, chinook management outlined in Annex IV of the original treaty was based upon long term population trends for very large aggregates of stocks. Although harvest ceilings were established as part of a PST recovery plan for over-exploited stocks, they were based on average coast-wide production trends and resulted in over harvest of weak stocks in some years and failure to take advantage of large returns in other years. By the mid-l 990's, data relative to the distribution and abundance of many salmon stocks contributing to PST fisheries was improving. At the same time, there was increasing dissatisfaction with quota-based management and strong interest in instituting annual abundance-based management for stock aggregates that share geographic proximity of spawning areas, similar life history and genetic characteristics, and similar distributions in the ocean. Abundance-based management for aggregated stocks would establish and implement annual fishery exploitation rates in fisheries that insure long-term sustainability for all aggregates and related individual stocks. In the absence of bilateral agreement between the U.S. and Canada regarding implementation of abundance-based management, the three voting U.S. PSC Commissioners signed the 1996 Letter of Agreement (LOA) that defined elements of an abundance-based management approach for chinook salmon fisheries in southeast Alaska. The LOA was designed to: 1) set the stage for future bilateral negotiations regarding abundance based management; 2) clarify the role of PST fisheries in rebuilding depressed natural stocks; and 3) provide a means for sharing conservation responsibility of far-north migrating stocks originating from watersheds in Oregon and Washington. The foundation for abundance-based management set forth in the LOA was subsequently expanded upon and incorporated as Aggregate Abundance-Based Management (AABM) in Annex IV, Chapter 3 of the 1999 PST. Application of the abundance-based management outlined in the 1996 LOA and the subsequent 1999 amendments to the PST requires knowledge of the stock recruitment relationships, biological spawning escapement goals, and annual forecasts of ocean abundance and distribution for stocks in each aggregate to regulate fishery harvest. Managers must also have annual post-season estimates of aggregate specific exploitation rates and in-river escapements to assess the effectiveness of regulatory measures. The base-monitoring program for Oregon's coastal chinook under the 1985 PSC met only a few of these data requirements. In recognition of requirements for new and more precise data, the signatories of the original LOA sought out additional federal funds for new and expanded monitoring programs. Since 1997 Congress has annually approved approximately $1.8 million for additional research and monitoring needed to implement terms of the LOA. The PSC delegated discretionary authority for the use of those funds to the U.S. Section's Chinook Technical Committee (CTC). Title: A Proposal for an Integrated Research Monitoring Program for Oregon Coastal Chinook Populations Abstract -- Among the many chinook salmon populations contributing to large, mixed stock ocean net, troll, and recreational fisheries managed by the Pacific Salmon Commission (PSC) there is a good deal of diversity with respect to productivity, life history characteristics, and ocean distribution. During the years immediately following the adoption of the original 1985 Pacific Salmon Treaty (PST), lack of adequate data prevented the PSC from managing effectively for these differences. Instead, chinook management outlined in Annex IV of the original treaty was based upon long term population trends for very large aggregates of stocks. Although harvest ceilings were established as part of a PST recovery plan for over-exploited stocks, they were based on average coast-wide production trends and resulted in over harvest of weak stocks in some years and failure to take advantage of large returns in other years. By the mid-l 990's, data relative to the distribution and abundance of many salmon stocks contributing to PST fisheries was improving. At the same time, there was increasing dissatisfaction with quota-based management and strong interest in instituting annual abundance-based management for stock aggregates that share geographic proximity of spawning areas, similar life history and genetic characteristics, and similar distributions in the ocean. Abundance-based management for aggregated stocks would establish and implement annual fishery exploitation rates in fisheries that insure long-term sustainability for all aggregates and related individual stocks. In the absence of bilateral agreement between the U.S. and Canada regarding implementation of abundance-based management, the three voting U.S. PSC Commissioners signed the 1996 Letter of Agreement (LOA) that defined elements of an abundance-based management approach for chinook salmon fisheries in southeast Alaska. The LOA was designed to: 1) set the stage for future bilateral negotiations regarding abundance based management; 2) clarify the role of PST fisheries in rebuilding depressed natural stocks; and 3) provide a means for sharing conservation responsibility of far-north migrating stocks originating from watersheds in Oregon and Washington. The foundation for abundance-based management set forth in the LOA was subsequently expanded upon and incorporated as Aggregate Abundance-Based Management (AABM) in Annex IV, Chapter 3 of the 1999 PST. Application of the abundance-based management outlined in the 1996 LOA and the subsequent 1999 amendments to the PST requires knowledge of the stock recruitment relationships, biological spawning escapement goals, and annual forecasts of ocean abundance and distribution for stocks in each aggregate to regulate fishery harvest. Managers must also have annual post-season estimates of aggregate specific exploitation rates and in-river escapements to assess the effectiveness of regulatory measures. The base-monitoring program for Oregon's coastal chinook under the 1985 PSC met only a few of these data requirements. In recognition of requirements for new and more precise data, the signatories of the original LOA sought out additional federal funds for new and expanded monitoring programs. Since 1997 Congress has annually approved approximately $1.8 million for additional research and monitoring needed to implement terms of the LOA. The PSC delegated discretionary authority for the use of those funds to the U.S. Section's Chinook Technical Committee (CTC). Close

• 3564. [Article] A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001

  Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of ...

  Citation × Citation Citation Abstract Copy Title: A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001 Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of the North Umpqua steelhead population and its' habitat is a very high priority. The Oregon Department of Fish and Wildlife (ODFW) develops, on a continuing basis, practices designed to ensure the health and viability of this population. However, continued management success depends critically on the availability of data necessary for a detailed understanding of relevant life history issues. To address these data needs, ODFW began a radio-telemetry study of North Umpqua steelhead in June of 1998. Tagging at Winchester dam was terminated 10/26/00 but monitoring continued until the end of May 2001. This study has provided detailed information on movement patterns of adult steelhead in the basin at a level that is available in no other way and is the most comprehensive project of its type for the Umpqua Basin. A radio tagging study whose scope was limited to the Steamboat Creek subbasin was carried out previously (Wroble, 1990). Also, a previous study of temperature trends in that subbasin is of interest (Hostetler, 1991). Although similar radio telemetry studies ( e.g. Hockersmith et al, 1995) have been carried out in other basins, they are few. Title: A Radio Telemetry of Steelhead in the North Umpqua River Basin, 1998-2001 Abstract -- The North Umpqua steelhead (Oncorhynchus mykiss) represents one of the few remaining native anadromous fish populations in Oregon still at a relatively healthy level. The sustainability of the North Umpqua steelhead population and its' habitat is a very high priority. The Oregon Department of Fish and Wildlife (ODFW) develops, on a continuing basis, practices designed to ensure the health and viability of this population. However, continued management success depends critically on the availability of data necessary for a detailed understanding of relevant life history issues. To address these data needs, ODFW began a radio-telemetry study of North Umpqua steelhead in June of 1998. Tagging at Winchester dam was terminated 10/26/00 but monitoring continued until the end of May 2001. This study has provided detailed information on movement patterns of adult steelhead in the basin at a level that is available in no other way and is the most comprehensive project of its type for the Umpqua Basin. A radio tagging study whose scope was limited to the Steamboat Creek subbasin was carried out previously (Wroble, 1990). Also, a previous study of temperature trends in that subbasin is of interest (Hostetler, 1991). Although similar radio telemetry studies ( e.g. Hockersmith et al, 1995) have been carried out in other basins, they are few. Close