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Invasive species are a concern worldwide as they can displace native species, reduce biodiversity, and disrupt ecological processes. European bird cherry (Prunus padus) (EBC) is an invasive ornamental tree that is rapidly spreading and possibly displacing native trees along streams in parts of urban Alaska. The objectives of this study were to: 1) map the current distribution of EBC along two Anchorage streams, Campbell and Chester creeks, and 2) determine the effects of EBC on selected ecological processes linked to stream salmon food webs. Data from the 2009 and 2010 field seasons showed: EBC was widely distributed along Campbell and Chester creeks; EBC leaf litter in streams broke down rapidly and supported similar...
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Report is divided into three sections. In Section I, an overview of the Arctic-Yukon-Kuskokwim Management Area is provided, including a description of the area and subareas, Board of Fish activities, and management information and activities. In Section II, effort and harvest results are presented. In Section III, more detailed summaries of major fisheries and activities are provided
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Concerns regarding the size and sex composition of Yukon River Chinook salmon Oncorhynchus tshawytscha have been expressed in public meetings for over a decade. However, reports of small size and low numbers of females have become increasingly common in recent years, and apprehension over the long-term health of the stock has grown within the drainage. In response to these reports, the Salmon Size Subcommittee of the US/Canada Yukon River Joint Technical Committee was formed and charged with advising the Committee, and thereby the US/Canada Yukon River Panel, with respect to changes in Chinook salmon age, sex, and size composition. This report, which summarizes the findings of prior investigations and the scientific...
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Country of origin provides the basis for allocating harvests of Yukon River chum salmon. The genetic divergence among Yukon River chum salmon populations adjacent to the international border as revealed by allozyme and micro satellite variation is insufficient to determine the country of origin of returning fish using mixed-stock analysis (MSA). Consequently, we investigated the resolution provided by alternative genetic markers in an attempt to detect levels of divergence that would be sufficient for MSA. We analyzed 10 Yukon River chum salmon populations for variation at 30 variable amplified fragment length polymorphism (AFLP) loci and for mitochondrial DNA (mtDNA) restriction site variation. We assessed these...
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Report is divided into two sections. In Section I, an introductory overview of the Northern Cook Inlet Management Area is presented, including: a general geographic and organizational description of the management area; an inventory of the available fishery resources; an overview of the Alaska Board of Fisheries processes; existing management plans; a historical perspective of recreational angler effort, catch and harvest; and an approximation of the economic value of the recreational fisheries. A general description of research, management and educational activities, ongoing access programs, and a summary of the current major biological and social issues in the management area are also presented. In Section II,...
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Information specific to recreational fisheries in the Kuskokwim-Goodnews Management Area in 2011 and preliminary information for 2012 is presented. Estimates of fishing effort, total catch, and effort is summarized through the 2011 season. This information is provided to the Alaska Board of Fisheries (board), as well as to the general public and interested parties. Summaries of major fisheries within the area are detailed, including descriptions of the performance of these fisheries, regulatory actions by the board, social and biological issues, and descriptions of ongoing research and management activities. The remote waters of the Kuskokwim-Goodnews Management Area supported approximately 22,000 angler-days of...
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At northern limits of a species? distribution, fish habitat requirements are often linked to thermal preferences, and the presence of overwintering habitat. However, logistical challenges and hydrologic processes typical of glacial systems could compromize the identification of these habitats, particularly in large river environments. Our goal was to identify and characterize spawning habitat for fall-run chum salmon Oncorhynchus keta and model habitat selection from spatial distributions of tagged individuals in the Tanana River, Alaska using an approach that combined ground surveys with remote sensing. Models included braiding, sinuosity, ice-free water surface area (indicating groundwater influence), and persistent...
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Since 1996, U.S. Fish and Wildlife Service biologists have annually used fish wheels to capture migrating adult fall chum salmon Oncorhynchus keta in the main-stem Yukon River, Alaska, and estimated their abundance via mark- recapture methods. In each year of the study, the mark rate of captured fish at a site near Rampart has been substantially greater than rates observed at numerous locations upriver of that site. The factors most likely to cause the observed reduction in the mark rate are violations of mark-recapture model assumptions or the mortality of marked fish between the Rampart site and upriver locations. Results of studies conducted through 2000 were most consistent with the hypothesis of mortality....
map background search result map search result map Ecological effects of invasive European bird cherry (Prunus padus) on salmonid food webs in Anchorage, Alaska streams Potential Causes of Size Trends in Yukon River Chinook Salmon Populations Fishery Management Report for Sport Fisheries in the Arctic-Yukon- Kuskokwim Management Area, 1999-2000 A Remote-Sensing, GIS-Based Approach to Identify, Characterize, and Model Spawning Habitat for Fall-Run Chum Salmon in a Sub-Arctic, Glacially Fed River Estimates of total annual return of Chinook salmon to the Kuskokwim River, 2002-2007 Area Management Report for the Recreational Fisheries of Northern Cook Inlet, 2001 and 2002 Fishery management report for sport fisheries in the Kuskokwim-Goodnews management area, 2011 Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River A method to bin alleles of genetic loci that maintains population heterogeneity Kuskokwim River Chinook and Chum Salmon Stock Status and Kuskokwim Area Fisheries: A Report to the Alaska Board of Fisheries Residual Effects from Fish Wheel Capture and Handling of Yukon River Fall Chum Salmon 2003 Yukon River Chinook Telemetry Surveys in the Tr’ondek Hwech’in Traditional Territory Compilation and mapping of fisheries information within the Teslin Tlingit traditional territory. Prepared for Teslin Tlingit Council Conservation of Western Alaskan Salmon Stocks by Identifying Critical Linkages between Marine and Freshwater Life Stages and Long-term Monitoring Population Genetics and the Management of Arctic-Yukon-Kuskokwim Salmon Populations A Hierarchical Framework to Identify Influences on Pacific Salmon Population Abundance and Structure in the Arctic-Yukon-Kuskokwim Region Application of molecular markers to mixed-stock analysis of Yukon River fall chum salmon Estimated abundance of adult fall chum salmon in the middle Yukon River, Alaska, 1998-1999 Sonar estimation of chum salmon passage in the Aniak River, 2009 Linking climate change projections for an Alaskan watershed to future coho salmon production Ecological effects of invasive European bird cherry (Prunus padus) on salmonid food webs in Anchorage, Alaska streams Linking climate change projections for an Alaskan watershed to future coho salmon production Sonar estimation of chum salmon passage in the Aniak River, 2009 Compilation and mapping of fisheries information within the Teslin Tlingit traditional territory. Prepared for Teslin Tlingit Council Area Management Report for the Recreational Fisheries of Northern Cook Inlet, 2001 and 2002 A Remote-Sensing, GIS-Based Approach to Identify, Characterize, and Model Spawning Habitat for Fall-Run Chum Salmon in a Sub-Arctic, Glacially Fed River Estimates of total annual return of Chinook salmon to the Kuskokwim River, 2002-2007 Fishery management report for sport fisheries in the Kuskokwim-Goodnews management area, 2011 Kuskokwim River Chinook and Chum Salmon Stock Status and Kuskokwim Area Fisheries: A Report to the Alaska Board of Fisheries 2003 Yukon River Chinook Telemetry Surveys in the Tr’ondek Hwech’in Traditional Territory Population Genetics and the Management of Arctic-Yukon-Kuskokwim Salmon Populations Estimated abundance of adult fall chum salmon in the middle Yukon River, Alaska, 1998-1999 Conservation of Western Alaskan Salmon Stocks by Identifying Critical Linkages between Marine and Freshwater Life Stages and Long-term Monitoring Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River A method to bin alleles of genetic loci that maintains population heterogeneity Residual Effects from Fish Wheel Capture and Handling of Yukon River Fall Chum Salmon Potential Causes of Size Trends in Yukon River Chinook Salmon Populations Application of molecular markers to mixed-stock analysis of Yukon River fall chum salmon Fishery Management Report for Sport Fisheries in the Arctic-Yukon- Kuskokwim Management Area, 1999-2000 A Hierarchical Framework to Identify Influences on Pacific Salmon Population Abundance and Structure in the Arctic-Yukon-Kuskokwim Region