Skip to main content
USGS - science for a changing world
Advanced Search

Filters: Categories: Publication (X) > Extensions: Shapefile (X)

5,450 results (53ms)   

Filters
Date Range
Extensions (Less)
Types (Less)
Contacts (Less)
Categories (Less)
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
The Joint Technical Committee (JTC) of the United States and Canada serves as a scientific advisory body to the Yukon River Panel. The JTC discusses harvest and escapement goals, management trends, postseason reviews and preseason outlooks, and results of cooperative research projects. The report summarizes the status of salmon stocks (Chinook, coho, summer and fall chum salmon) in 2008 with reference to historical data, presents an outlook for the 2009 season, and provides data on the utilization of salmon species by commercial and subsistence (aboriginal) harvests, personal use (domestic) and sport (recreational) fishery. The report further compiles summaries of Yukon River projects (e.g., mark-recapture, sonar,...
thumbnail
Summary: "Total Hg (THg) and methylmercury (MeHg) were examined in muscle and liver samples of salmon species (Chinook: Oncorhynchus tshawytscha; Chum: O. keta; Sockeye: O. nerka; Coho: O. kisutch) and freshwater fish species (Pike: Esox lucius; Grayling: Thymallus arcticus; Whitefish: Caregonus nelsoni) collected in 1999 and 2000 from the Western Alaska rivers (Yukon, Kuskokwim, Nushagak and Kvichak). The THg in salmon muscles has a mean value of 62 ng/g (ww). In Pike muscles, THg has a mean value of 879 ng/g. The mean concentrations of THg in Grayling and Whitefish muscle are 153 ng/g and 32 ng/g respectively. In salmon muscle and liver the MeHg levels constitute 77% and 62% of the THg levels, respectively. In...
thumbnail
PURPOSE: The deployment of a national missile defense (NMD) program in Alaska, California, Massachusetts, and North Dakota is considered. The NMD system would be a fixed, land-based, non-nuclear missile defense system with a land- and space-based detection system capable of responding to limited strategic ballistic missile threats to the United States. The proposed Alaskan sites include Clear Air Force Station (AFS) in Denali Borough, Eareckson Air Station (AS) on Shemya Island, Eielson Air Force Base (AFB) in Fairbanks North Star Borough, Fort Greely, and Yukon Training Area in Fairbanks North Star Borough. The proposed California site is Beale AFB. The proposed Massachusetts site is Cape Cod AFS. The proposed...
thumbnail
We present a novel ice/firn core melter system that uses fraction collectors to collect discrete, high-resolution (32 trace elements by inductively coupled plasma sector field mass spectrometry (ICP-SMS), and stable oxygen and hydrogen isotopes by isotope ratio mass spectrometry (IRMS). The new continuous melting with discrete sampling (CMDS) system preserves an archive of each sample, reduces the problem of incomplete particle dissolution in ICP-SMS samples, and provides more precise trace element data than previous ice melter models by using longer ICP-SMS scan times and washing the instrument between samples. CMDS detection limits are similar to or lower than those published for ice melter systems coupled directly...
thumbnail
Chum salmon (Oncorhynchus keta) are the most abundant species of salmon spawning in the Yukon River drainage system, and they support important personal use, subsistence, and commercial fisheries. Chum salmon returning to the Tanana River in Interior Alaska are a significant contribution to the overall abundance of Yukon River chum salmon and an improved understanding of habitat use is needed to improve conservation of this important resource. We characterized spawning habitat of chum salmon using the mainstem Tanana River as part of a larger study to document spawning distributions and habitat use in this river. Areas of spawning activity were located using radiotelemetry and aerial helicopter surveys. At 11 spawning...


map background search result map search result map Assessment of Coho Salmon from the Kenai River, Alaska, 1997 Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Land cover disturbances and feedbacks to the climate system in Canada and Alaska Upper Cook Inlet commercial herring and smelt fisheries, 2004 Yukon River salmon 2008 season summary and 2009 season outlook Angler Harvest Survey: Nares River 2009 Angler Harvest Survey: Bennet Lake 2009 Biotic interactions in temporal trends (1992–2010) of organochlorine contaminants in the aquatic food web of Lake Laberge, Yukon Territory Fish habitats and use in the Tanana River floodplain near Big Delta, Alaska, 1999-2000 Biogeography of select avian species in Alaska’s National Parks Continuous Ice Core Melter System with Discrete Sampling for Major Ion, Trace Element, and Stable Isotope Analyses Characteristics of fall chum salmon spawning habitat on a mainstem river in Interior Alaska Fishery Management Report for Sport Fisheries in the Lower Yukon-lower Kuskokwim Management Area for 1999 and 2000 Sonar estimation of chum salmon passage in the Aniak River, 2009 NATIONAL MISSILE DEFENSE DEPLOYMENT; FORT GREELY, SHEMYA ISLAND, AND DENALI AND FAIRBANKS NORTH STAR BOROUGHS, ALASKA, CALIFORNIA, MASSACHUSETTS, AND CAVALIER, GRAND FORKS, PEMBINA, RAMSEY, AND WALSH COUNTIES, NORTH DAKOTA Growing together: A principle-based approach to building collaborative Indigenous partnerships in Canada’s forest sector Seasonal foraging strategies of Alaskan gray wolves (<i>Canis lupus</i>) in a salmon subsidized ecosystem Impacts of Climate Warming on River Ice Break-up and Snowmelt Freshet Processes on the Porcupine River in Northern Yukon The Peel Watershed Case: Implications for Aboriginal Consultation Angler Harvest Survey: Nares River 2009 Impacts of Climate Warming on River Ice Break-up and Snowmelt Freshet Processes on the Porcupine River in Northern Yukon Biotic interactions in temporal trends (1992–2010) of organochlorine contaminants in the aquatic food web of Lake Laberge, Yukon Territory Characteristics of fall chum salmon spawning habitat on a mainstem river in Interior Alaska Assessment of Coho Salmon from the Kenai River, Alaska, 1997 Seasonal foraging strategies of Alaskan gray wolves (<i>Canis lupus</i>) in a salmon subsidized ecosystem Fish habitats and use in the Tanana River floodplain near Big Delta, Alaska, 1999-2000 Upper Cook Inlet commercial herring and smelt fisheries, 2004 The Peel Watershed Case: Implications for Aboriginal Consultation Fishery Management Report for Sport Fisheries in the Lower Yukon-lower Kuskokwim Management Area for 1999 and 2000 Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Yukon River salmon 2008 season summary and 2009 season outlook Biogeography of select avian species in Alaska’s National Parks Land cover disturbances and feedbacks to the climate system in Canada and Alaska Growing together: A principle-based approach to building collaborative Indigenous partnerships in Canada’s forest sector NATIONAL MISSILE DEFENSE DEPLOYMENT; FORT GREELY, SHEMYA ISLAND, AND DENALI AND FAIRBANKS NORTH STAR BOROUGHS, ALASKA, CALIFORNIA, MASSACHUSETTS, AND CAVALIER, GRAND FORKS, PEMBINA, RAMSEY, AND WALSH COUNTIES, NORTH DAKOTA