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As part of the National Park Services Inventory and Monitoring Program a freshwater fish inventory was conducted in the Central Alaska Network between 2001 and 2003. This network is comprised of Denali National Park and Preserve, Wrangell-St. Elias National Park and Preserve, and Yukon-Charley Rivers National Preserve. The purpose of this inventory was to document 90% of the expected yet undocumented species and to collect baseline data of species abundance and distribution. Angling, dip nets, electrofishing, a fyke net, gill nets, hoop traps, minnow traps, and snorkeling were all methods used in the 135 different sites that were sampled in the Central Alaska Network. Nine out of twenty one expected yet undocumented...
Harvests of Yukon Chinook salmon increased in the mid-1970s, then declined during 1998 to 2007 in response to fewer returning salmon. We examined annual growth of age-1.3 and age-1.4 Yukon Chinook salmon scales, 1965-2004, and tested the hypothesis that shifts in Chinook salmon abundance were related to annual growth at sea. Annual scale growth trends were not significantly correlated with salmon abundance indices, sea surface temperature, or climate indices, although growth during the first year at sea appeared to have been affected by the 1977 and 1989 ocean regime shifts. Chinook salmon scale growth was dependent on growth during the previous year, a factor that may have confounded detection of relationships...
Data from high seas tagging experiments (external tags, coded-wire tags, electronic data storage tags) provide the only direct information on the distribution, biology, and ecology of immature and maturing Arctic-Yukon-Kuskokwim (AYK) salmon (Oncorhynchus spp.) migrating in the North Pacific Ocean and Bering Sea. Variation in the spatial and temporal distribution of tagging effort largely reflects changes in international salmon treaty research priorities over the past 52 years (1954-2006). Results of tagging studies indicate that in spring maturing AYK pink O. gorbuscha and coho O. kisutch salmon and immature and maturing AYK sockeye O. nerka and chum O. keta salmon are distributed primarily in the northeastern...
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Marine-derived nutrients (MDN) delivered by spawning Pacific salmon ( Oncorhynchus spp.) contribute to the productivity of riverine ecosystems. Optimizing methods for measuring MDN assimilation in food webs will foster the development of ecologically based resource management approaches. This dissertation aims to better understand relationships among spawning salmon abundance, biochemical measures of MDN assimilation, and the fitness of stream-dwelling fishes. The goals of my first research chapter were (1) to understand the factors that influence stable isotope (δ 13 C, δ 15 N, and δ34 S) and fatty acid measures of MDN assimilation in stream and riparian biota, and (2) to examine the ability of these measures to...
map background search result map search result map Marine-derived nutrients in riverine ecosystems: Developing tools for tracking movement and assessing effects in food webs on the Kenai Peninsula, Alaska Dynamic in-lake spawning migrations by female sockeye salmon Abundance and run timing of adult salmon in Henshaw Creek, Kanuti National Wildlife Refuge, Alaska, 2000-2003 Participation decisions, angler welfare, and the regional economic impact of sportfishing Middle Kuskokwim Chinook Salmon Angler Survey, 2000 Kuskokwim River chum salmon run reconstruction Evolution of mitochondrial DNA variation within and among Yukon River chum salmon populations Genetic Baseline of Kenai River Chinook Salmon for Mixed Stock Analyses, 2013 Yukon River chum salmon : report for genetic identification studies, 1992-1997 Estimation of fall chum salmon abundance on the Tanana and Kantishna Rivers using mark-recapture techniques, 2001 Freshwater Fish Inventory of Denali National Park and Preserve, Wrangell-St. Elias National Park and Preserve, and Yukon-Charley Rivers National Preserve, Central Alaska Inventory and Monitoring Network Body Condition and Feeding Ecology of Kuskokwim River Chum Salmon (Oncorhynchus keta) During Freshwater Outmigration Genetic Baseline of Kenai River Chinook Salmon for Mixed Stock Analyses, 2013 Abundance and run timing of adult salmon in Henshaw Creek, Kanuti National Wildlife Refuge, Alaska, 2000-2003 Marine-derived nutrients in riverine ecosystems: Developing tools for tracking movement and assessing effects in food webs on the Kenai Peninsula, Alaska Dynamic in-lake spawning migrations by female sockeye salmon Participation decisions, angler welfare, and the regional economic impact of sportfishing Estimation of fall chum salmon abundance on the Tanana and Kantishna Rivers using mark-recapture techniques, 2001 Freshwater Fish Inventory of Denali National Park and Preserve, Wrangell-St. Elias National Park and Preserve, and Yukon-Charley Rivers National Preserve, Central Alaska Inventory and Monitoring Network Middle Kuskokwim Chinook Salmon Angler Survey, 2000 Kuskokwim River chum salmon run reconstruction Body Condition and Feeding Ecology of Kuskokwim River Chum Salmon (Oncorhynchus keta) During Freshwater Outmigration Evolution of mitochondrial DNA variation within and among Yukon River chum salmon populations Yukon River chum salmon : report for genetic identification studies, 1992-1997