The system be down for regular maintenance on April 3rd, 2024 from 8:00-10:00am.
Browsing Fisheries by Title
Now showing items 9-28 of 238
-
Analyzing the chemical tracers in fin rays: a non-lethal approach to infer the migratory patterns of bull trout
Effective management and conservation of migratory species requires identifying the habitats that individuals within and among populations use throughout their lives. As a diversity of life history strategies can buffer ... -
Applied ecosystem chemistry: linking biogeochemical and physiological processes to ecological interactions
Physical environments are changing globally due to anthropogenic impacts which have the potential to alter ecological interactions. To understand how ecological interactions are changing, long-term datasets are necessary ... -
Applying the Ideal Free Distribution Theory to two mobile predators on Pacific salmon: Commercial fishers and brown bears
Many ecological theories have been developed to shed light on the movement patterns of mobile predators foraging on their prey. Apex predators face additional challenges in needing to track mobile prey, both spatially and ... -
Assessing the Utility of Tributary PIT-Tag Arrays in Monitoring Snake River Salmonid Recovery
Passive integrated transponder (PIT) tag technology is used in the Columbia River basin to monitor migration of threatened and endangered salmonid populations. From 2010 to 2018, the number of tag detection arrays installed ... -
Assessment of mesh size selectivity under commercial fishing conditions
(1996)The present study is entirely focus on the analysis selectivity from alternate-haul experiments performed on fishing grounds off the coasts of Washington, Oregon and northern California, and in the Bering Sea, under ... -
An Assessment of the Impact of Non-Native Lake Trout Salvelinus namaycush and Mysis diluviana on the Growth and Survival of Pelagic Planktivores in Lake Tahoe
Due to introductions of non-native species and the extirpation of native species, the food web of Lake Tahoe has undergone many changes over the past century. This study quantified temporal and ontogenetic trophic interactions ... -
At the intersection of fisheries and climate change: Emergent challenges for Pacific salmon management in a warming world
A changing environment is not a new challenge for Pacific salmon. This group of fishes has proven resilient, persisting over millions of years while surviving massive changes in climate and physical habitats. There is ... -
Beluga whale distribution, migration, and behavior in a changing Pacific Arctic
Sea ice is disappearing at unprecedented rates in the Pacific Arctic with potential impacts to ice-associated marine predators that migrate to this seasonally accessible and productive ecosystem. In this dissertation I ... -
Biology and fisheries for the spot prawn (Pandalus platyceros, Brandt 1851)
(2007)In this dissertation I investigate aspects of the biology and fisheries for the spot prawn (Pandalus platyceros Brandt 1851). I clarified several basic biological issues, including the geographic range and the length of ... -
Biophysical mechanisms underlying the recruitment process in walleye pollock (Theragra chalcogramma)
(1999)Recruitment variability in marine fish species is not well understood, yet is very important as a component of fishery management. This dissertation describes a set of coupled biological and physical simulation models ... -
Carbon Dynamics on Floodplains of the Yangtze and Mekong Rivers
The lateral expansion and contraction of rivers across their floodplains inextricably links aquatic and terrestrial ecosystem processes for part of each year, yet our understanding of the ecological responses to this ... -
Challenges and opportunities for aquatic ecosystem management with uncertain global change
Society is faced with the task of effectively managing to enable ecosystem resilience to anthropogenic stressors and future change. Ecosystems are part of complex social-ecological systems where humans impact ecosystems ... -
Characterizing fish schools in relation to the marine environment and their use by seabirds in lower Cook Inlet, Alaska
(2004)The primary purpose of this study has been to investigate the effects of environmental variability on seabird distributions and abundances at sea in lower Cook Inlet, Alaska. Sources of variability in seabird densities ... -
Characterizing the effects of ocean acidification in larval and juvenile Manila clam, Ruditapes philippinarum, using a transcriptomic approach
(2012)Ocean acidification as a result of anthropogenic carbon dioxide (CO2) emissions and global climate change poses a risk to the ecological landscape of intertidal and shallow subtidal communities. The organisms that inhabit ... -
Climate Change and Density Dependence in the North Pacific: Applications to Salmon Run Forecasting and Plankton Population Dynamics
We explore the role of density dependence and climate change in impacting different trophic levels of the North Pacific Ocean which supports some of the world’s largest fisheries. First, we evaluated the use of density ... -
Climate change and geomorphic evolution in an Alaskan watershed and implications for salmon production
(2013-04-17)Freshwater ecosystems are not only the source of a disproportionate number of ecosystem services given their relative area on the planet, but they are also highly sensitive to anthropogenic impacts including climate change. ... -
Combining bottom trawl and acoustic data to improve survey derived abundance estimates of semipelagic species
Abundances of semipelagic fishes are often estimated using acoustic or bottom trawl (BT) surveys, both of which sample a fraction of the water column. Acoustic instruments are effective at sampling the water column, but ... -
Community Effects of the Non-Indigenous Aquatic Plant Water Hyacinth (Eichhornia crassipes) in the Sacramento/San Joaquin Delta, California
(University of Washington, 2000)Biological invaders are widespread and can alter population dynamics and community structure of native ecosystems. Substantial habitat alteration by nonindigenous species can additionally affect the surrounding community. ... -
Comparative resource utilization of eastern North Pacific skates with applications for fisheries management
Skates (Rajiformes: Rajoidei) are an extremely diverse group of cartilaginous, marine fishes that are common mesopredators in benthic communities. Population declines, shifts in assemblage structure, and ecological ... -
Competition between non-native brook trout and coho salmon in the Elwha River, WA during dam removal
The removal of two dams on the Elwha River, WA is the largest dam removal project in US history. A major goal of this project is to restore historically abundant populations of Pacific salmon to the river, so it is important ...