Browse by Archive

ResearchWorks at the University of Washington

View Archive Info

Trawls are used extensively during fisheries abundance surveys to derive estimates of fish density and, in the case of acoustic-based surveys, to identify acoustically sampled fish populations. However, trawls are selective in what fish they...
2013-07-23
2013-07-23
2013-07-23
2014-08-22
I investigated common patterns in North Pacific salmon abundance and marine fish recruitment and environmental drivers of these patterns. In Chapter 1 I identified patterns of covariation in the abundance of regional groups of wild pink salmon...
2013-07-23
2013-07-23
2014-08-22
A spatially explicit watershed and riparian habitat model was developed for quantifying site characteristics of riparian habitats of the lower Cedar River, Washington. The spatial complexity and distribution of combined habitat and anthropogenic...
2013-07-23
2013-07-23
2013-07-23
2014-08-22
Benthic heterotrophs living in aphotic aquatic habitats rely upon subsidies of detrital energy, in the form of complex organic molecules, which are synthesized by macrophytes and phytoplankton in the photic zone. Identifying the relative...
2013-07-25
2013-07-25
2014-08-22
Dolly Varden (Salvelinus malma) are a facultatively anadromous salmonid common around much of the north Pacific Rim, but little is known of the factors that determine their migration and life-history patterns. In the Chignik Lakes system on the...
2013-07-25
2013-07-25
2013-07-25
2014-08-22
The relative importance of environmental conditions and stock abundance in determining the productivity of fish stocks has been a subject of an on-going debate. The controversy can be formulated as four competing hypotheses: 1) productivity is...
2013-07-25
2013-07-25
2013-07-25
2014-08-22
The research in this Ph.D. dissertation focuses on the relationship between fishery-dependent catch-per-unit-effort (CPUE) and abundance and how its use when assessing and managing fisheries may be affected by some of its shortcomings. CPUE data...
2013-07-25
2013-07-25
2013-07-25
2014-08-22
Wild Steelhead Trout, Oncorhynchus mykiss, in the Puget Sound are currently in decline, and very little is known about the early life history of these threatened fish. This study evaluated consequences of early life growth in terms of survival to...
2013-11-14
2013-11-14
2013-11-14
2014-08-22
Partial migration, the behavior pattern in which a portion of a population migrates while others do not, is a widespread phenomenon with ecological and evolutionary consequences. Most Coho Salmon (Oncorhynchus kisutch) from...
2013-11-14
2014-05-14
2013-11-14
2014-08-22
Studying the results of selection may provide insights into the extent of adaptation, processes affecting population divergence, and gene diversity. Here, the role of adaptation in salmon evolution was evaluated at different taxonomic levels using...
2013-11-14
2013-11-14
2014-08-22
The endangered black abalone (Haliotis cracherodii) suffered devastating losses along the coasts of Southern California, primarily caused by the effects of withering syndrome. Subsequent recovery may be hindered by the Allee effect, which limits...
2013-11-14
2013-11-14
2013-11-14
2014-08-22
Non-native fishes have been stocked in freshwater ecosystems throughout the world to support recreational fishing opportunities. Since their initial introduction and establishment many of these species have spread, and future range expansions of...
2013-11-14
2013-11-14
2013-11-14
2014-08-22
Reproduction of walrus (Odobenus rosmarus) in zoos and aquaria has met with limited success. While basic information on reproductive characteristics is available, there is limited knowledge of reproductive physiology and endocrinology for walrus....
2014-02-24
2014-02-24
2014-02-24
2014-08-22
As the interface between land and sea, the nearshore (marine-terrestrial) ecotone converges at the intertidal zone, where the exchange of organic materials between ecosystems occurs in the form of beach wrack: piles of seaweed, seagrass, and...
2014-02-24
2014-02-24
2014-02-24
2014-08-22
The neonicotinoid insecticide imidacloprid (IMI) has been proposed for the control of burrowing shrimp on oyster beds in Willapa Bay, Washington. Use of IMI may be denied if it is shown that ESA-listed green sturgeon are adversely affected as a...
2014-02-24
2014-02-24
2014-02-24
2014-08-22
After near-extirpation in the early 20th century, beaver populations are increasing throughout many parts of North America. Simultaneously, there is an emerging interest in employing beaver activity for stream restoration in arid and semi-arid...
2014-02-24
2014-02-24
2014-02-24
2014-08-22
Understanding patterns of bacterial community diversity and composition associated with environmental gradients is crucial to better understand the processes underlying bacterial biogeography and potentially formulate predictions of how bacterial...
2014-02-24
2014-02-24
2014-02-24
2014-08-22
Aquaculture operations are a frequent and prominent cause of anthropogenic disturbance to marine and estuarine communities. In Puget Sound, Washington, aquaculture of the Pacific geoduck clam (Panopea generosa) is on the rise,...
2014-02-24
2014-02-24
2014-02-24
2014-08-22
Juvenile ecology can affect subsequent population dynamics. This work focuses on two aspects of juvenile steelhead (Oncorhynchus mykiss) ecology: 1) tradeoffs between naturally-spawned hatchery and wild fish, and 2) the distribution of family...
2014-04-30
2014-04-30
2014-04-30
2014-08-22
High mortality rates of Pacific salmon (Oncorhynchus spp.) in the nearshore ocean environment of the Columbia River (Northwest USA) is one of several key factors limiting recovery of these threatened and endangered fish. Several studies describe...
2014-04-30
2014-04-30
2014-04-30
2014-08-22
Persisting in the pelagic is not easy. The physical environment of pelagic ecosystems is highly dynamic. Unlike terrestrial systems where habitat complexity is driven by physical structure (e.g., vegetation and terrain), habitat complexity in...
2014-04-30
2014-04-30
2014-04-30
2014-08-22
The snow crab (Chionoecetes opilio) population in the eastern Bering Sea historically supported a lucrative fishery, but was declared overfished in 1999. The subsequent rebuilding plan did not rebuild the fishery in the time...
2014-04-30
2014-04-30
2014-04-30
2014-08-22
As global climate change accelerates, due in large part to increasing emissions of carbon dioxide and other greenhouse gases from fossil fuel use, agriculture, and large-scale changes in land use, natural ecosystems bear the consequences. For...
2014-04-30
2014-04-30
2014-04-30
2014-08-22
Sablefish (Anoplopoma fimbria) is a deep-water marine species in the Pacific Ocean with high commercial value. Limited information is available about male reproductive development and sperm physiology in sablefish or how to optimize fertilization...
2014-04-30
2014-04-30
2014-08-22
This study described the distribution and feeding of juvenile salmon (Oncorhynchus spp.) and Pacific herring (Clupea pallasi) in Puget Sound to explore the potential for resource competition among these species....
2014-04-30
2014-04-30
2014-08-22
1226 - 1250 of 1252 Items    << < 45 46 47 48 49 50 51 > >> 

© Western Waters Digital Library - GWLA member projects - Hosted and designed by the J. Willard Marriott Library