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251 - 275 of 2700 Items << < 6 7 8 9 10 11 12 13 14 15 > >>
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Pacific Salmon are anadromous fish that cross state and international boundaries in their oceanic migrations. Fish
spawned in the rivers of one jurisdiction are vulnerable to harvest in other jurisdictions. The rocky history of attempts by the...
2001 (iso8601)
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The principal objective of the study was first to
present a historical discussion of foreign and domestic
trade in canned salmon in the United States and Canada, and
secondly, to estimate the ex-vessel derived demand characteristics
for red and...
1972-08-11 (iso8601)
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There are seven commercially important species of salmon and trout (genera Oncorhynchus and Salmo) in North America, many of which are closely related but command markedly different prices. The purpose of this research was to provide improved and...
2009-12-14 (iso8601)
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Aquatic ecological investigation is expanding to encompass considerations of
multiple scales across large landscapes. Much of the analysis included in this work
focuses specifically on coho salmon (Oncorhynchus kisutch) in multiple subbasins on...
2007-11-26T20:53:33Z (iso8601)
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3. The 1992-1993 Biological Opinions and the Strategy for Salmon
The National Marine Fisheries Service listed Snake River sockeye salmon as endangered in late 1991,163 and Snake River chinook listings soon followed.164 With little time to...
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The Salmon Poisoning Research Collection consists of research materials dealing with Salmon poisoning, manuscripts and journal articles, and personal correspondence. Most papers pertain directly to the evolution of study of the trematode...
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In spite of the progressive restrictions of the commercial river fishery during the past fifty years, the trend of the salmon populations of the coastal rivers has been downward. It is almost impossible to isolate and analyze separately the causes...
1950 (iso8601)
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Spring chinook salmon, Oncorhynchus tshawytscha, in the Snake River Basin
are listed as endangered under the Endangered Species Act. The typical life history of spring
chinook salmon is semelparous. An experiment was performed to see if mature...
2002-04-16 (iso8601)
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The primary purpose of the study was to identify the demand
for processed salmon from the West Coast. The basic approach in
the demand analysis was to identify those variables that determine
the supply and demand for processed salmon. An...
1969-09-04 (iso8601)
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For Pacific salmon, the evolution of local adaptations depends upon the species' propensity to return, or "home", to natal streams at time of reproduction. Pacific salmon use olfactory cues to guide homing behavior, yet little is known about the...
2009-05-18T20:08:09Z (iso8601)
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The West Fork Smith River, a 69 km2 watershed in the Coast Range of Oregon, is prone to short periods of very high water temperature in mid-summer due to a combination of human and natural influences. In the summers of 2003 and 2004 more than 400...
2005-12-14T17:56:43Z (iso8601)
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1. Loss of Tributary Habitat
Salmon are particularly sensitive to habitat degradation. They need cool, clean, running streams and healthy alluvial floodplains in which to reproduce and grow.' They require streamside riparian cover, large, woody...
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An avid amateur photographer, W. Chester "Chet" Ullin worked for the Washington State Fisheries Dept. and the West Coast Lumberman's Association in 1945, which is likely when the photographs in this collection were taken. The collection consists...
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Most modeling and statistical approaches encourage simplicity, yet ecological processes are often complex, as they are influenced by numerous dynamic environmental and biological factors. Pacific salmon abundance has been highly variable over the...
2013-01-11 (iso8601)
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Climate, competition, and disease are well-recognized drivers of population dynamics and can be intertwined by animal migrations with consequences for the ecosystems and economies that depend on them. Sockeye salmon from the Fraser River of...
2014-07-07 (iso8601)
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rivers and lakes and migrate downstream as juveniles. In the estuary at the river's mouth, they transform from freshwater fish to saltwater fish, then enter the ocean where they migrate far north or south, feed and mature for several years. They...
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Exceptional data are available for the study of the salmon runs of the Columbia River in 1938. Detailed figures on catch were supplied by Oregon and Washington in such form that they could readily be combined with the counts at Bonneville Dam to...
1942 (iso8601)
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Trophic interactions within and among species vary widely across spatial scales and species’ ontogeny. However, the drivers and implications of this variability are not well understood. Juvenile Chinook salmon Oncorhynchus tshawytscha have a wide...
2015-10-14 (iso8601)
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Previous studies have shown that juvenile chinook salmon Oncorhynchus tshawytscha exposed in the field or the laboratory to polychlorinated biphenyls (PCBs), an anthropogenic stressor, are immunosuppressed. It is not known whether simultaneous...
2003-03 (iso8601)
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To model the behavior of the spring run Chinook salmon, we expanded the current dataset of salmon counts at the Winchester Dam, Winchester, Oregon, to include historical data from 1991 through 1997. These counts were used to identify Chinook...
2015-06-08 (iso8601)
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Approximately $1 billion a year is spent on salmon in the Pacific
Northwest. Spending has escalated, yet the number of wild runs
placed under the protection of the Endangered Species Act has
increased, creating social and political controversy....
2000-06-06 (iso8601)
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Manuscripts, correspondence, films,
photographs, slides, and outdoor recreation and travel literature chiefly
concerning hunting and fishing.; Leslie Lee Richardson was born in the small mining town of Wardner,
Idaho, on April 3, 1898,...
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Structured estuarine habitats, such as salt marshes, seagrass beds, and oyster reefs, are recognized as critical nurseries for juvenile fish and crustaceans. Estuarine habitat usage by fish, including juvenile Pacific salmon Oncorhynchus spp., was...
2015 (iso8601)
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The community of trophically transmitted marine parasites of juvenile coho (Oncorhynchus kisutch) and Chinook
(Oncorhynchus tshawytscha) salmon across 8 years (2002–2009) was related to indices of physical and biological ocean conditions
and adult...
2014-11 (iso8601)
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Rising consumer concern over intensive food production issues has resulted in an increase in demand for organic
alternatives to a wide variety of foods including fruit and vegetables, meat and poultry. More recently, there has also been...
2001 (iso8601)
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