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826 - 850 of 2700 Items << < 29 30 31 32 33 34 35 36 37 38 > >>
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The within-host interactions that can occur as a result of mixed infections in wildlife likely influence the outcome of an infection. We investigated the infection frequency and outcome as well as the potential mechanisms regulating mixed...
2014-08-07 (iso8601)
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The evolution of management institutions for the British Columbia salmon fishery is examined, focussing on the
period from 1900 to 1930. Various property rights allocations, including exclusive fishing rights, limited fishing licences, and
limited...
2001 (iso8601)
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also have had marked effect upon the soil types developed.
In the lower, southwestern part of the Big Bend the soils were formed under a sagebrush cover. They are gray to light brown in color, are low in organic matter, and vary markedly in...
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VI. Seismic Events in Salmon and Hydropower Policy
Many of the activities of the 1980s rested on a certain set of assumptions about the relationships of rivers, salmon, and human activities. In the 1990s, three developments called these... |
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Species Act listings made sense. The Nez Perce sought the return of harvestable salmon. Wallowa County wanted fish back, but also to protect livelihoods, many of which depended on the forests, pastures and streams of this scenic, isolated valley....
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Image Caption: FISHWHEEL AND VILLAGE OF CASCADE LOCKS --page break-- Where fish-wheels are ineffective because of lack of current, salmon are ensnared in fish-traps. These consist of a rectangular, net-lined enclosure of driven piling, called...
2004-07-26
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Looking upstream in the Lower Middle Fork of the Salmon River
1941-06-27
2003-01-01 |
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Photo shows Archie Anderson and an assistant obtaining eggs from gravid chinook salmon by slitting belly at the salmon hatchery on the Middle Fork of the Santiam River near Foster, Oregon; 1940-09-25
2024-11-22
2003-01-01 |
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Right-hand side of Salmon Creek Falls, tributary to Middle Fork Willamette River;1937-09
2024-11-22
2003-01-01 |
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Caption on mount: McGowan's Cannery, Chinook, Columbia River, Washington
PH Coll 293.46 |
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Caption on mount: Salmon net wrecked by a sealion. Pacific Ocean, Washington
PH Coll 293.28 |
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In light of recent recoveries of marine mammal populations worldwide and heightened concern about their impacts on marine food webs and global fisheries, it has become increasingly important to understand the potential impacts of large marine...
2019-12-16
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INPFC
2008-10-03
2008-10-03 1992-11-22 |
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Water and geology: how does geology control where you find and how you use water? / Roddey, James -- Through the eyes of the state geologist / Beaulieu, John D. -- What is groundwater? -- Geology and groundwater -- Who owns and manages Oregon's...
2024-11-22
2005-02-18 |
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We evaluated the relative importance of "bottom-up" (production-limited) and "top-down" (predator-mediated) processes during early marine residence in a population of Chinook salmon (Oncorhynchus tshawytscha) from the upper Columbia River, USA. We...
2013-04 (iso8601)
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San Francisco Bay is a proposed relocation site for some of the Caspian terns Hydroprogne caspia currently nesting at the world's largest colony for the species in the Columbia River estuary and consuming salmonids listed under the U. S....
2012-11-01 (iso8601)
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Snow and glaciers in the catchment basins here on the headwater of Snow Creek, high in the Cascade Mountains, made this drainage an excellent source of cold-water supply for hatchery operations during the hot summer months. Plans for the control...
2024-11-22
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A nested mating experiment in which 20 males were each mated
to four different females was used to obtain an estimate of the heritability
of resistance to death from gas bubble disease in Columbia
River fall chinook salmon (Oncorhynchus...
1974-05-09 (iso8601)
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Intense infections of the gill pathogen Dermocystidium salmonis were associated with mortality of prespawning chinook salmon Oncorhynchus tshawytscha in several Oregon rivers in 1988. The occurrence of the pathogen in returning adult chinook...
1995-06 (iso8601)
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Some years ago, the U.S. Dept. of Agriculture undertook a study of the nutrient profile of the leading species of
cultivated and wild fish and shellfish. Some data from that work were published, but information on fatty acids was not
included....
2001 (iso8601)
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This paper provides probit estimates of willingness to pay for Snake River salmon
recovery projects using the contingent value survey method. Two types of survey method
are tested, the direct question format and the randomized response format....
1997-06-12 (iso8601)
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The goal of the Oregon Plan is to restore wild coho and wild steelhead runs. Under the federal
Endangered Species Act, wild coho salmon along the Oregon Coast are listed as Threatened and wild
Oregon Coast steelhead are a candidate for listing....
2000 (iso8601)
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A 22 ha, 1S yeas old, diked permanent pasture in the Salmon River estuary in Lincoln County, Oregon, was chosen for a study to determine the potential for natural salt marsh restoration with dike breaching. Two undiked fragments of relatively...
1981-08-21 (iso8601)
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VI. Seismic Events in Salmon and Hydropower Policy
Many of the activities of the 1980s rested on a certain set of assumptions about the relationships of rivers, salmon, and human activities. In the 1990s, three developments called these... |
