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Most parasites and their hosts live in a balance within their environment; however a disease outbreak can occur when either the parasite, host, or environment, are perturbed. Myxozoan parasites are associated with a wide variety of cultured and...
2013-09-26 (iso8601)
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blocks of more productive agricultural lands in the Cowlitz and Lewis basins. The bottom lands along the lower courses of these streams are similar to the new alluviums of the Willamette Valley but are less extensive.
Red soils comparable to...
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and Weiser Rivers to the edge of the mountains. Lesser acreages are found along the streams of the other agricultural valleys of the area. These soils are brown to dark-brown in color, with lighter-colored subsoils. Although in most cases the...
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"Serial no. 107-39."
2024-04-26
2005-03-17 2004-12-21 |
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This thesis reports the results of a study on the influence of biologically
stabilized kraft mill effluent (SKME) on the food relations and
production of juvenile chinook salmon, Oncorhynchus tschawytscha
(Walbaum), in laboratory streams....
1969-09-03 (iso8601)
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The purpose of this study was to characterize Cytophaga
psychrophila isolates obtained from coho fingerlings with low temperature
disease collected at selected hatcheries in Oregon. In
addition, cultures thought to be related to this bacterium...
1971-08-16 (iso8601)
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Record low runs of chinook salmon to the Yukon River in the late 1990s intensified concerns about salmon bycatch by U.S. groundfish fisheries in the eastern Bering Sea and Aleutian Islands (BSAI). We estimated the bycatch of Yukon River chinook...
2012-03-19
2012-03-19 2024-04-26 |
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The collection is comprised primarily of
an early television series,
The Washington State Reporter, which was
produced by the National Bank of Commerce and aired on KING-TV (Seattle, Wash.)
from November 1951 to circa 1956. The...
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The relative resistance of the coho salmon (Oncorhynchus kisutch) and the chinook salmon (O. tshawyscha) to the parasitic larvae (glochidia) of the freshwater mussel (Margaritifera margaritifera) was studied in an attempt to determine why the coho...
1975-09-29 (iso8601)
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A study of the effects of stabilized and unstabilized kraft mill effluents on the production of chinook salmon (Oncorhynchus tshawytscha) in six laboratory streams was conducted at the Pacific Cooperative Water Pollution Laboratories, Oregon State...
1970-04-30 (iso8601)
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water availability studies. Many other streams were being adjudicated, already had instream flow protection, or were not regarded as vulnerable to development. For most of the streams requiring further study, the Department processed diversion...
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wild,154 and wild populations seemed to be careening downhill even as aggregate salmon numbers grew. Decades of expanding hatchery programs meant that fishermen had grown to expect the large harvests that hatchery fish allow. At the same time, the...
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Coho salmon smolts (Oncorhynchus kisutch) were transported at low and high densities. (12 and 120 g/L) for short and long periods (4 and 12 h). Because smolts can be transplanted directly to seawater, half of the fish in each treatment were...
1980-07-31 (iso8601)
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Much of what is recommended to benefit salmon is what has been needed for a long time and what many have known was needed. More than
50 years ago, federal biologists warned that the consequences of continuing habitat degradation and additional...
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We examined 1454 juvenile Chinook salmon, Oncorhynchus tshawytscha (Walbaum), captured in nearshore waters off the coasts of Washington and Oregon (USA) from 1999 to 2004 for infection by Renibacterium salmoninarum, Nanophyetus salmincola Chapin...
2015-04 (iso8601)
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The effects of sublethal concentrations of kraft mill effluents
(KME) on the growth, food consumption, and swimming ability of
juvenile chinook salmon, Oncorhynchus tschawytscha (Walbaum),
were studied from February 1966 to May, 1967.
The KME used...
1968-05-07 (iso8601)
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Norwegian aquaculture emerged in the end of 1960 when new discoveries transformed production from trout farming to salmon farming. During recent decades farmed salmon has been one of the most successful aquaculture species in terms of production...
2008 (iso8601)
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In July 1997 a trade agreement between Norway and the European Union went into effect. The agreement specifies
an increase in the export levy on Norwegian salmon entering the EU from 0.75% to 3.00% ad valorem. The proceeds of the
levy are to be...
2001 (iso8601)
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The primary purpose of this study is to investigate the salmon
demand of Japanese households. The specific goals are to illuminate
the substitutional relationship between salmon and other foods and to
examine seasonal and regional differences in...
1987-03-12 (iso8601)
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Report consisting of mixture of text and photographs prepared by the UW College of Fisheries; The College of Fisheries at the University of Washington was formally
established on April 2, 1919 at the urging of prominent members of the...
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THE SALMON of the Columbia River have supported an intensive fishery for
over seventy years but are now showing unmistakable signs of depletion, and
various factors are contributing to the rapid progress of this condition. Five
species of fish...
1941 (iso8601)
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Effects of the marine environment on age and size at maturity, early marine growth, and abundance of chum salmon, Oncorhynchus keta, were studied at Olsen Creek during 1959-77. Chum salmon returned to Olsen Creek as predominately 3-, 4-, and...
1979-06-26 (iso8601)
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We investigated habitat use by juvenile Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) to identify environmental characteristics that may define their optimal marine habitat. We utilized physical and biological data from...
2012-02 (iso8601)
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We, the U.S. Fish and Wildlife Service (Service), designate critical habitat for the Klamath River and Columbia River populations of bull trout {Salvelinus confluentus) pursuant to the Endangered Species Act of 1973, as amended (Act). For the...
2004-10-06
2008-08-18 2005-06-23 |
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Chinook salmon (Oncorhynchus tshawytscha) have been absent from their
historic spawning and rearing grounds in the Metolius River Basin in central Oregon
since 1968, when fish passage was terminated at the Pelton Round Butte Hydroelectric
Project...
2005-03-17 (iso8601)
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