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1176 - 1200 of 2700 Items << < 43 44 45 46 47 48 49 50 51 52 > >>
1176 - 1200 of 2700 Items << < 43 44 45 46 47 48 49 50 51 52 > >>
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Renibacterium salmoninarum produces bacterial kidney
disease (BKD) in salmonid fish. Soluble antigen(s) (SA) produced
by the bacterium was characterized by physicochemical,
functional and immunological methods. The molecular weight
determination...
1989-09-15 (iso8601)
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This paper analyses what are the potential outlets on European markets for new farmed fish. In the first part, the main striking features about the structure and evolution of the European fish trade over the last decade are presented. The...
2008 (iso8601)
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Hatchery-reared salmonid fish routinely encounter stress due to
handling, barging, tagging, and overcrowding. It has been demonstrated that
there exists a direct correlation between stress and transient immune
suppression which can last for many...
1992-08-11 (iso8601)
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1970-08-06 (iso8601)
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Anadromous fish populations in the Pacific Northwest have
undergone substantial change throughout the past century.
Historical periods of over-harvest and the construction of
numerous dams throughout the region have contributed to declines
in the...
1986-08-25 (iso8601)
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The myxozoan parasite of salmonids, Ceratomyxa shasta, is established throughout the Klamath River, CA-OR, with high parasite densities below the series of dams and above the dams (upper basin) in the northernmost tributary, the Williamson River...
2010-12-30 (iso8601)
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Severe scouring from splash damming was one of the earliest reported forms of widespread anthropogenic disturbance in streams of the Pacific Northwest, USA. Splash damming was a common method of log transport in western Oregon from the 1880s...
2010-10-26 (iso8601)
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Much of the research on social carrying capacity in
recreation settings has focused on backcountry or
primitive areas where recreationists' perceptions of
social contact are a critical element of a quality
experience. A challenge now facing...
1989-03-06 (iso8601)
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Tentative Source Disposition
SI-73, 75 F F-17
SI-70 F F-17
Problem or Area of Concern
18. (Cont) COMMENT: (for 13. and 16-18): Fish and wildlife agencies have long recognized the potential of the Willamette Basin for producing salmon. A...
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Significant Wildlife Habitats
Existing Regulation
crucially important. The Columbia River is classified as a riverine wetland below Bonneville Dam, and a lacustrine wetland above the dam.
Wildlife and fish habitats were examined by...
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CHAPTER I
Character and Purpose of the Report OUTLINE FOR RESOURCE DEVELOPMENT A broad plan for the most beneficial use of water and other physical resources of the Columbia River Basin Within the United States is outlined in this... |
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scientifically credible ecosystem recovery program may be a precondition to the new agreements on the river. If the cost of an ecosystem program goes beyond the financial limits of hydropower, it would be particularly logical to spread the...
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Managing ecosystems for experimental purposes. Adaptive management seemed to assume that problems in the Columbia River would lend themselves to laboratory-style testing in which some variables could be controlled, others manipulated, and changes...
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by watershed.41 The 1993 plan for the Middle Snake noted that the State Water Plan specifies zero flows at Milner, but committed to work for higher flow levels to "improve some aspects of water quality and fish habitat, and restore some of the...
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I feel even though we have been moved from one part of the Columbia River to another part, we had some happiness and we knew that we could live because we had a food supply. When 'progress' came and the dams were built, progress did not come to...
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Pocketing fish in seine preparatory to loading fish in skiff at the Van Dusen Sands near Astoria
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Frey and Bryant taking shower at warm springs just above box canyon
1941-06-25
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Master scanned with Epson 1640XL at 800 dpi. Image manipulated with Adobe Photoshop 7.0.
1935-09-08
2003-01-01 |
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Large beaver dam and house about 1 1/2 miles above the Loon Creek Ranger Station
1941-06-20
2003-01-01 |
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Camp site on Indian Creek, Idaho
Good fishing but hard to get in and out
1941-07-13
2003-01-01 |
