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301 - 325 of 2700 Items << < 8 9 10 11 12 13 14 15 16 17 > >>
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Abstract "Seeking Refuge" examines the history of migratory waterfowl management along the Pacific Flyway, the westernmost of four main migration routes in North America. Drawing on approaches from historical geography and environmental history,...
2024-05-03
2005-01-03 2004-11-30 |
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Bycatch is repeatedly noted as a primary problem of fisheries management
and as the foremost negative impact of commercial fishing. In the Bering
Sea pollock fishery, salmon bycatch reduction measures have included gear
modifications but have...
2010 (iso8601)
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The paper is the first attempt to explore the ecological and economic impacts of genetic interaction between farmed and wild salmon over generations. An age- and stage-structured bioeconomic model is developed. The biological part of the model...
2010 (iso8601)
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The genetic basis of adaptation is complex as many fitness-related traits are quantitative and likely influenced by multiple genes with variable effects across different selective environments. One important adaptation for anadromous Chinook...
2007-11-29T16:00:47Z (iso8601)
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river reservoirs below the storage projects. The logic of the drawdown strategy was this: Assume the problem for Snake River salmon is the mainstem federal dams, which themselves slow the flow of water by backing the river up into broad, deep and...
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The arduous task of finding a solution to the enduring salmon crisis calls for
a non-trivial, comprehensive approach. Such a solution is likely to affect virtually
everyone in the Pacific Northwest. Ensuring public understanding of and support
for...
2003-11-26 (iso8601)
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Interest in the distribution of Clostridium botulinum type E
was heightened by the sudden outbreak of human botulism from
smoked whitefish chubs and canned tuna fish in 1963. The question
arose as to how widely the organism is distributed among...
1969-08-07 (iso8601)
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In rodent models as well as in fish models there are significant
species differences in the susceptibility toward aflatoxin B₁ (AFB₁)
carcinogenesis. Mouse is less susceptible toward AFB₁ carcinogenesis
than rat. Researchers have come to the...
1985-10-24 (iso8601)
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This thesis addresses the costs of implementation of the Endangered Species Act (ESA)
in the particular case of Snake River chinook salmon. Unlike most previous listings under
the act, restoration of Snake River salmon will have impacts on a very...
1996-02-07 (iso8601)
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Environmental shifts accompanying salmon spawning migrations from ocean feeding grounds to natal freshwater streams can be severe, with the underlying stress often cited as a cause of increased mortality. Here, a salmonid microarray was used to...
2011-10-18
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K. D. Swan was the first photographer
for the U.S. Forest Service's Northern Region Headquarters in Missoula,
Montana. This collection represents his non-professional interests in outdoor
recreation and travel and does not contain many...
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Adult Chinook salmon (Oncorhynchus tshawytscha) migrate from salt water to freshwater streams to spawn. Immune responses in migrating adult salmon are thought to diminish in the run up to spawning, though the exact mechanisms for diminished immune...
2016-01 (iso8601)
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Early life stages of many marine and diadromous fish species use sandy beach surf zones, which occur along >50% of the world's marine coastlines. This extensive habitat can provide juvenile fishes with an abundant supply of potential prey and the...
2012-10-05 (iso8601)
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This study examined the distribution and behavior of adult spring chinook salmon
(Oncorhynchus tshawytscha) related to patterns of stream temperature and physical
habitat at channel unit, reach, and basin-wide spatial scales in both a wilderness...
1996-07-08 (iso8601)
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From 1998-2000, laboratory studies were conducted to examine factors
that impact saltwater-entry behavior and saltwater preference (SWP) of juvenile
chinook salmon, Oncorhynchus tshawytscha. These factors included bacterial
kidney disease, stress...
2002-04-09 (iso8601)
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Criteria for the design and construction of a prototype streamside
incubator for Pacific salmon (Oncorhynchus) eggs and alevins
are described. Operation of the prototype and methods of transporting
freshly spawned salmon eggs from distant sources...
1969-12-11 (iso8601)
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Tidal marshlands in the upper estuary ecotone provide essential habitat for
juvenile salmonids. In this environment, salmonids grow rapidly and acclimate to
saltwater. Worldwide, tidal marshes have been diked and drained to provide
agricultural...
2010-08-06T18:09:40Z (iso8601)
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Salmon aquaculture generates good output (i.e. salmon) and bad output (e.g., pollution). A joint production function approach is applied to model both outputs simultaneously. Two environmental production
technologies are proposed, namely,...
2008 (iso8601)
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The Pacific salmon market may often be characterized by
disequilibrium conditions and less than perfect information. Thus the
study of the decision-making behavior, especially short-run pricing,
of wholesale market participants in this industry...
1983-09-16 (iso8601)
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The Independent Multidisciplinary Science Team (IMST) was directed to evaluate the extent of predatory impacts of marine mammals and seabirds on salmonids and to recommend actions to mitigate impacts. IMST focused on the Oregon Department of...
1998-12-22 (iso8601)
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In 1995, Oregon introduced the Oregon Plan for Salmon and Watersheds (formerly the
Oregon Coho Salmon Recovery Initiative; OCRSI), a statewide cooperative effort between government and citizens. The Oregon Plan promotes voluntary and locally...
2003-10-20 (iso8601)
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The Umpqua National Forest (UNF) submitted June 3, 1999, January 14, 2000, and April 14, 2000 letters requesting consultation for a number of proposed activities that were determined likely to adversely affect Oregon Coast (OC) coho salmon...
2000-10-16 (iso8601)
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Rivers. These soils are dark colored, neutral to slightly acid in reactions, and fertile. They are intensively utilized for specialty farming, particularly the production of orchard fruits.
Small areas of alluvial soils are found along the...
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"equitable apportionment" principles of interstate water law.68 The court agreed that equitable apportionment applies to salmon in principle: "At the root of the [equitable apportionment] doctrine is the same principle that animates many of the...
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The recent Endangered Species Act (ESA) listing for Puget Sound chinook salmon (Oncorhynchus tshawytscha) highlights both the conflicts and the potential to restore estuarine ecosystems of juvenile salmon in Commencement Bay. In order to restore...
2008-11-05
2008-11-05 2024-05-03 |
