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401 - 425 of 2700 Items << < 12 13 14 15 16 17 18 19 20 21 > >>
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The ex-vessel coho salmon market has been paid scant attention
in the study of the salmon resources. This study is an attempt to
advance an understanding of the variations of ex-vessel prices and
landings during the coho season as well as between...
1978-11-17 (iso8601)
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Diseases caused by parasites are recognized as significant sources of mortality in wild fish populations. I assessed the impacts of multispecies parasitism on a threatened stock of juvenile coho salmon (Oncorhynchus kisutch). A crucial...
2011-01-04 (iso8601)
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The myxozoan parasite, Ceratomyxa shasta, is the most significant pathogen of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Klamath River, CA, USA. This parasite requires two hosts - a freshwater polychaete (Manayunkia speciosa) and a...
2009-11-24 (iso8601)
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Creek was built to provide game fish for Lake Roosevelt and increased funding of this facility should be considered.
Section 8C, Item 6. Transporting Juvenile Salmon
The transportation concept is presently under study by the National...
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CHAPTER XII
Fish and Wildlife Basin-wide aspects of fish and wildlife resources are considered in this chapter. The local significance of these, resources has been noted in connection with the basin's major subdivisions. The discussion of... |
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by clay and commonly known as "alkali" depressions which are contained within these lands, however, materially impair their agricultural value. In other localities the lands are quite rolling, and the soils are light-brown, gravelly loams of...
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ecosystem information. For example, the National Marine Fisheries Service, a Department of Commerce agency, is developing a new framework for describing and identifying essential fish habitat under the Magnuson-Stevens Fishery Conservation Act.30...
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development of the rivers, the laws and institutions that accompanied water development, the effects on salmon, and efforts to remedy the salmon losses. This survey leads to several observations:
First, 150 years of water development have...
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know the salmon to have to the taste of the water in which men and animals and especially salmon have been washed to superstition. They did (not) begin spearing till near noon, as the spearer had seen the bearer of a deaths head boy since dead; to...
2004-07-04
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We tested the hypothesis that spawning-bed enhancement increases survival and growth of chinook salmon (Oncorhynchus tshawytscha) embryos in a regulated California stream with a gravel deficit. We also examined how 12 physical parameters...
2004-01-01
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Between the 1970s and late 1990s, Summer Chum salmon abundance in the Hood Canal basin declined significantly to the point the population was listed as “threatened” under the Endangered Species Act (1999), with multiple subpopulations extirpated....
2018-05-01
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Snake River sockeye salmon Oncorhynchus nerka, listed under U.S. law as endangered in 1991 in response to a decline in anadromous adult numbers, spend their first 1–2 years in Redfish Lake, Idaho, before migrating to the sea. To determine how...
1998-01-01
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Part I. To aid in the management of the Tillamook Bay commercial salmon fishery, a tagging program was conducted on the salmon and steelhead trout runs in 1953. General migration behavior, the minimum length of time the fish remained in the...
1964 (iso8601)
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Environmental factors such as chemical contamination can have
immunomodulatory effects on the immune response of fish and may be contributing to
the decline in salmonid populations by augmenting disease susceptibility. Xenobiotics
can interfere...
2001-08-23 (iso8601)
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Removing the eggs from female blueback salmon that has just been killed at the Leavenworth hatchery.
1942-09-18
2024-05-17 |
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The movement of Chinook salmon through space and time, across political boundaries, and through fisheries, creates one of the most complex marine resource management problems in the world. Information garnered from the recovery of coded-wire tags...
2015-06-23 (iso8601)
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Wild fish populations are typically infected with a variety of micro- and macroparasites that may affect fitness and survival, however, there is little published information on parasite distribution in wild juvenile salmonids in three upper...
2014-12-09 (iso8601)
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The presence of the etiologic agent of "salmon poisoning"
disease, Neorickettsia helminthoeca, was demonstrated in eggs of
the trematode vector, Nanophyetus salmincola. Three dogs were
given 100,000 and one dog 82,000 ground fluke eggs by...
1967-11-22 (iso8601)
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Biological studies were conducted on a histozoic myxosporidan
Myxobolus insidiosus (Wyatt and Pratt, 1963) from the musculature of
Oncorhynchus tshawytscha (Walbaum). This organism is known to
occur in spring chinook salmon in Oregon and coho...
1971-05-28 (iso8601)
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The formulation of demand functions for aquatic products has been prevalently practiced worldwide, but
still represents a rather new phenomenon in the area of applied economics in Vietnam. This paper focuses
on estimates of demand functions for...
2008 (iso8601)
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Epidemiological studies have suggested that the consumption
of fish may reduce the risk of cardiovascular disease.
Compared to the number of studies using fish oils, few
studies have used fish itself. Those which have used fish
have generally used...
1992-12-08 (iso8601)
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The main objective of this study was to estimate the demand for
and value of Oregon ocean sport-caught salmon fishery. The primary
technique employed to estimate the recreational demand was an
aggregated zone average travel cost method (TCM).
The...
1988-11-30 (iso8601)
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Using water-permit processes to protect salmon. The states' primary responses to the Council's request that water permit processes be used to protect salmon was to enact various forms of moratoria on new water diversions.179 Idaho imposed a...
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3. Cumulative Impacts
All of these developments have fragmented the Columbia River salmon's habitat and destroyed connections among local populations. Scientists theorize that connections among salmon habitats and populations is important in...
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