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Emergy (spelled with an "m") and its economic equivalent emdollars evaluate the work done by the environment
and by the human economy on a common basis. Making choices that maximize emdollar contributions of environment and
economy is a useful...
2001 (iso8601)
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Chinook salmon (Oncorhynchus tshawytscha) display the greatest variability of return times to freshwater of all Pacific salmon. Differential return times to freshwater have segregated populations of Chinook into two broad types or runs, fall...
2006-07-24T15:15:44Z (iso8601)
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ambitious document, addressing not only the mitigation needs of salmon, but also proposing an institutional structure in which the Service would assume responsibility for coordinating a wide array of recovery actions.228 In substantive areas, the...
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Caption on mount: Seining for salmon. Sand Island, Columbia River, Washington
PH Coll 293.2 |
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Caption on image: Taking salmon out of pond net. Columbia River, Washington
PH Coll 293.11 |
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Tillamook Bay chum salmon are caught commercially by gill-nets, both set and drift, and from 1928 through 1949 the landings have averaged 819,689 pounds per season. More chum salmon are caught on Tillamook Bay than on the rest of the Oregon...
1953-09 (iso8601)
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Hatchery supplementation of anadromous salmon is extensive across the Pacific Northwest region with millions of juvenile salmon stocked annually. The influence of hatchery-origin fish as prey items in recipient ecosystems has been explored, but...
2012 (iso8601)
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Genetic differences between early and late forms of
Alaskan chinook salmon (Oncorhynchus tshawytscha) were
identified using two genetic approaches: mitochondrial
DNA (mtDNA) analysis and protein electrophoresis. The
study populations consisted of...
1994-02-04 (iso8601)
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A trophic model that simulates interactions between
a predatory fish (Pacific hake, Merluccius productus), forage
fish, and juvenile salmon off the Columbia River
was constructed to identify if trophic interactions could
account for marine...
2007 (iso8601)
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In this study we present
new information on seasonal variation
in absolute growth rate in length of
coho salmon (Oncorhynchus kisutch) in
the ocean off Oregon and Washington,
and relate these changes in growth
rate to concurrent changes in the...
2005 (iso8601)
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The world’s output of farmed fish has grown steadily over the past two decades or so. Most
notably in the UK, since the mid 1980’s, a rapid increase in farmed salmon production has taken
place. Given that many of the world’s oceans are overfished,...
2006-11 (iso8601)
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Salmon is an anadromous species that during its feeding and spawning migrations is sought after catch for commercial and recreational fisheries. The management of salmon fisheries is complicated by the combination of mixed and single stock...
2012 (iso8601)
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among scientists and managers than ever before. By 1995, all of the basin's recovery plans, Return to the River, and the National Research Council's Upstream report urged an adaptive approach.21
Other essential pieces of an adaptive management...
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Caption on mount: Taking salmon out of pond net. Columbia River, Washington
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The objective of this research was to study the effects of increased water temperature characteristic of clearcut watersheds of Pacific coastal streams upon the growth rate of juvenile coho salmon. The natural temperature fluctuations of the...
1971-05-10 (iso8601)
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Estimating the stock proportions of mixed-stock fishery samples by means of genetic stock identification has played an important role in the management of salmon fisheries. In addition, stock identification of individual fish has applications for...
2007-02 (iso8601)
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In the 1990s the North Pacific Fisheries Management Council and the National Marine Fisheries Service established regulations to limit the amount of Chinook and chum salmon taken as bycatch in Bering Sea trawl fisheries. The Bering Sea pollock...
2006-11 (iso8601)
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The application of DNA based markers towards the task of discriminating among alternate salmon runs has evolved in accord with ongoing genomic developments and increasingly enabled resolution of which genetic markers associate with important life...
2013-10-22 (iso8601)
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Immunity in juvenile coho salmon (Oncorhynchus kisutch) was
evaluated after immunization against vibriosis by parenteral, oral or
immersion methods. Relative levels of immunity were determined by
protection of fish from experimental water-borne...
1981-08-20 (iso8601)
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Data, pedigrees, reports and manuscripts herein are from an investigation conducted with coho salmon of the Umpqua River in southern Oregon from 2001-2009. They relate to a study investigating several areas of uncertainty about the use of salmon...
2013-05-08 (iso8601)
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The cormorant/fisherman issue is not limited to Tillamook County in
1988-1989 but is symptomatic of a widespread conflict of some fishermen
with fish-eating animals.
Predators, specifically cormorants, have been blamed for the "ruin" of
the...
1989 (iso8601)
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plants (808,000 and 518,400 kilowatts, respectively) aggregate 42 percent of the total installations in the Pacific Northwest. Transmission facilities providing regional interconnections between plants and load centers were established before...
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Throughout much of the Basin, the greatest change in land patterns came from the expansion of agriculture.' Irrigation diversions in the 19th century often blocked migrating salmon. Diversions usually lacked screens to keep juvenile fish from...
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Caption on mount: Taking salmon out of pond net. Columbia River, Washington
PH Coll 293.9 |
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We examined the potential of employing a series of lake management strategies to enhance production of endangered Snake River sockeye salmon (Oncorhynchus nerka) in its historical nursery lakes in central Idaho. We used a combination of...
1996-01-01
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