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1176 - 1200 of 1229 Items << < 43 44 45 46 47 48 49 50 > >>
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We previously developed a spatially explicit, individual-based model (IBM) evaluating the bio-economic efficiency of fishing vessel movements between regions according to the catching and targeting of different species based on the most recent...
2012 (iso8601)
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Invasive plant species are expanding and transforming vegetative communities across Oregon and throughout the United States. Over the past three decades remote sensing, geographic information system (GIS), and Global Positioning System (GPS)...
2011-06-09 (iso8601)
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ill., maps; Report title; Includes appendices: Crater Lake Liminological Studies 1984 and 1985; Includes bibliographical references; "Robert E. Benton, Superintendent Crater Lake National Park." - T.p.
1986-05-21
2008-08-19 2008-11-26 |
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Bumble bees (Hymenoptera: Apidae) are important native pollinators in wild
and agricultural systems, and are one of the few groups of native bees commercially
bred for use in the pollination of a range of crops. In recent years, declines in...
2014-03-26 (iso8601)
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In wood-based composites, the glue-line (interface) between wood-strands affects the stress transfer from one member to the next. The glue-line properties determine the rate of load transfer between phases and these properties depend on wood...
2010-05-14 (iso8601)
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Llamas (Lama glama) appear to have predisposing anatomical features for developing
otitis media such as a long and narrow external acoustic meatus and a trabecular
tympanic bulla. However, there is limited information available about the...
2010-03-30T15:29:49Z (iso8601)
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The family Bibionidae has a worldwide distribution and includes
approximately 700 species in eight extant genera. Recent studies have not produced
compelling evidence supporting Bibionidae as a monophyletic group or identified the
sister group to...
2004-06-03 (iso8601)
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The structure and transcriptional activity of intranuclear
and isolated chromatin from logarithmically growing
yeast cells has been compared to chromatin from cells which
have entered the stationary phase and ceased growing. Both
chromatins show a...
1980-10-02 (iso8601)
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This study examined the abundance, size, growth, and age of advance regeneration
Douglas-fir, beneath an eighty year-old overstory at a single site on plots subjected to different overstory thinning treatments. Treatments consisted of keeping...
1998-06-03 (iso8601)
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Two North American subspecies of Snowy Plovers (Charadrius alexandrinus) have been
described: the Cuban Snowy Plover (C. a. tenuirostris) and the Western Snowy Plover
(C. a. nivosus). Coastal populations of the Western Snowy Plover are listed as...
2000-06-06 (iso8601)
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The contribution of rare taxa to bioassessments based on multispecies assemblages is the subject of continued debate. As a result, users of predictive models such as River InVertebrate Prediction and Classification System (RIVPACS) disagree on...
2007-01-01
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Sampling techniques were evaluated to quantify immature mint flea
beetle (MFB), Longitrsus waterhousei Kutschera (Coleoptera: Chrysomelidae),
on peppermint (Mentha piperita L.), in central Oregon. During the study
period, 1985-1988, soil samples...
1989-03-07 (iso8601)
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Western forests have become increasingly fragmented landscapes dominated
by young stands. Given that western Oregon forests largely consist of headwater
systems, there is a need to better understand how headwater forest taxa and their
habitats are...
2007-07-12T22:00:41Z (iso8601)
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Bear lake sculpin Cottus extensus exhibit ontogenetic habitat shifts during their initial year of life. Distribution and habitat switching was measured with bimonthly bottom-trawl surveys repeated throughout the summer. Patterns of daily growth...
1999-01-01
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The Pseudophyllidean tapeworm, Schistocephalus solidus, is a parasite that
requires both copepods and fish, mainly the threespine stickleback (Gasterosteus
aculeatus) as intermediate hosts, and birds as its final host to complete its life cycle....
2004-04-19 (iso8601)
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Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater containing high levels of salts and other minerals from farmland in the San Joaquin Valley of California. Aquatic plants and invertebrates were sampled at Kesterson in...
1987-04-15 (iso8601)
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Behavioral responses of juvenile bluefish P. saltatrix L. exposed to cold water in a vertical thermal gradient were measured under controlled laboratory conditions. The temperature regime was similar to conditions that these fish encounter in...
1985-05-16 (iso8601)
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Phytoplankton samples were collected in Lake Mend 6 times from September 1910 to June 1971 for 8 stations at depths of 0. 3, 5, 10, 20, and 30 m. These samples were processed through a Millipore filter apparatus and 79 planktonic algae were...
1974-01-01
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The catastrophic eruption of Mt. St. Helens in southwestern Washington on May 18, 1980 deposited a plume of volcanic ash from Washington to western Montana. Ash deposits in northern Idaho were significant with depths varying from 2 to 3 mm in the...
1983-10-01
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The 20-year US GLOBEC (Global Ocean Ecosystem Dynamics)
program examined zooplankton populations and their predators in four coastal
marine ecosystems. Program scientists learned that environmental controls on
zooplankton vital rates, especially...
2013-12 (iso8601)
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While the focus of Lake Victoria Nile-perch fishery is to serve the global market and tilapia is mainly for
domestic market in Tanzania; Dagaa has a great potential for small scale trade in regional markets. In
2006 a survey was conducted to...
2012 (iso8601)
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