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651 - 675 of 1229 Items << < 22 23 24 25 26 27 28 29 30 31 > >>
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Background: MicroRNAs (miRNAs) are noncoding RNAs that direct post-transcriptional regulation of protein coding genes. Recent studies have shown miRNAs are important for controlling many biological processes, including nervous system development,...
2012-11-23 (iso8601)
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During the six-month period of July through December, 1966,
a study of animals inhabiting laminarian holdfasts in Yaquina Bay,
Oregon, was carried out to determine what animals live in this habitat
and to gain some idea of the factors which...
1967-05-11 (iso8601)
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Partly laminated sediments on the upper continental
slope (200-600 m) off central Peru contain a diverse assemblage
of fish debris, diatoms, and the remains of a variety
of other nektonic, planktic, and benthic organisms. Approximately
97 percent...
1979-07-27 (iso8601)
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Riparian forests in the Idaho Panhandle, north of Whitebird, were surveyed for
rare riparian lichen species. The region was stratified into nine geographic units and
by stream size. Eighty-one plots were surveyed for lichen community, stand and...
2001-06-01 (iso8601)
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A Professional Project report submitted in partial fulfillment of the requirements for the degree of Master of Water Resources, Water Resources Program, University of New Mexico.
2013-08-01
2013-08-01 2013-08-01 |
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By 1992, the Canadian cod populations collapsed and
a moratorium on fishing was declared, which
remains in place until today. Ecologists suspect that the marine ecosystem at the Canadian east coast
has
shifted towards a new regime, where cod...
2012 (iso8601)
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Gill nets set at three depths at an open-water station in Lake Titicaca during August 1984 captured only two species of endemic killifishes (Orestias ispi and o. mulleri) and an exotic silverside (Basilichthyes bonariensis). These species...
1988-01-01
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Gill nets set at three depths at an open-water station in Lake Titicaca during August 1984 captured only two species of endemic killifishes (Orestias ispi and o. mulleri) and an exotic silverside (Basilichthyes bonariensis). These species...
1988-01-01
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The cultivated strawberry is one of the youngest domesticated plants, developed in France in the 1700s from chance hybridization between two western hemisphere octoploid species. However, little is known about the evolution of the species that...
2013-01 (iso8601)
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The study was carried out in Anyigba metropolis in central Nigeria to analyse the distribution, marketing and consumption of frozen fish. Twenty (20) retailers and 60 consumers were randomly selected for questionnaire administration. Descriptive...
2012 (iso8601)
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Expanding groundfish production on the West Coast and in the
United States in total, over the past decade, has increased
competition in the groundfish market. During the same period,
regulations have evolved to control production in the...
1983-12-07 (iso8601)
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Pacific sardine (Sardinops sagax) in the California Current Ecosystem (CCE) has exhibited extreme sensitivity in its abundance and distribution in the face of decadal-scale climate regime changes. Warm regimes enhance the abundance of Pacific...
2012 (iso8601)
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An exotic pest of deciduous plants, Operophtera
brumata (L.), was discovered in Portland, Oregon in
1978. O. brumata, the winter moth, is native to
northern Africa and temperate Eurasia. Its range
extends from Scandanavia, Britain, and France to...
1985-04-19 (iso8601)
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Overstory species influence the distribution and dynamics of nutrients in forest ecosystems. Ecosystem-level estimates of Ca, Mg, and K pools and cycles in 50-year old Douglas-fir and red alder stands were used to determine the effect of overstory...
1992-01-01
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Vegetation type, extent, continuity, and structure are some of the most important factors that determine wildlife diversity and distribution. Other contributing factors that shape wildlife communities include disturbance, competition, climate, and...
2007-09-01
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Vegetation type, extent, continuity, and structure are some of the most important factors that determine wildlife diversity and distribution. Other contributing factors that shape wildlife communities include disturbance, competition, climate, and...
2007-09-01
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Phytophthora lateralis is the causal agent of cedar root rot, a fatal forest pathogen whose principal host is Chamaecyparis lawsoniana (Port-Orford-cedar), a predominantly riparian-restricted endemic tree species of ecological, economical, and...
2011-09-01 (iso8601)
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The fishes of Upper Klamath Lake appeared to distribute
themselves in three general groups during the summers of 1964
and 1965: (1) the chubs--unrestricted as to distribution with slight
seasonal variations; (2) rainbow trout and yellow perch --...
1968-04-29 (iso8601)
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Montane forest vegetation as it occurs on the east flank of the
central Oregon Cascades has provided excellent conditions for a
"natural experiment" in the use of various methodologies in studying
vegetational distribution. This "experiment" has...
1964-06-10 (iso8601)
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Pacific sardine (Sardinops sagax) in the California Current Ecosystem (CCE) has exhibited extreme sensitivity in its abundance and distribution in the face of decadal-scale climate regime changes. Warm regimes enhance the abundance of Pacific...
2012 (iso8601)
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Biological introductions may considerably alter the composition and community dynamics of invaded areas thereby changing many ecosystem processes including productivity, decomposition, nutrient cycling and hydrology. The effects on native species...
2007-05-31T16:17:09Z (iso8601)
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Background: The uneven distribution of recombination across the length of chromosomes results in inaccurate estimates of genetic to physical distances. In wheat (Triticum aestivum L.) chromosome 3B, it has been estimated that 90% of the cross over...
2012-07-24 (iso8601)
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The subcellular fractions of liver and kidney from three bearded
seals (Erignathus barbatus nauticus) and three walrus (Odobenus
rosmarus divergens) were analyzed for cadmium and mercury content,
and the results were compared with the results of...
1975-11-17 (iso8601)
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New approaches are needed to quantify and understand spatial patterns of stream fishes and their environment. Concepts in riverine ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat and biota,...
2002-02-25 (iso8601)
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This study compared effects of human and natural wildfire disturbance on age class distribution and associated ecosystem properties of forests in a 15,670 km2 area of the western Cascades of Oregon. The study site is characterized by three forest...
2002-04-01 (iso8601)
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