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726 - 750 of 1229 Items << < 25 26 27 28 29 30 31 32 33 34 > >>
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The present study has consisted primarily of an investigation
of the rates of isotopic sulfur exchange between sulfur dioxide and
various sulfur (VI) solutions, both 100% H₂SO₄ and, in particular,
related ammonia-containing sulfur (VI) solutions....
1965-03-19 (iso8601)
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Spatial coherence between predators and prey has rarely been observed in pelagic marine ecosystems. We used measures of the environment, prey abundance, prey quality, and prey distribution to explain the observed distributions of three...
2013-01-03 (iso8601)
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A gas phase kinetic model for the CF₄/O₂ microwave discharge plasma and afterglow of our laboratory has been developed. A reaction pathway identifying the major chemical reactions is proposed. The rate coefficients of the electron impact...
1997-12-05 (iso8601)
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At the beginning of the nineteenth century most
theorizing British naturalists supported a Biblical
account of the distribution of life which was based
upon the notion that life had been dispersed from the
resting place of the ark. This implied a...
1974-05-06 (iso8601)
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In a recent survey, it was observed that many woody plant species grown in Pacific Northwest nurseries exhibited disease symptoms typical of a bacterial infection and Pseudomonas syringae was commonly isolated from these tissues. The distribution...
1986-04-11 (iso8601)
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The known biology of Bareogonalos canadensis
(Harrington) is based on literature records of six
collections from three areas in the Pacific Northwest.
The objective of this study was to obtain fundamental
knowledge on the biology of B. canadensis,...
1988-10-11 (iso8601)
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Russia is experiencing deep structural changes in many areas. For the seafood industry important developments are large increases in household incomes, development of modern super- and hypermarket distribution channels, and product innovations. In...
2008 (iso8601)
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This research was conducted in the Mamora cork oak
forest of Morocco to: (1) Describe the impacts of sheep
grazing (none, 35% use, 70% use) in March, April, May and
June of 1987 and 1988 on seasonal forage production; (2)
evaluate the effects of...
1991-10-03 (iso8601)
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Recovery of imperiled fishes can be achieved through suppression of invasives, but outcomes may vary with environmental conditions. We studied the response of imperiled desert fishes to an invasive brown (Salmo trutta) and rainbow trout...
2020-06-03
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1. Distribution: A general map of distribution is given in the introduction, showing the range of the genus as a whole. A second, composite map, provides collection localities for the three species studied. Other maps indicate sites of collection...
1965-12-14 (iso8601)
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The global human population is expected to reach 9.8 billion by 2050 and an increase in food yield will be needed to provide for the future generations. Insects are among the biggest threats to food production and are therefore the subject of...
2020-05-01
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The California brown pelican (Pelecanus occidentalis californicus) is listed as an
endangered species under the U.S. Endangered Species Act. The Recovery Plan for
this subspecies outlines the need to "Assure long-term protection of adequate food...
2004-09-15 (iso8601)
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This is a ms for the Molecular Ecology Special Issue 'Epigenetic Studies in Ecology and Evolution'. Link to publisher's version: http://onlinelibrary.wiley.com/doi/10.1111/mec.13414/full
2015-11-20
2015-11-20 2015-10-01 |
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The Fish and Wildlife Service (Service) provides notice that a public hearing will be held on the proposed determination of critical habitat for Lost River sucker (Deltistes luxatus) and shortnose sucker (Chasmistes brevirostris). In addition, the...
1995-01-31
2008-08-19 2005-06-21 |
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A survey of the methods of purification of KC1, for use in
preparing single crystals by growth from the melt, was made. Two
methods, fractional recrystallization and ion exchange, were used.
The purity of the salt and crystals grown from the same...
1965-09-03 (iso8601)
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We determined the incidence of pathogens and insects across mixed-conifer stands in the Sierra San Pedro
Martir (SSPM) of northern Baja, Mexico, to assess the role of pests in a pristine forest ecosystem. We also determined
the spatial...
2002 (iso8601)
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Aseries of dams on the Deschutes River, Oregon, act as migration barriers that segregate the river system into upper
and lower basins. Proposed fish passage between basins would reunite populations of native potamodromous fish and
allow anadromous...
2012-11-12 (iso8601)
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A 1½-yr survey of planktonic fish larvae collected from 2 to 111 km off the mid-Oregon coast in
1971-72 yielded 287 samples which contained 23,578 individuals in 90 taxonomic groups, 78 identified
at the species level.
Two distinct faunal...
1977 (iso8601)
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Moose (Alces alces gigas) were introduced to the copper River Delta with a series of translocations of 23 calves from 1949-58. The population grew rapidly and a hunting season was initiated in 1960. The great earthquake of 1964 uplifted the delta...
1992 (iso8601)
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Multiple analytical techniques were used to evaluate the impact of multiple parasite species on
the mortality of threatened juvenile coho salmon (Oncorhynchus kisutch) from the West Fork Smith
River, Oregon, USA. We also proposed a novel...
2011 (iso8601)
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Citizen Science is a paradigm in which volunteers from the general public participate in scientific studies, often by performing data collection. This paradigm is especially useful if the scope of the study is too broad to be performed by a...
2013-12-03 (iso8601)
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