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26 - 50 of 141 Items << < 1 2 3 4 5 6 > >>
26 - 50 of 141 Items << < 1 2 3 4 5 6 > >>
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Lake Mead has undergone a serious decline since Glen Canyon Dam was constructed 450 km upstream in 1963.
State fisheries management agencies are concerned that the decline was caused by water level fluctuations and more severe drawdowns during the...
1981-06-01
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Razorback suckers (Xyrauchen texanus) and bonytail chubs (Gila elegans) were once widespread throughout the Colorado River system. The ranges and populations of these native species and others have declined in the past 50 years. Bonytail chubs...
1984-01-01
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Food and energy transformation in an aquatic system must be understood in order to develop a simulation approach. This report provides a comprehensive study of an aquatic ecosystem. The objectives of this report are to show:
(1) the biological...
1971-04-08
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Echograms have been used extensively to locate and estimate the relative abundance of marine fish stocks (Cushing 1973). In freshwater, echograms have been used to describe vertical (Netsch et al. 1971; Eggers 1978; O'Brien et al. 1984; Matthews...
1989-01-01
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A pumped storage system consists of an upper reservoir and lower reservoir separated by an elevation difference. During low demand energy periods such as nights and weekends water is pumped from the lower to the upper reservoir using available...
1988-06-01
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The Bond Papers document the fisheries
research conducted by OSU Fisheries and Wildlife Professor Carl E.
Bond.; Biographical Note:; Alumnus and ichthyologist Carl Bond received B.S. and M.S. degrees from
Oregon State College in 1947...
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ill.; Includes bibliographic references (p. 144-155); Cooperative Agreement CA-9000-3-0003 Subagreement 12; CPSU/OSU 88-3.
1988-05-05
2009-03-20 2009-04-27 |
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Eminent contributors present articles which evaluate the causes, consequences and reversibility of freshwater acidification--past, present and future.
1994-01-01
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Spawning of razorback suckers, Xyrauchen texanus, in Lake Mohave occurred from 10-22° C and larvae were collected at water temperatures from 10-15° C in 1982 and 1983. In the laboratory, hatching success was similar from 12-20° C, but reduced...
1990-01-01
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Microfaunal communities were studied in littoral (inshore) and limnetic (offshore) areas of the lower basin in Lake Mead to compare species composition and abundance between the two zones. Planktonic forms (zooplankton) dominated inshore and...
1987-05-01
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Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of a larger, game...
1989-06-01
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Echograms have been used extensively to locate and estimate the relative abundance of marine fish stocks (Cushing 1973). In freshwater, echograms have been used to describe vertical (Netsch et al. 1971; Eggers 1978; O'Brien et al. 1984; Matthews...
1989-01-01
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Water resources managers and conservation biologists need reliable, quantitative, and directly comparable methods for assessing the biological integrity of the world's aquatic ecosystems. Large-scale assessments are constrained by the lack of...
2006-01-01
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It is widely recognized that suspended and dissolved solids in lakes, rivers, streams, and reservoirs affect water quality. In this report the research needs appropriate to setting freshwater quality criteria or standards for suspeneded solids...
1977-04-01
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Lake Mead was impounded in 1935 by the construction of Hoover Dam. The Colorado River was unregulated prior to then and therefore was subjected to extreme variations in flows and suspended sediment loads. Hoover Dam stabilized flows and reduced...
1983-01-01
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Records
documenting the administration and research projects of the Applied Fisheries
Laboratory, the Laboratory of Radiation Biology, and the Laboratory of
Radiation Ecology at the University of Washington.; The Applied Fisheries...
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ill.; Typescript (photocopy); Thesis (M.S.)--Oregon State University, 1988; Includes bibliographical references (leaves 144-155)
1988-05-05
2009-07-10 2009-11-02 |
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The Bond Papers document the fisheries
research conducted by OSU Fisheries and Wildlife Professor Carl E.
Bond.; Biographical Note:; Alumnus and ichthyologist Carl Bond received B.S. and M.S. degrees from
Oregon State College in 1947...
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Cover is an important component of aquatic habitat and fisheries management. Fisheries biologists often try to improve habitats through the addition of natural and artificial material to improve cover diversity and complexity. Habitat-improvement...
1994-01-01
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Studies conducted by the University of Nevada-Las Vegas (UNLV), the Nevada Department of Wildlife (NDOW), the Arizona Game and Fish Department (AGFD), The Nevada Division of Environmental Protection (NDEP), and the United States Bureau of...
1987-11-01
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This manual contains detailed descriptions of biological, chemical and physical sampling and analytical procedures used at the Lake Mead Limnological Research Center. The manual was prepared in response to requests made by numerous individuals...
1980-12-01
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Analysis of historical nutrient data for Lake Mead indicates that the fertility of the reservoir has decreased which may be the cause for a corresponding decline in the largemouth bass population. However, it appears that fertility can be...
1979-01-01
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This report fulfills the request of the Colorado River Basin Project, Denver, Colorado, to determine the effects of municipal and industrial wastes on the aquatic life in selected waters of the Colorado River Basin. These studies were conducted...
1968-10-01
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