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101 - 125 of 141 Items << < 1 2 3 4 5 6 > >>
101 - 125 of 141 Items << < 1 2 3 4 5 6 > >>
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Knowledge of current and historical conditions is needed to guide conservation and restoration policies, but such information is lacking for most taxa. This problem is especially severe for small, inconspicuous taxa, such as the thousands of...
2016-12-01
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Freshwater mussels are the most threatened taxonomic group in North America with extinction rates that exceed those of many species found in both terrestrial and freshwater ecosystems including fish, birds, and amphibians. Part of the reason that...
2012-05-01
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Red swamp crayfish (Procambarus clarkii) were trapped in Flamingo Wash, an urban wash of Las Vegas, during four periods of 1988. Life history and reproductive success were determined. The trapped crayfish were marked and released into a study cove...
1989-03-01
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Las Vegas Bay and Echo Bay in Lake Mead have small, self-sustaining populations of razorback sucker (Xyrauchen texanus [Abbot]). Increased productivity and cover have been hypothesized as reasons for successful recruitment of razorback sucker in...
2002-07-01
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The temporal and spatial changes in chemical and biological properties of Lake Mead have been investigated, thereby indicating the sources of water pollution and the time of highest pollution potential. Planktonic organisms have been shown to...
1972-09-01
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This study developed from observations made during an earlier study on Lake Mead which was reported in CHE-70, Water Quality Study of Lake Mead. Results from that study indicated that poor-quality water was flowing into the Las Vegas Bay reach of...
1971-01-01
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Kaelepulu Pond is an inland brackish water pond (20 ppt salinity) which is under tidal influence and is fed by rainfall. Water from this pond flows via canals and streams (Kaelepulu Stream) for approximately 2 miles through a residential community...
2014-12-12
2014-12-12 1993-10-01 |
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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.
2008-12-04
2008-12-04 2008-12-04 |
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1. Vertical transport of nutrients in sedimenting faecal material is greatly reduced by coprophageous organisms. Unfortunately, nearly all work on faecal production, sedimentation and coprophagy has dealt with copepods in marine ecosystems. Here,...
2004-01-01
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To fulfill the mandate of Senate Bill 137 (1975), a comprehensive study of the effects of freshwater inflow upon the bays and estuaries of Texas (here, the Trinity-San Jacinto estuary).
1981-04-01
2008-11-18 2008-11-18 1981-04-01 2008-11-18 |
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This publication offers an in-depth study of the fish and other organisms that live in Lakes Mead and Mohave. The history and background of the two lakes is offered, as well as information about diseases, parasites, and unusual fish occurrences....
1978-01-01
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Fifty years ago, riparian habitats were not recognized for their extensive and critical contributions to wildlife and the ecosystem function of watersheds. This changed as riparian values were identified and documented, and the science of riparian...
2018-11-01
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This paper summarizes and synthesizes the collective results that emerged from the series of papers published in this issue of J-NABS, and places these results in the context of previously published literature describing variation in aquatic biota...
2000-01-01
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The North Coast Regional Water Quality Control Board (Regional Water Board) convened an Independent Scientific Review Panel (Panel) in August 2002. The objective was to strengthen the science basis for its decision-making for protecting and...
2003-08-12
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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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