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  • 1
    Electronic Resource
    Electronic Resource
    USING ARTIFICIAL STREAMS TO EVALUATE PERTURBATION EFFECTS ON AUFWUCHS STRUCTURE AND FUNCTION (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 16 (1980), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Artificial streams can assist in assessing the potential impact of pollutants on the structure and function of aquatic communities. While most artificial streams are constructed within a controlled environment or are maintained by recirculating water, we constructed a series of artificial streams along a river bank using river water on a once through basis. This system was used to develop and test methods for structural and functional analyses of Aufwuchs communities. Only the flow rate and stream depth were controlled while individual streams were perturbed to obtain communities of altered ecological condition. This experimental system provided a relatively inexpensive series of treated and untreated streams which allowed an evaluation and comparison of methods using communities under various stressed and nonstressed conditions. Without the stabilizing effects of a controlled atmosphere or recirculating water, our approach demonstrated a degree of variability which approached that of the river. We inferred that the Aufwuchs community present in the artificial streams maintained a high degree of structural complexity and functional dynamism, providing a strong test of our methods and an opportunity to examine current ecological theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1980.tb02338.x
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  • 2
    Electronic Resource
    Electronic Resource
    Coherent microscopy and matched spatial filtering for real-time recognition of diatom species. (1978)
    s.l. : American Chemical Society
    Environmental science & technology 12 (1978), S. 940-946 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es60144a014
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  • 3
    Electronic Resource
    Electronic Resource
    A cinematographic investigation into the fish's bioelectric breathing signal (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 14 (1979), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The buccal-ventilatory movements of bluegill sunfish, Lepomis macrochirus and fathead minnows Pimephales promelas and strip chart recordings of these movements were filmed simultaneously. The amplitudes of the ventilatory signals were greatest when a fish was perpendicular to the plane of either electrode, and the polarity of a signal corresponded to the fish's direction to one of the electrodes. The most common breathing waveforms for both species reflected a bimodal pattern. These patterns varied in frequency and shifted toward single modality in response to stress. Portions of the recorded waveforms consistently coincided with the period in which a fish was displaying either full opercular flare or closure. Similar occurrences corresponded with mouth positions. Several commonly occurring variations of the ventilatory signal waveforms are presented, including the response of bluegill sunfish to a strong concentration of chlorinated water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1979.tb03540.x
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  • 4
    Electronic Resource
    Electronic Resource
    DETERMINING THE ACCURACY OF COHERENT OPTICAL IDENTIFICATION OF DIATOMS (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 15 (1979), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The discriminating capability of a coherent optical processor in identifying diatom species was tested using 25 species selected by diatom taxonomists. A 25 × 25 matrix of auto- and cross-correlations was used for this purpose. In no case did cross-correlation signals approach the intensity of auto-correlations indicating that false identifications were extremely improbable. Shape and height differences of the cross-correlation signals can be attributed to variations in diatom shapes, sizes, and cell wall morphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1979.tb01187.x
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  • 5
    Electronic Resource
    Electronic Resource
    Use ofSelenastrum capricornutum and microfeast™ as food forDaphnia pulex (1990)
    Springer
    Bulletin of environmental contamination and toxicology 44 (1990), S. 59-66 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01702362
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of elevated calcium concentration on Na-K-ATPase activity of two euryhaline species,Cyprinodon variegatus andMysidopsis bahia (1990)
    Springer
    Bulletin of environmental contamination and toxicology 44 (1990), S. 121-128 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01702371
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of suspended solids on the biotransformation of acenaphthene (1986)
    Springer
    Bulletin of environmental contamination and toxicology 36 (1986), S. 286-293 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01623509
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of suspended solids on the water column biotransformation of anthracene (1987)
    Springer
    Archives of environmental contamination and toxicology 16 (1987), S. 637-642 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The effects of suspended solids in concentrations of 10 and 1000 mg/L on the water column biotransformation of anthracene was investigated. The suspended solids and water sources were from an eutrophic pond and a meso-oligotrophic reservoir. The biotransformation pseudo-first-order rate coefficients were 0.30/day per day and 0.34/day for 1,000 and 10 mg/L suspended solids, respectively, for the eutrophic pond sediments. The meso-oligotrophic sediments showed pseudo-first-order biotransformation rate coefficients of 0.82/day and 0.69/day for suspended solid concentrations of 1,000 mg/L and 10 mg/L, respectively. Statistically, no significant difference was shown in the pseudo-first-order biotransformation rate coefficients in either system between 10 and 1,000 mg/L suspended solids concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01055821
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  • 9
    Electronic Resource
    Electronic Resource
    Acute and Chronic Toxicity of Azinphos-Methyl to Two Estuarine Species, Mysidopsis bahia and Cyprinodon variegatus (1997)
    Springer
    Archives of environmental contamination and toxicology 32 (1997), S. 436-441 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract. The acute and chronic toxicity of azinphos-methyl (Guthion) was evaluated for two estuarine species in the laboratory. Mysids (Mysidopsis bahia) and sheepshead minnows (Cyprinodon variegatus) were selected as the representative invertebrate and vertebrate estuarine test species, respectively. The toxicological endpoints determined for each species included the 96-h LC50, the no-observed-effect concentration (NOEC), the maximum acceptable toxicant concentration (MATC), and the acute-to-chronic ratio. The 96-h LC50 value derived for sheepshead minnows (2.0 μg/L) was seven times higher than the 96-h LC50 value (0.29 μg/L) derived for mysids. The MATCs were 0.024 μg/L and 0.24 μg/L for the mysid and the sheepshead minnow, respectively. The estimated acute-to-chronic ratios were 12 for mysids and 8.3 for sheepshead minnows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002449900210
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  • 10
    Electronic Resource
    Electronic Resource
    Fish bioassay monitoring of waste effluents (1979)
    Springer
    Environmental management 3 (1979), S. 217-235 
    Details
    ISSN: 1432-1009
    Keywords: Bioassay ; Monitoring ; Waste effluent ; Fish ; Lepomismacrochirus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Spills of toxic materials into bodies of water receiving industrial waste discharges can be prevented only if frequent or continuous assessments of effluent quality can be made. Currently available methods can automatically measure individual physical or chemical waste components but cannot assess toxicity caused by the interaction of components or the presence of an unsuspected material. Aquatic organisms, in contrast, respond to their total environment and in this way integrate the effects of all the various chemical and physical waste parameters. This study evaluates the possibility of using the continuously and automatically recorded responses of fish to monitor the toxicity of industrial waste effluents. A review of previously developed toxicity monitoring systems is followed by a field evaluation of a method that uses the computer-monitored ventilatory patterns of 12 bluegills (Lepomis macrochirus Rafinesque) to monitor the toxicity of an industrial waste effluent as it flows into a river. No known toxic spills occurred in the effluent during the operation of this system, but acetone added to the effluent waste caused responses from the fish at concentrations which peaked near the 96-hr LC50 level. Some responses were also noted when no known toxicant was present; these were related to environmental disturbances and system design problems. Recommendations are made for the design of future biologic monitoring units.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01866497
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