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  • 1
    Electronic Resource
    Electronic Resource
    Determining coastal inlet flushing times: a practical expression for use in aquaculture and pollution management (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 27 (1996), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: It is often necessary to compare the flushing of coastal inlets in selecting sites for aquaculture or in making recommendations on pollution hazards. We derive an expression for a reference flushing time.in which h is the mean depth of the inlet, (E-R) is the net evaporation rate, S1 is the salinity of the open ocean, S2 is the (volume) average salinity in the inlet and ΔS = S2-S1o is easily evaluated from simply obtained data sets, especially in a steady-state situation, or for an harmonic annual cycle. We show that o is a good estimate of the flushing time for sources within the body of the inlet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.1996.tb01279.x
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  • 2
    Electronic Resource
    Electronic Resource
    Foraging kinematics of barramundi during early stages of development (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 57 (2000), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Contrary to expectations there was no transition from a saltatory to a cruise search strategy in foraging behaviour of 7-to 33-day-old barramundi over the period of metamorphosis. Rather, there was a continual change in foraging behaviour, with increasing durations between swimming pauses and increasingly straight swimming paths, implying that hydrodynamic constraints on swimming may be a key determinant of foraging kinematics. It is suggested that the notion of saltatory search as a third, unique foraging strategy needs to be re-evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2000.tb02176.x
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  • 3
    Electronic Resource
    Electronic Resource
    Riftward younging of volcanic units in the Addis Ababa region, Ethiopian rift valley (1979)
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 284-288 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A general riftward younging of surficial volcanic units is a feature of the Addis Ababa sector of the Ethiopian rift valley. The narrowing of the volcanic zone with time is due to crustal necking and topographical ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/280284a0
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  • 4
    Electronic Resource
    Electronic Resource
    Age of Fault Movements in Tanzanian Sector of East African Rift System (1974)
    [s.l.] : Nature Publishing Group
    Nature 247 (1974), S. 354-356 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Analyses of Rocks Selected from Locations given in Fig. 2 Sample No. Faulting in Tarosero area Faulted rocks Olivine basalt 309 Sodic trachyte 305 Sodic trachyte 306 Sodic trachyte 510 Unfaulted rocks Sodic trachyte 490 Sodic trachyte 488 Locality Tarosero Tarosero Tarosero ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/247354a0
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  • 5
    Electronic Resource
    Electronic Resource
    The limited extent of plume-lithosphere interactions during continental flood-basalt genesis: geochemical evidence from Cretaceous magmatism in southern Brazil (1999)
    Springer
    Contributions to mineralogy and petrology 137 (1999), S. 147-169 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract It has been suggested that large areas of the Earth's lithospheric mantle undergo pervasive dehydration melting during the impact of mantle plumes and the Early-Cretaceous Paraná-Etendeka continental flood-basalt (CFB) province has repeatedly been cited as evidence of this phenomenon. During the Cretaceous, however, southern Brazil experienced two phases of mafic magmatism. These igneous events occurred ∼50 Ma apart and therefore represent distinct episodes of melt genesis in the underlying mantle. The first phase of magmatism, in the Early Cretaceous, included the emplacement of lava flows associated with the Paraná-Etendeka CFB province and also the intrusion of small-volume mafic alkaline magmas (e.g. Anitápolis, Jacupiranga and Juquiá) in the Dom Feliciano and Ribeira mobile belts. During the Late Cretaceous, both sodic and potassic mafic magmas were emplaced on the margin of the adjacent Luis-Alves craton and intrude the flood-basalts at Lages. On the basis of variations in incompatible trace-element concentrations (e.g. Ba = 1000 to 2000 ppm), initial 87Sr/86Sr ratios (0.7048–0.7064) and ɛNd values (−3 to −12), we suggest that all of the Late-Cretaceous mafic potassic magmas were derived from the subcontinental lithospheric mantle (SCLM) which was metasomatically enriched during the Proterozoic. We propose that these relatively low temperature, volatile-rich, mafic melts provide direct evidence that the underlying SCLM did not melt wholesale during the previous Early-Cretaceous Paraná-Etendeka CFB event. Late-Cretaceous melting of the SCLM beneath southern Brazil may have been caused by heat conduction from either: (1) ponded ∼132 Ma Tristan plume-head material; or (2) ∼85 Ma Trindade plume-head material channelled southwards between the thick cratonic keels of the Amazonas and São Francisco cratons. The Late-Cretaceous magmatism appears to have been contemporaneous with uplift across southern Brazil and Paraguay; we suggest that both of these phenomena represent the widespread effects of the impact of the Trindade mantle plume on the base of the SCLM. Plate margin stresses and lithospheric extension associated with the opening of the South Atlantic may also have changed the geothermal gradient beneath southern Brazil and contributed to mantle melting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050588
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  • 6
    Electronic Resource
    Electronic Resource
    Siliceous nanoplankton. II. Newly discovered cysts and abundant choanoflagellates from the Weddell Sea, Antarctica (1980)
    Springer
    Marine biology 58 (1980), S. 211-217 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Siliceous choanoflagellates and previously undescribed, siliceous cyst-like spheroids (in the size range 2.5 to 15 μm) were found below sea-ice in the Weddell Sea and studied with scanning electron microscopy. Cell counts from water samples obtained over a 10,000 km area indicated that both spheroids and choanoflagellates were abundant in the upper 100 m of the water column, averaging about 105 cells l-1. The large numbers of phagotrophic choanoflagellates suggest that bacterioplankton-picoplankton food chains are important and may indicate the presence of longer, more complex trophic networks than previously considered in Antarctic waters. Circumstantial evidence suggests that the spheroids may be the cysts of choanoflagellates; if so, the production of siliceous cysts by members of this enigmatic taxon may be of considerable interest in discussions of the phylogenetic position of the group in relation to the algae and the metazoans. Similar cysts were found simultaneously in the North Pacific Ocean (see preceding paper: Booth et al. 1980), and recently we have discovered the cysts in the upwelling area of the eastern tropical Pacific Ocean. The occurrence of the cyst in such geographically distant localities suggests that they have a worldwide distribution. Since the minute cysts are easily overlooked on the light microscope, their recognition and further study undoubtedly require the electron microscopic examination of plankton samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391878
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  • 7
    Electronic Resource
    Electronic Resource
    Mechanoreception in calanoid copepods (1986)
    Springer
    Marine biology 90 (1986), S. 529-535 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A model of early detection of individual algal prey by copepod mechanoreception suggests that mechanoreception may serve as an indicator of prey position. Our model shows that the magnitude of the pressure disturbance created by a particle entrained in a feeding flow of a copepod increases linearly with increasing particle size, decreases as the square of the distance away from the antenna, and is unique for a given particle size. These pressure disturbances may be utilized by the copepod to determine the size and location of particles present in the feeding current and may provide information necessary for initial prey detection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409273
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  • 8
    Electronic Resource
    Electronic Resource
    Proof rules for the programming language Euclid (1978)
    Springer
    Acta informatica 10 (1978), S. 1-26 
    Details
    ISSN: 1432-0525
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Summary In the spirit of the previous axiomatixation of the programming language Pascal, this paper describes Hoare-style proof rules for Euclid, a programming language intended for the expression of system programs which are to be verified. All constructs of Euclid are covered except for storage allocation and machine dependencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260921
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