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  • 1
    Electronic Resource
    Electronic Resource
    Presence of sculpins (Cottus gobio) reduces drift and activity of Gammarus pulex (Amphipoda) (1986)
    Springer
    Hydrobiologia 133 (1986), S. 209-215 
    Details
    ISSN: 1573-5117
    Keywords: Gammarus pulex ; sculpin ; drift ; anti-predatory behaviour
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Introduction of sculpins into a stream previously devoid of these predators significantly reduced drift rate of Gammarus pulex. The drift of insect larvae was not affected. High amounts of exudates after implantation of sculpins were probably responsible for the low number of drifting G. pulex specimens. Laboratory experiments confirmed reduced locomotory activity of G. pulex when exposed to caged sculpins, an observation that excludes reduced drift activity as a result only of predation. The average size of drifting G. pulex specimens was larger during the night than during the day. This result is in accordance with the hypothesis that large individuals should, in relation to small ones, turn nocturnal because of greater predation risk during daytime. Presence of sculpins did not alter the size composition of drifting G. pulex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005592
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  • 2
    Electronic Resource
    Electronic Resource
    Measurements of H2S and SO2 over the Atlantic Ocean (1984)
    Springer
    Journal of atmospheric chemistry 1 (1984), S. 111-123 
    Details
    ISSN: 1573-0662
    Keywords: Sulfur gases ; marine atmosphere ; diurnal variations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Concentrations of sulfur gases H2S and SO2 have been measured in the marine atmosphere over the Atlantic Ocean at various sites. Mean values of 40 ng H2S m-3 STP and 209 ng SO2 m-3 STP are the results of the measurements. A diurnal variation of H2S concentration was detected on the west coast of Ireland with nighttime concentrations of up to 200 ng H2S m-3 STP and values below detection limit (15 ng H2S m-3 STP) during daytime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00053834
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    Paper (German National Licenses)
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