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  • 1
    Electronic Resource
    Electronic Resource
    Über die physiologische Bedeutung des Magen-Darm-Rudimentes der Männchen von Asplanchna sieboldi (Rotatoria, Monogononta) (1970)
    Springer
    Journal of comparative physiology 67 (1970), S. 453-454 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The males of Asplanchna sieboldi, which have neither mouth nor anus, possess an organ consisting of several vesicles. It is homologous to the female digestive tract and serves as an energy storage organ. In new-born males it is filled with glycogen, which is used up during their 3–5 day life-span.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297912
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Do Rotifers show “avoidance of the shore”? (1977)
    Springer
    Oecologia 27 (1977), S. 253-260 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The term “avoidance of shore” was used in literature to describe the observation that pelagic crustacea are in general absent near the shore. Experiments in the field show, that Rotifers—which form, together with crustaceans, the main mass of zooplankton—can also be divided not only by morphological criteria but also as a result of their horizontal distribution into inhabitants of either the littoral or the pelagic zone of a lake. These differences of horizontal distribution can be explained by a typical behavioral difference between the littoral rotifer Euchlanis dilatata and the pelagic Asplanchna priodonta: when exposed in the shore zone, Asplanchna wanders in the direction of the pelagic zone, while Euchlanis on the contrary does not prefer any particular direction under the same conditions. Experiments at different lakes with other pelagic rotifers confirm that the “avoidance of shore” shown by Asplanchna is a general phenomenon. The influence of the analyzed behavior on the horizontal distribution patterns of rotifers and the factors which cause and determine the direction of the migration are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00347470
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Field experiments on the optical orientation of pelagic rotifers (1980)
    Springer
    Hydrobiologia 73 (1980), S. 199-203 
    Details
    ISSN: 1573-5117
    Keywords: Pelagic Rotifers ; ‘avoidance of shore’ ; optical orientation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract ‘Avoidance of shore’ by pelagic rotifers is considered to be the result of an optical orientation. Field experiments show that the spatial light distribution in the shore region determines the preferred direction of migration. The behaviour of Eudiaptomus gracilis was tested in comparison to that of rotifers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019447
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    Paper (German National Licenses)
    Fulltext
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