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Zur Lokomotionsaktivität des Amphipoden Orchestia platensis im Freiland und im Laboratorium
Rüppell, G. (1967). Zur Lokomotionsaktivität des Amphipoden Orchestia platensis im Freiland und im Laboratorium. Helgol. Wiss. Meeresunters. 15(1-4): 172-180. https://dx.doi.org/10.1007/BF01618621
In: Helgoländer Wissenschaftliche Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0017-9957
Also appears in:
Kinne, O.; Aurich, H. (Ed.) (1967). Vorträge und Diskussionen. Erstes Europäisches Symposion über Meeresbiologie = Papers and discussions. First European Symposium on Marine Biology = Rapports et discussions. Premier symposium européen sur biologie marine. European Marine Biology Symposia, 1. Helgoländer Wissenschaftliche Meeresuntersuchungen, 15(1-4). 669 pp., more
Peer reviewed article  

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Keyword
    Marine/Coastal

Author  Top 
  • Rüppell, G.

Abstract
    The daily locomotory activity of Orchestia platensis (Kröyer) was recorded in situ and under constant conditions in the laboratory. The equipment for automatical recording is described. The species is very abundant along the coast of the Baltic Sea (non-tidal conditions). It only propagates for about half a year (April–October, Bock 1967). During this time the adults have a nocturnal activity; thus the time of ecological activity is very limited. Not every night suits Orchestia: severe darkness, rain, low temperature and wind, depress their activity. As a result, only about 10% of the total life-span of Orchestia can be utilized for feeding, propagation and other ecologically important functions. Further difficulties arise from catastrophies in the biotope of Orchestia: inundation or desiccation cause mass emigrations even during the day, when predators are active. Therefore losses are very high. Orchestia adapts to these conditions by at once utilizing favourable conditions. An endogenous component of their activity can be easily revealed by studies under constant conditions but is practically of no importance in the natural biotope. An endogenous pattern of activity, as in mammals or birds, is therefore not discernible.

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