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by Frans Janssens
Luc De Bruyn1,2,
De Meyer, M. 3,
Van Gossum, H. 2 &
Janssens, F. 2
1 Inst. Nature Conservation, Kliniekstr. 25, 1070 Brussel, Belgium
2 Dept. Biology, Univ. of Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
3 Royal Museum for Central Africa, Belgium
Anurida maritima (Guérin) is a cosmopolitan intertidal
collembolan belonging to the family Neanuridae. The species is very common in
tidal marshes and on rocky shores, where it lives as a scavenger. A.
maritima actively forages during low tide and shelters under rocks or in
crevices during high tide, forming aggregations of up to several hundred
individuals. We analysed the foraging microhabitat selection during the
intertidal period on the rocky shore at Wimereux (Boulonais coast, N.W.
France). On an artificial vertical stone wall of + 3.00 m height, we determined
the densities of all sessile organisms (seaweeds, barnacles), as well as the
number of crevices. Two factors turned out to be responsible for the observed
distribution of A.maritima when
it is active outside the crevices, viz. exposure to the sun (densities are
lower on the south facing side) and the density of suitable crevices and the
barnacle Balanus balanoides.
Fig.1. Anurida maritima on surface of puddle at the rocky shore of Wimereux, France.
Luc De Bruyn © 2003.
Index terms: Collembola, foraging microhabitat selection, intertidal.
- De Bruyn, L., De Meyer, M., Scheirs, J., Van Gossum, H. & Janssens, F. 2002.
Foraging microhabitat selection in the intertidal Anurida maritima.,
9th Benelux Congress of Zoology, 8-9 November 2002, Antwerp, Belgium.