Seasonal development and dormancy of insects and mites feeding onolive: a review Minos E. Tzanakakis 87
A coupled oscillator model describes normal and strangezooplankton swimming behaviour Joop Ringelberg and Rob Lingeman 225
The temporal and spatial relationshipbetween stenotopic dwarfspiders (Erigoninae: Araneae)and their prey(Isotomidae: Collembola)in coastal grey dunes: a numerical aggregativeresponse or commonmicrohabitat preference? D. Bonte and J. Mertens 243
Survival differences ofthe two male morphs in the dwarf spiderOedothorax gibbosus Blackwall, 1841(Erigoninae,Linyphiidae, Araneae) D. Vanacker,J.-P. Maelfait andF. Hendrickx 255
No nocturnal energetic savings in response to hard work in free-livinggreat tits Popko Wiersma and Joost M. Tinbergen 263
Reproductive strategies of twosympatric `small barbs' (Barbus humilis andB. tanapelagius, Cyprinidae) in Lake Tana,Ethiopia E. Dejen, F.A. Sibbing andJ. Vijverberg 281
