Publications

fate and effects of esfenvalerate in agricultural ponds.	the fate of esfenvalerate was investigated by sampling and chemical analysis after spraying of an artificial pond (25 g a.i./ha) and in the laboratory with [14c]esfenvalerate by trapping of 14co2 and fractionation of the sediment. the effects were investigated on pelagic communities in enclosures in a natural lake and in the laboratory on surface (cymatia coleoptrata) and sediment (chironomus riparius) insects. the latter were used in sediment-plus-water and in water-only tests, measuring effect ...	2001	11434300
predator cues magnify effects of the pesticide endosulfan in water bugs in a multi-species test in outdoor containers.	pesticides have become major stressors in many aquatic communities. laboratory studies suggest their impact may be further magnified in the presence of cues from predators. despite their importance for ecological risk assessment, synergisms between pesticides and predator cues have not been confirmed under semi-natural outdoor conditions. we evaluated how the presence of predator cues and the presence of a non-corixid community affect the pesticide sensitivity of five water bug (corixidae) speci ...	2013	23728356
achiasmate male meiosis in two cymatia species (hemiptera, heteroptera, corixidae).	the karyotype and male meiosis, with a particular focus on the presence or absence of chiasmata between the homologs, were studied in the water boatman species cymatia rogenhoferi (fieber) and cymatia coleoptrata (fabricius) (corixidae, cymatiainae). it is shown that the species have 2n = 33 (28a+2m+x1x2y) and 2n = 24 (20a+2m+xy) respectively, post-reduction of sex chromosomes, and achiasmate meiosis of an alignment type in males. cytogenetic and some morphological diagnostic characters separati ...	2015	26807038