01531nas a2200181   4500008004100000245006400041210006400105260000800169300001100177490000800188520100700196100002001203700002101223700001801244700002101262700001701283856004901300       2007                        eng d00aPredatory insects as bioindicators of heavy metal pollution0 aPredatory insects as bioindicators of heavy metal pollution  cJan  a339-470 v1453 aHeavy metal concentrations of different predatory insects were studied near by a steel factory and from control sites. Waterstriders (Gerridae), dragon fly larvae (Odonata), antlion larvae (Myrmeleontidae) and ants (Formicidae) were analyzed by AAS. In most cases the metal concentrations were higher near the factory, but e.g. waterstriders had higher cadmium concentrations in control area. Discriminant analysis clearly reveals that all these insect groups can be used as heavy metal indicators. However, the commonly used ants were the least effective in indicating the differences between the factory and control sites. Waterstriders are good in detecting differences in iron and manganese, but seem to be poor in accumulating nickel and lead. Antlions are efficient in detecting differences in iron. Antlions and ants are effective in accumulating manganese; as well antlions are efficient in accumulating cadmium. Waterstriders are poor in accumulating lead, but antlions and ants are effective.1 aNummelin, Matti1 aLodenius, Martin1 aTulisalo, Esa1 aHirvonen, Heikki1 aAlanko, Timo  uhttps://worldodonata.myspecies.info/node/23901613nas a2200205   4500008004100000245011000041210006900151260000800220300001100228490000800239520097700247100002101224700001801245700001801263700001701281700002501298700001701323700001801340856004901358       2009                        eng d00aBehaviour of damselfly larvae (Enallagma cyathigerum) (Insecta, Odonata) after long-term exposure to PFOS0 aBehaviour of damselfly larvae Enallagma cyathigerum Insecta Odon  cApr  a1332-60 v1573 aPerfluorooctane sulfonic acid (PFOS) is a persistent and ubiquitous environmental contaminant that has been detected in organisms worldwide. Here, we evaluate whether long-term (1 and 4 months) exposure to PFOS contamination affects the behavioural performance of freshwater larvae of the damselfly Enallagma cyathigerum (Insecta: Odonata). Our results show reduced behavioural performance with increasing PFOS concentration. In 1 month exposed larvae, no observed effect concentrations (NOECs) were 100 microg/L for general activity. In 4 months exposed larvae, NOECs were 10 microg/L, for each behavioural trait, except swimming acceleration of male larvae where the NOEC was 100 microg/L. When faced with PFOS concentrations above the NOEC, E. cyathigerum larvae were less active, less capable to escape a simulated predator attack and less efficient in foraging. Together, our results show that damselfly larvae suffer reduced survival-related behavioural performance.1 aVan Gossum, Hans1 aBots, Jessica1 aSnijkers, Tom1 aMeyer, Johan1 aVan Wassenbergh, Sam1 aDe Coen, Wim1 aDe Bruyn, Luc  uhttps://worldodonata.myspecies.info/node/209