01936nas a2200181   4500008004100000022001400041245015000055210006900205260002900274300001000303490000700313520128700320100002101607700002401628700002001652700001701672856006501689       2012                        eng d  a1432-070300aCombined effect of invertebrate predation and sublethal pesticide exposure on the behavior and survival of Asellus aquaticus (Crustacea; Isopoda)0 aCombined effect of invertebrate predation and sublethal pesticid  bSpringer-Verlagc07/2012  a77-850 v633 a<p>Invertebrate communities of lentic habitats comprise, amongst others, the crustacean Asellus aquaticus (Isopoda) and the turbellarian Dendrocoelum lacteum (Tricladida). Because D. lacteum preferentially preys on A. aquaticus, contaminants introduced into the aquatic environment may affect this predator&ndash;prey interaction, finally influencing the performance of the predator. However, no studies investigating implications of organic pollutants on this food web subsystem currently exist. Hence, the present study assessed short-term implications of pesticides with different modes of action, namely, the triazole fungicide tebuconazole and the pyrethroid insecticide lambda-cyhalothrin, during a 72 h trial. The experiments for tebuconazole showed a statistically significant decrease in predatory success of D. lacteum. Lambda-cyhalothrin, in contrast, increased predation success by 40%, which is, however, not statistically significant. Both the decrease and the increase in predation seemed to be primarily driven by an altered activity of the prey A. aquaticus. This may be hypothesized because any shift in the prey&rsquo;s activity influenced its probability to stick to mucus, a viscous substance released by D. lacteum, or to encounter the predator directly.</p>
1 aBundschuh, Mirco1 aAppeltauer, Andreas1 aDabrunz, André1 aSchulz, Ralf  uhttp://link.springer.com/article/10.1007%2Fs00244-011-9743-2