Die turbellarien als träger von giften

Arndt, Walther; Manteufel, Paul

doi:10.1007/bf00408147

Cited by 10 publications

(1 citation statement)

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“…For hunting, D. lacteum produces mucus, which adheres to the legs of prey, e.g., A. aquaticus, thus making it difficult for them to move and escape (De Silva 1976). In addition to this mechanical effect of mucus, which decreases the activity of A. aquaticus, it is assumed that mucus contains toxic substances that may also improve the predation success of D. lacteum (Arndt and Manteufel 1924;Dumont and Carels 1987;Miyazawa et al 1987). Regardless of the mucus mode of action, it is undoubted that it increases the predation Table 3 Output of the three-factorial ANOVA corrected for pseudoreplication due to repeated measures (=the factor time was considered as random factor) assessing differences in the number of preyed individuals of A. aquaticus by D. lacteum during exposure to three levels of pesticides (control, lambda-cyhalothrin, and tebuconazole) The statistical analysis, summarised as ''grouping factors'', assessed the implications of the fixed factors solely, namely, presence of the predator and pesticide treatment, as well as their interaction term.…”

Section: Discussionmentioning

confidence: 99%

Combined Effect of Invertebrate Predation and Sublethal Pesticide Exposure on the Behavior and Survival of Asellus aquaticus (Crustacea; Isopoda)

Bundschuh

Appeltauer

Dabrunz

et al. 2012

Arch Environ Contam Toxicol

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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-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's activity influenced its probability to stick to mucus, a viscous substance released by D. lacteum, or to encounter the predator directly.

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Section: Discussionmentioning

confidence: 99%