| Title: | Daphnia response to biotic stress is modified by PCBs |
| Author(s): | Bernatowicz P; Pijanowska J; |
| Address: | "Department of Hydrobiology, Faculty of Biology, University of Warsaw, Banacha 2, 02-097 Warsaw, Poland. p.p.bernatowicz@uw.edu.pl" |
| DOI: | 10.1016/j.ecoenv.2010.10.029 |
| ISSN/ISBN: | 1090-2414 (Electronic) 0147-6513 (Linking) |
| Abstract: | "The aim of this study was to examine the influence of xenobiotics (PCBs) on the responses of Daphnia to biotic factors such as the presence of a predator (fish kairomone) or filamentous cyanobacteria. Both behaviour (depth selection) and life history (body size at first reproduction and fecundity) were affected by these stressors. Though there was no direct effect of PCBs, their influence resulted in disruption of the 'natural' reaction to the presence of fish or cyanobacteria, leading to inadequate responses of Daphnia to these biotic threats. Examined clones of Daphnia showed significant diversity in their reaction to these stress factors, which was greater than that between Daphnia clones exposed to different environmental conditions. PCB pollution may change the frequency of Daphnia clones in favour of those whose responses to biotic stress are similar in both the absence and presence of these toxic chemicals" |
| Keywords: | "Animals Cyanobacteria/pathogenicity Daphnia/*drug effects/microbiology/physiology Environment Fertility/drug effects Fishes/metabolism Fresh Water/chemistry/microbiology Pheromones/toxicity Polychlorinated Biphenyls/*toxicity Stress, Physiological Water M;" |
| Notes: | "MedlineBernatowicz, Piotr Pijanowska, Joanna eng Research Support, Non-U.S. Gov't Netherlands 2010/11/26 Ecotoxicol Environ Saf. 2011 May; 74(4):711-8. doi: 10.1016/j.ecoenv.2010.10.029. Epub 2010 Nov 20" |
