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Environ Pollut

Title:		Infodisruption of inducible anti-predator defenses through commercial insect repellents?
Author(s):		von Elert E; Preuss K; Fink P;
Address:		"Aquatic Chemical Ecology, Zoological Institute, University of Cologne, Zulpicher Str. 47b, 50674, Cologne, Germany. Electronic address: evelert@uni-koeln.de. Aquatic Chemical Ecology, Zoological Institute, University of Cologne, Zulpicher Str. 47b, 50674, Cologne, Germany"
Journal Title:		Environ Pollut
Year:		2016
Volume:		20151218
Issue:
Page Number:		18 - 26
DOI:		10.1016/j.envpol.2015.11.032
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Commercial insect repellents like DEET (N,N-diethyl-m-toluamide), EBAAP (IR3535((R)), (3-[N-butyl-N-acetyl]-aminopropionic acid, ethyl ester)) or Icaridine (picaridin, Bayrepel, 1-piperidinecarboxylic acid, 2-(2-hydroxyethyl), 1-methylpropyl ester) are used worldwide to protect against biting insects and ticks. The detection of these repellents in surface waters in concentrations up to several mug/L levels has caused concern that these substances might affect non-target organisms in freshwaters. Daphnia sp., a keystone organism in lakes and ponds, is known for diel vertical migration (DVM) and life-history changes (LHCs) as inducible defenses against predation by fish. Here we test whether (i) environmentally relevant concentrations of DEET, EBAPP or Icaridine have repellent effects on Daphnia magna and (ii) if these repellents are infodisruptors for DVM and LHCs. Using concentrations of up to 44 mug/L, the repellents neither had effects on juvenile somatic growth nor on clutch size. In thermally stratified water columns with a repellent-free hypolimnion, no repellent effects of the test compounds on D. magna were observed. The presence of fish-born infochemicals induced LHCs, which are characterized by a reduced size at first reproduction, and DVM in D. magna. These effects were not affected by the presence of either repellent. Hence no evidences for infodisruption of the chemical communication of fish and Daphnia by DEET, EBAAP or Icaridine were found"
Keywords:		Animals Deet *Daphnia *Insect Repellents Piperidines Propionates beta-Alanine/analogs & derivatives Daphnia Ebaap Icaridine Infodisruption Repellent;
Notes:		"Medlinevon Elert, Eric Preuss, Katja Fink, Patrick eng England 2015/12/29 Environ Pollut. 2016 Mar; 210:18-26. doi: 10.1016/j.envpol.2015.11.032. Epub 2015 Dec 18"