Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/24641
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Exposure to the neonicotinoid imidacloprid disrupts sex allocation cue use during superparasitism in the parasitoid wasp Nasonia vitripennis
Authors: Cook, Nicola
Green, Jade
Shuker, David M
Whitehorn, Penelope R
Contact Email: p.r.whitehorn@stir.ac.uk
Keywords: Neonicotinoids
parasitoid
sex allocation
sex ratio
superparasitism
Issue Date: Dec-2016
Citation: Cook N, Green J, Shuker DM & Whitehorn PR (2016) Exposure to the neonicotinoid imidacloprid disrupts sex allocation cue use during superparasitism in the parasitoid wasp Nasonia vitripennis, Ecological Entomology, 41 (6), pp. 693-697.
Abstract: 1. Neonicotinoid insecticides are potent neurotoxins of significant economic importance. However, it is clear that their use can adversely impact beneficial insects in the environment, even at low, sub-lethal doses.  2. It has recently been shown that the neonicotinoid imidacloprid disrupts adaptive sex allocation in the parasitoid waspNasonia vitripennis(Walker) by limiting their ability to respond to the presence of other females on oviposition patches. In the present study, that work was extended to explore whether sex allocation when superparasitising–laying eggs on a host that has already been parasitised–is also disrupted by imidacloprid.  3. Under superparasitism, sex allocation theory predicts that females should vary their offspring sex ratio in relation to their relative clutch size. It was found that sex allocation under superparasitism inNasoniais disrupted in a dose-dependent manner, with exposed females producing more daughters.  4. Importantly, imidacloprid does not appear to influence the ability of females to estimate the number of eggs already present on a host, suggesting a disassociation between the sex ratio and clutch size cues.  5. The present work highlights the fitness costs to beneficial insects of exposure to neonicotinoids, but also provides clues as to how femaleNasoniause information when allocating sex.
DOI Link: http://dx.doi.org/10.1111/een.12344
Rights: © 2016 The Authors. Ecological Entomology published by John Wiley & Sons Ltd on behalf of Royal Entomological Society This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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