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A sex allocation cost to polyandry in a parasitoid wasp

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boulton2015biollett20150205.pdf (391.3Kb)
Date
03/06/2015
Author
Boulton, Rebecca
Shuker, David Michael
Keywords
Polyandry
Sex allocation
Sexual conflict
QH301 Biology
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Abstract
The costs and benefits of polyandry are central to understanding the near-ubiquity of female multiple mating. Here, we present evidence of a novel cost of polyandry: disrupted sex allocation. In Nasonia vitripennis, a species that is monandrous in the wild but engages in polyandry under laboratory culture conditions, sexual harassment during oviposition results in increased production of sons under conditions that favour female-biased sex ratios. In addition, females more likely to re-mate under harassment produce the least female-biased sex ratios, and these females are unable to mitigate this cost by increasing offspring production. Our results therefore argue that polyandry does not serve to mitigate the costs of harassment (convenience polyandry) in Nasonia. Furthermore, because males benefit from female-biased offspring sex ratios, harassment of ovipositing females also creates a novel cost of that harassment for males.
Citation
Boulton , R & Shuker , D M 2015 , ' A sex allocation cost to polyandry in a parasitoid wasp ' , Biology Letters , vol. 11 , 20150205 . https://doi.org/10.1098/rsbl.2015.0205
Publication
Biology Letters
Status
Peer reviewed
DOI
https://doi.org/10.1098/rsbl.2015.0205
ISSN
1744-9561
Type
Journal article
Rights
Copyright 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Description
R.A.B. is supported by a NERC DTG studentship.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/6926

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