Article (Scientific journals)
Cuticular hydrocarbon composition does not allow Harmonia axyridis males to identify the mating status of sexual partners
Legrand, Pauline; Vanderplanck, Maryse; Lorge, Stéphanie et al.
2019In Entomologia Generalis, 38 (3), p. 211 - 224
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Abstract :
[en] Males of polyandrous species have to overcome sperm competition. They should select their mate based on the reproductive status of the female to increase their own fitness. Because the sexual behavior of lady beetles relies on semiochemicals, with cuticular hydrocarbons (CHCs) being used for mate recognition, we developed and tested two hypotheses. First, we hypothesized that the cuticular hydrocarbon profile qualitatively and quantitatively differs between virgin and mated Harmonia axyridis females, regardless of the color morph. Second, we hypothesized that males discriminate virgin and mated females, preferring copulating with virgin females, rather than previously mated ones, to avoid sperm competition and subsequently increase their fitness. CHCs were solvent-extracted before being quantified and identified by gas chromatography. We found no qualitative differences between mated and unmated females irrespective of the morph; however, quantitative differences were detected. Specifically, the CHC profiles of mated females presented higher concentrations of alkenes, including 9-pentacosene, 9-heptacosene, and 9-hentriacontene. During dual-choice behavioral assays, males equally copulated with virgin and mated females. Our results suggest that there is no CHC-based discrimination strategy in virgin males of H. axyridis between virgin and once-mated females. We discuss alternative strategies that might be used in this lady beetle species.
Disciplines :
Entomology & pest control
Author, co-author :
Legrand, Pauline  
Vanderplanck, Maryse  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Analyse, qual. et risques - Labo. de Chimie analytique
Lorge, Stéphanie ;  Université de Liège - ULiège > Bureau Environnement et Analyse (GxABT)
Maesen, Philippe  ;  Université de Liège - ULiège > Dvlpt. méth. chimie app. à l'agri., l'agro-ali. et/ou l'env.
Lognay, Georges ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Vilcinskas, Andreas
Vogel, Heiko
Estoup, Arnaud
Foucaud, Julien
Francis, Frédéric  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs
Facon, Benoit
Verheggen, François  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Gestion durable des bio-agresseurs
 These authors have contributed equally to this work.
Language :
English
Title :
Cuticular hydrocarbon composition does not allow Harmonia axyridis males to identify the mating status of sexual partners
Publication date :
2019
Journal title :
Entomologia Generalis
ISSN :
0171-8177
eISSN :
2363-7102
Publisher :
E. Schweizerbart'sche Verlagsbuchhandlung, Germany
Volume :
38
Issue :
3
Pages :
211 - 224
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 642420 - BiodivERsA3 - Consolidating the European Research Area on biodiversity and ecosystem services
Funders :
CE - Commission Européenne
Available on ORBi :
since 27 March 2019

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