Narrow versus broad: Sexual dimorphism in the wing form of western European species of the subgenus Avaritia (Culicoides , Ceratopogonidae)

Muñoz-Muñoz Francesc, Pagès Nonito, Durao Ana F., England Marion, Werner Doreen, Talavera Sandra. 2021. Narrow versus broad: Sexual dimorphism in the wing form of western European species of the subgenus Avaritia (Culicoides , Ceratopogonidae). Integrative Zoology, 16 (5) : 769-784.

Quartile : Q2, Sujet : ZOOLOGY

Résumé : While wing form is known to differ between males and females of the genus Culicoides, detailed studies of sexual dimorphism are lacking. In this study, we analyze sex-specific differences in the wing form of 5 species of the subgenus Avaritia, using geometric morphometrics and comparative phylogenetic methods. Our results confirm the existence of marked sexual dimorphism in the wing form of the studied species and reveal for the first time that while there is a shared general pattern of sexual shape dimorphism within the subgenus, sexual size dimorphism, and particular features of sexual shape dimorphism differ among species. Sexual shape dimorphism was found to be poorly associated to size and the evolutionary history of the species. The tight association of sexual shape dimorphism with aspect ratio suggests that the shape of the wing is optimized for the type of flight of each sex, that is, dispersal flight in females versus aerobatic flight in males. Moreover, the fact that interspecific shape differences are greater and more strongly associated to aspect ratio in males than in females might be indicating that in males the selective pressures affecting flight performance characteristics are more heterogeneous and/or stronger than in females among the studied species.

Mots-clés Agrovoc : Culicoides, dimorphisme sexuel, Ceratopogonidae, sex ratio, femelle, différence biologique

Mots-clés libres : Aspect ratio, Geometric morphometrics, Phylogenetic signal, Shape, Size

Agences de financement hors UE : Instituto Nacional de Investigaciones Agrarias

Auteurs et affiliations

• Muñoz-Muñoz Francesc, Universitat Autonoma de Barcelona (ESP) - auteur correspondant
• Pagès Nonito, CIRAD-BIOS-UMR ASTRE (FRA) ORCID: 0000-0001-6020-7175
• Durao Ana F., Universitat Autonoma de Barcelona (ESP)
• England Marion, The Pirbright Institute (GBR)
• Werner Doreen, Leibniz Centre for Agricultural Landscape Research (DEU)
• Talavera Sandra, CReSA (ESP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/605788/)

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