Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)

Sexual selection on morphology was examined in the lek-mating fly Ceratitis capitata (Weidemann). Single-pair courtships were videotaped in small chambers for males from a laboratory strain (L males) and males from the laboratory G2 generation of a sample of wild flies (W males). Virgin females deri...

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Autores principales: Norry, F.M., Calcagno, G., Vera, M.T., Manso, F., Vilardi, J.C.
Formato: JOUR
Materias:
Ceratitis capitata
Courtship behavior
Lek
Mate choice
Morphology
Sexual selection
competition
fly
morphology
sexual selection
Diptera
Tephritidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00138746_v92_n4_p571_Norry
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00138746_v92_n4_p571_Norry
record_format dspace
spelling todo:paper_00138746_v92_n4_p571_Norry2023-10-03T14:11:34Z Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae) Norry, F.M. Calcagno, G. Vera, M.T. Manso, F. Vilardi, J.C. Ceratitis capitata Courtship behavior Lek Mate choice Morphology Sexual selection competition fly morphology sexual selection Ceratitis capitata Diptera Tephritidae Sexual selection on morphology was examined in the lek-mating fly Ceratitis capitata (Weidemann). Single-pair courtships were videotaped in small chambers for males from a laboratory strain (L males) and males from the laboratory G2 generation of a sample of wild flies (W males). Virgin females derived from the wild population were used for all observations. The time spent on each courtship behavior (pheromone calling, wing fanning, wing buzzing, copulation attempt [mounting], missed jump during attempted copulation, and stationary status) was scored. Behavior was uncorrelated with morphology, except for a negative correlation between scutellum width and missed jump in L males. A multivariate analysis revealed that copulatory success is influenced by intermale variation to attempt copulation. Stabilizing sexual selection was apparent on eye length in L males and head width in W males, but size-related traits of thorax and wings had no effect on mating success. Because this selection was independent of any possible male-male competition, intersexual selection on male morphology is implied. Sexual selection on morphology was also substantial in a field cage experiment, where virgin flies were released into a cage containing a small host tree. The results of this caged experiment were consistent with those of single-pair courtships in that head morphology was suggested as a selection target, but directional selection (decreasing the trait mean) rather than stabilizing selection was apparent. Overall, male's head morphology was suggested to be at least one of the more probable direct target of mate choice of females once at a lek. The results are thus consistent with the predominant view that female mate choice is often significant in lek-mating systems. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00138746_v92_n4_p571_Norry
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ceratitis capitata
Courtship behavior
Lek
Mate choice
Morphology
Sexual selection
competition
fly
morphology
sexual selection
Ceratitis capitata
Diptera
Tephritidae
spellingShingle Ceratitis capitata
Courtship behavior
Lek
Mate choice
Morphology
Sexual selection
competition
fly
morphology
sexual selection
Ceratitis capitata
Diptera
Tephritidae
Norry, F.M.
Calcagno, G.
Vera, M.T.
Manso, F.
Vilardi, J.C.
Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
topic_facet Ceratitis capitata
Courtship behavior
Lek
Mate choice
Morphology
Sexual selection
competition
fly
morphology
sexual selection
Ceratitis capitata
Diptera
Tephritidae
description Sexual selection on morphology was examined in the lek-mating fly Ceratitis capitata (Weidemann). Single-pair courtships were videotaped in small chambers for males from a laboratory strain (L males) and males from the laboratory G2 generation of a sample of wild flies (W males). Virgin females derived from the wild population were used for all observations. The time spent on each courtship behavior (pheromone calling, wing fanning, wing buzzing, copulation attempt [mounting], missed jump during attempted copulation, and stationary status) was scored. Behavior was uncorrelated with morphology, except for a negative correlation between scutellum width and missed jump in L males. A multivariate analysis revealed that copulatory success is influenced by intermale variation to attempt copulation. Stabilizing sexual selection was apparent on eye length in L males and head width in W males, but size-related traits of thorax and wings had no effect on mating success. Because this selection was independent of any possible male-male competition, intersexual selection on male morphology is implied. Sexual selection on morphology was also substantial in a field cage experiment, where virgin flies were released into a cage containing a small host tree. The results of this caged experiment were consistent with those of single-pair courtships in that head morphology was suggested as a selection target, but directional selection (decreasing the trait mean) rather than stabilizing selection was apparent. Overall, male's head morphology was suggested to be at least one of the more probable direct target of mate choice of females once at a lek. The results are thus consistent with the predominant view that female mate choice is often significant in lek-mating systems.
format JOUR
author Norry, F.M.
Calcagno, G.
Vera, M.T.
Manso, F.
Vilardi, J.C.
author_facet Norry, F.M.
Calcagno, G.
Vera, M.T.
Manso, F.
Vilardi, J.C.
author_sort Norry, F.M.
title Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
title_short Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
title_full Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
title_fullStr Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
title_full_unstemmed Sexual selection on male morphology independent of male-male competition in the Mediterranean fruit fly (Diptera: Tephritidae)
title_sort sexual selection on male morphology independent of male-male competition in the mediterranean fruit fly (diptera: tephritidae)
url http://hdl.handle.net/20.500.12110/paper_00138746_v92_n4_p571_Norry
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AT veramt sexualselectiononmalemorphologyindependentofmalemalecompetitioninthemediterraneanfruitflydipteratephritidae
AT mansof sexualselectiononmalemorphologyindependentofmalemalecompetitioninthemediterraneanfruitflydipteratephritidae
AT vilardijc sexualselectiononmalemorphologyindependentofmalemalecompetitioninthemediterraneanfruitflydipteratephritidae
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