title: Factors influencing the release of volatiles in Anastrepha obliqua males (Diptera: Tephritidae).
abstract: During sexual signaling, males of Anastrepha obliqua (Macquart) form leks and attract females by producing sounds and releasing volatile compounds. The objective of this study was to investigate the influence time of time of day, age, irradiation, mating status, and the presence of host fruit on the release of volatile components by laboratory-reared A. obliqua males. A. obliqua males released four compounds identified by gas chromatography coupled with mass spectrometry (GC-MS) as (E,E)-alpha-farnesene, (Z,E)-alpha-farnesene, (Z)-3-nonenol, and a farnesene isomer during calling behavior. Although males released volatiles during the entire day, the amount of volatiles was higher in the early morning and afternoon hours. Males began to emit volatiles when they were 6 d old, but only the amount of (Z)-3-nonenol was affected by age. Irradiation of flies with gamma rays from a 60Co source at a dose rate of 80 [corrected] Gy significantly reduced the amount of volatiles released during calling behavior. The amount of volatiles was lower in recently mated males than virgin males. However, there were no significant differences between virgin males and males 24 h after mating. The presence of host fruit did not affect the amount of volatiles compared with the control.
authors.affiliation: Departamento de Entomología Tropical, El Colegio de la Frontera Sur, Tapachula, Chiapas CP 30700, México. glopezg8@hotmail.com
authors.forename: Guillermo
authors.initials: G
authors.lastname: López-Guillén
authors.forename: Leopoldo
authors.initials: L
authors.lastname: Cruz-López
authors.forename: Edi A
authors.initials: EA
authors.lastname: Malo
authors.forename: Hector
authors.initials: H
authors.lastname: González-Hernández
authors.forename: Celina Llanderal
authors.initials: CL
authors.lastname: Cazares
authors.forename: José
authors.initials: J
authors.lastname: López-Collado
authors.forename: Jorge
authors.initials: J
authors.lastname: Toledo
authors.forename: Julio C
authors.initials: JC
authors.lastname: Rojas
mesh_terms: D000367:Age Factors; D000447:Aldehydes / Q000737:chemistry / Q000378:metabolism; D027926:Anacardiaceae / Q000254:growth & development; D000819:Animal Communication; D000818:Animals; D005260:Female; D005638:Fruit; D008401:Gas Chromatography-Mass Spectrometry; D007536:Isomerism; D008297:Male; D012717:Sesquiterpenes / Q000737:chemistry / Q000378:metabolism; D012726:Sexual Behavior, Animal; D033621:Tephritidae / Q000378:metabolism / Q000502:physiology* / Q000528:radiation effects; D013997:Time Factors; D014835:Volatilization
chemical_list: D000447:Aldehydes; D012717:Sesquiterpenes; C080589:3-nonenal; C062672:alpha-farnesene