Factors influencing the release of volatiles in Anastrepha obliqua males (Diptera: Tephritidae).
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.
López-Guillén
Guillermo
G
Departamento de Entomología Tropical, El Colegio de la Frontera Sur, Tapachula, Chiapas CP 30700, México. glopezg8@hotmail.com
Cruz-López
Leopoldo
L
Malo
Edi A
EA
González-Hernández
Hector
H
Cazares
Celina Llanderal
CL
López-Collado
José
J
Toledo
Jorge
J
Rojas
Julio C
JC
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
D000447:Aldehydes; D012717:Sesquiterpenes; C080589:3-nonenal; C062672:alpha-farnesene