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No. de sistema: 000006400

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 150923m20159999nyumr^p^o^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| nyu
245 0 0 a| Pheromone-mediated mate location and discrimination by two syntopic sibling species of dendroctonus bark beetles in Chiapas, Mexico
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| Where their geographic and host ranges overlap, sibling species of tree-killing bark beetles may simultaneously attack and reproduce on the same hosts. However, sustainability of these potentially mutually beneficial associations demands effective prezygotic reproductive isolation mechanisms between the interacting species. The pine bark beetle, Dendroctonus frontalis Zimmermann, is syntopic in the Central American region with a recently described sibling species, Dendroctonus mesoamericanus Armendáriz-Toledano and Sullivan, but mechanisms for their reproductive isolation are uncertain. We investigated whether semiochemicals mediate species discrimination by mate-seeking males of both species. In olfactometer bioassays, walking males of both species strongly preferred odors from gallery entrances of conspecific females. Coupled gas chromatography-electroantennographic detection and gas chromatography-mass spectrometry isolated 16 olfactory stimulants for males in these odors, but only two, ipsdienol and endo-brevicomin (both from D. mesoamericanus females), differed in quantity in female-associated odors between the species. In olfactometer bioassays, with 10, 1, or 0.1 female entrance equivalents of synthetic semiochemicals, the combination of ipsdienol and endo-brevicomin inhibited responses of male D. frontalis and enhanced responses of male D. mesoamericanus to two compounds associated with female entrances of both species (the pheromone component frontalin and host odor α-pinene). We conclude that ipsdienol and endo-brevicomin, pheromone components produced by females of just one of the two species (D. mesoamericanus), mediate interspecific mate discrimination by males of both species and provide an apparently symmetrical reproductive isolation mechanism.
530 _ _ a| Disponible en línea
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Escarabajos de la corteza
650 _ 4 a| Dendroctonus frontalis
650 _ 4 a| Dendroctonus mesoamericanus
650 _ 4 a| Feromonas de insectos
651 _ 4 a| Parque Nacional Lagunas de Montebello (Chiapas, México)
700 1 _ a| Niño Domínguez, Alicia
e| autora
700 1 _ a| Sullivan, Brian T.
e| autor
n| 57195957216
700 1 _ a| López Urbina, José Higinio
e| autor
700 1 _ a| Macías Sámano, J. E.
c| Doctor
e| autor
773 0 _
t| Journal of Chemical Ecology
g| Vol. 41, no. 8 (August 2015), p. 746-756
x| 1573-1561
901 _ _ a| Artículo con arbitraje
902 _ _ a| GOG / MM
904 _ _ a| Septiembre 2015
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
906 _ _ a| Producción Académica ECOSUR
LNG eng
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Pheromone-mediated mate location and discrimination by two syntopic sibling species of dendroctonus bark beetles in Chiapas, Mexico
Niño Domínguez, Alicia (autora)
Sullivan, Brian T. (autor)
López Urbina, José Higinio (autor)
Macías Sámano, J. E. (autor)
Nota: Disponible en línea
Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Journal of Chemical Ecology. Vol. 41, no. 8 (August 2015), p. 746-756. ISSN: 1573-1561
No. de sistema: 6400
Tipo: - Artículo con arbitraje
PDF


Inglés

"Where their geographic and host ranges overlap, sibling species of tree-killing bark beetles may simultaneously attack and reproduce on the same hosts. However, sustainability of these potentially mutually beneficial associations demands effective prezygotic reproductive isolation mechanisms between the interacting species. The pine bark beetle, Dendroctonus frontalis Zimmermann, is syntopic in the Central American region with a recently described sibling species, Dendroctonus mesoamericanus Armendáriz-Toledano and Sullivan, but mechanisms for their reproductive isolation are uncertain. We investigated whether semiochemicals mediate species discrimination by mate-seeking males of both species. In olfactometer bioassays, walking males of both species strongly preferred odors from gallery entrances of conspecific females. Coupled gas chromatography-electroantennographic detection and gas chromatography-mass spectrometry isolated 16 olfactory stimulants for males in these odors, but only two, ipsdienol and endo-brevicomin (both from D. mesoamericanus females), differed in quantity in female-associated odors between the species. In olfactometer bioassays, with 10, 1, or 0.1 female entrance equivalents of synthetic semiochemicals, the combination of ipsdienol and endo-brevicomin inhibited responses of male D. frontalis and enhanced responses of male D. mesoamericanus to two compounds associated with female entrances of both species (the pheromone component frontalin and host odor α-pinene). We conclude that ipsdienol and endo-brevicomin, pheromone components produced by females of just one of the two species (D. mesoamericanus), mediate interspecific mate discrimination by males of both species and provide an apparently symmetrical reproductive isolation mechanism."


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