Mating before host colonization: a common trait in outbreeding Scolytinae, potentially linked to invasiveness

• Autores: Dacquin, Pauline; Barnes, Brittany F.; Caiti, Emilio; Corley, Juan Carlos; Deganutti, Luca; Faccoli, Massimo; Gandhi, Kamal J.K.; Garcia, André; Grodzki, Wojciech; Jactel, Hervé; Inward, Daegan; Knížek, Miloš; Lantschner, Maria Victoria; Lakatos, Ferenc; de Pletincx, Nathan Lecocq; Meurisse, Nicolas; Nikolov, Christo; Pugh, Andrew; Riggins, John J.; Aron, Serge; Grégoire, Jean-Claude
• Año de publicación: 2025
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Entomologia Generalis 45 (2) : 391-399. (April 2025)
• Materia: Plagas de Plantas; Plagas Forestales; Sistema de Apareamiento; Aptitud Colonizadora; Especie Invasiva; Plant Pests; Scolytidae; Forest Pests; Mating Systems; Colonizing Ability; Invasive Species
• Institución: Instituto Nacional de Tecnología Agropecuaria

Little is known about the influence of mating strategies that could potentially facilitate the colonization of new hosts in outbreeding species of the weevil subfamily Scolytinae. Individuals typically emerge from their host tree, disperse, and then mate with unrelated conspecifics in a new host where the females establish maternal galleries. Yet, in several species commonly classified as outbreeding, females have been found already mated before host colonization. Precolonization mating provides female with a sperm supply before they find a new host and allows them to establish a maternal gallery on their own. We compared the proportion of females mated before host colonization across 18 European and four American outbreeding Scolytinae species using a phylogenetically controlled analysis. To this end, we determined whether females caught in the spring had sperm in their spermathecae. We found that a proportion of females (range: 16–100%) mated before host colonization in all 22 species. Moreover, this trait was biased, although not significantly, toward invasiveness. Species known to have established outside their native range (Scolytinae with an Invasion History – SIH) displayed a higher proportion of females mated before host colonization than did species restricted to their native range (non-SIH). In Hylurgus ligniperda (Fabricius), a Palearctic species currently present across the globe, the proportions of females mated before host colonization reach 90% in the species’ native range and up to 99% in its nonnative range (Argentina and New Zealand). Overall, these results show that precolonization mating is widespread among the Scolytinae. This trait could enhance the invasive capacities of outbreeding species by allowing females to establish a maternal gallery independently of any male during colonization, thus facilitating the establishment and spread of species introduced in new geographical areas.
EEA Bariloche
Fil: Dacquin, Pauline. Université Libre de Bruxelles. Evolutionary Biology & Ecology unit (EBE); Bélgica
Fil: Barnes, Brittany F. University of Georgia. Warnell School of Forestry and Natural Resources; Estados Unidos
Fil: Caiti, Emilio. Université Libre de Bruxelles. Evolutionary Biology & Ecology unit (EBE); Bélgica
Fil: Corley, Juan Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Corley, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Deganutti, Luca. University of Padua. Department of Agronomy, Food, Natural Resources, Animals and the Environment; Italia
Fil: Faccoli, Massimo. University of Padua. Department of Agronomy, Food, Natural Resources, Animals and the Environment; Italia
Fil: Gandhi, Kamal J.K. University of Georgia. Warnell School of Forestry and Natural Resources; Estados Unidos
Fil: Garcia, André. University of Lisbon. School of Agriculture. Forest Research Centre; Portugal
Fil: Grodzki, Wojciech. Forest Research Institute. Department of Mountain Forests; Polonia
Fil: Jactel, Hervé. INRAE, University of Bordeaux. INRAE; Francia
Fil: Inward, Daegan. Alice Holt Research Station. Forest Research; Reino Unido
Fil: Knížek, Miloš. Forestry and Game Management Research Institute; República Checa
Fil: Lantschner, Maria Victoria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Lantschner, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Lakatos, Ferenc. University of Sopron; Hungría
Fil: de Pletincx, Nathan Lecocq. Université Libre de Bruxelles. Evolutionary Biology & Ecology unit (EBE); Bélgica
Fil: Meurisse, Nicolas. Scion (New Zealand Forest Research Institute); Nueva Zelanda
Fil: Nikolov, Christo. Forest Research Institute. National Forest Centre; Eslovaquia
Fil: Pugh, Andrew. Scion (New Zealand Forest Research Institute); Nueva Zelanda
Fil: Riggins, John J. Mississippi State University. Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology; Estados Unidos
Fil: Aron, Serge. Université Libre de Bruxelles. Evolutionary Biology & Ecology unit (EBE); Bélgica
Fil: Grégoire, Jean-Claude. Université Libre de Bruxelles. Spatial Epidemiology Lab (SpELL); Bélgica