IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
The role of sex and mating status in the expansion process of Arhopalus rusticus - an exotic cerambycid in Argentina
Autor/es:
GRILLI M.P,; FACHINETTI, R
Revista:
ENVIRONMENTAL ENTOMOLOGY
Editorial:
ENTOMOLOGICAL SOC AMER
Referencias:
Lugar: Lanham; Año: 2017 p. 714 - 721
ISSN:
0046-225X
Resumen:
In Córdoba province, central Argentina, there is an area of introduced pine trees. In 15 2006, an invading Cerambycid, Arhoplus rusticus, was detected in this region for the 16 first time. The species has since expanded its range until it now occupies the whole area. 17 A. rusticus is a common species of cerambycid in pine forests of the northern 18 hemisphere. In this paper, we analyze how sex and mating status affects flight 19 performance and the potential distribution of this species. The study was performed 20 with individuals collected from introduced pine forests in the center-west of Córdoba 21 Province (Argentina). The dispersal capability of Arhopalus rusticus was determined by 22 putting recently emerged mated and unmated individuals to fly in flight mills. Data of 23 pre-flight body weight, post-flight body weight, body length and elytron size were 24 obtained from the individuals that were put to fly. We found that females were bigger, 25 heavier, with longer elytra and were better flyers than males. We also found statistical 26 differences between dispersal potential depending on the mating status. Mated 27 individuals flew faster and longer distances than unmated ones, and also consumed a 28 smaller fraction of their body weight. A positive relationship was observed between 29 elytra size and flight speed. A map of males? and females? dispersal distances was 30 produced for the study region using the adjusted dispersal distance distribution of males 31 and females. The flight performance of males and females showed that, as females 32 disperse after copulation, they increase the chances of establishing the species in 33 unoccupied areas.