Boletín de la RSEHN. Sección Biológica

La capacidad de dispersión es un rasgo clave en las estrategias vitales de los organismos, que en los odonatos suele deberse al vuelo de los individuos adultos. En este estudio se analiza, mediante técnicas de marcado-recaptura, una población del léstido Sympecma fusca, habitante de una charca temporal en el NE de la Península Ibérica. Se marcaron 236 ejemplares, que abandonaron la charca al poco de emerger y no retornaron a ella ni a sus alrededores, ni siquiera para la hibernación. Esto sugiere una ausencia total de filopatría en esta especie, que se discute y contrasta con lo observado en otras especies de léstidos. La proporción sexual en la emergencia no difirió significativamente de 1:1 y ambos sexos se dispersaron por igual.

Dispersal is a life-history key trait, which is usually due to the adult flight in Odonata. A population of the lestid damselfly Sympecma fusca, inhabiting a temporary pond in the NE of Iberian Peninsula, was analysed by mark-recapture methods. 236 individuals (101 males, 135 females) were marked between July and October of 2000. Sex ratio at emergence was not significantly different from 1:1 and both sexes dispersed equally. They left the pond upon emergence, and returned neither to it nor its surrounding area in summer. Any marked individual was found neither in the nearest ponds (< 3 km) nor in other ponds of the shire. Overwintering individuals were observed amid the vegetation at pond edge, however there was not any marked one among them. This suggests a total absence of philopatry in this species, unlike behaviour observed in other lestid damselflies, what is discused.