Jacobs Journal of Entomology and Zoological Studies

Selective Oviposition of a Natural Population of Drosophila ananassae

Published on: 2018-05-29

Abstract

An important and complex adaptive behavior that influences the speciation potential of the populations is the selection of the most suitable site for oviposition. However, the mechanisms underlying this process remain as a subject of matter. In the present study, the male influence on the selection for oviposition site was evaluated in a natural population of Drosophila ananassae from Laguna Verde, Veracruz, Mexico. The females collected in nature were established and analyzed as isofemale (IF) line. Females from each IF were allowed to lay eggs in three types of medium: unconditioned medium (UM), conditioned tracked by females medium (TF) and conditioned tracked by males medium (TM). The number of eggs laid per female was counted every 24 h for ten consecutive days. Two types of IF’s where found: (a) high and (b) low fecundity. Results showed a strong preference to lay eggs on TM for both types of IF, but the number of eggs laid by low fecundity IF’s was triplicated, and for high fecundity IF it was doubled compared with the control. No differences were found in egg-to-adult survival between eggs laid in the different mediums.

Keywords

Drosophila ananassae; Fecundity; Oviposition; Egg-laying site; Egg-to-adult-viability; Isofemale; 9-tricosene