Naturwissenschaften

, Volume 96, Issue 10, pp 1147–1156

A morphological and life history comparison between desert populations of a sit-and-pursue antlion, in reference to a co-occurring pit-building antlion

ORIGINAL PAPER
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Abstract

Although most antlion species do not construct pits, the vast majority of studies on antlions focused on pit-building species. We report here on a transplant experiment aiming to test for morphological and life history differences between two desert populations of a sit-and-pursue antlion species, Lopezus fedtschenkoi (Neuroptera: Myrmeleontidae), originating from habitats, which mainly differ in plant cover and productivity. We raised the antlion larvae in environmental chambers simulating either hyper-arid or Mediterranean climate. We found significant differences in the morphology and life history of L. fedtschenkoi larvae between the two populations. For example, the larvae originating from the more productive habitat pupated faster and had a higher growth rate. In agreement with the temperature–size rule, antlions reached higher final mass in the colder Mediterranean climate and exhibited a higher growth rate, but there was no difference in their developmental time. Observed differences in morphology between populations as well as those triggered by climate growing conditions could be explained by differences in size allometry. We also provide a quantitative description of the allometric growth axis, based on 12 morphological traits. Comparing the responses of L. fedtschenkoi with those observed in a co-occurring pit-building antlion indicated that there were neither shape differences that are independent of size nor was there a difference in the plasticity level between the two species.

Keywords

Foraging mode Myrmeleontidae Reaction norm Temperature Transplant experiment 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Inon Scharf
    • 1
  • Ido Filin
    • 1
    • 2
  • Aziz Subach
    • 1
  • Ofer Ovadia
    • 1
  1. 1.Department of Life SciencesBen-Gurion University of the NegevBeer-ShevaIsrael
  2. 2.Department of Mathematics and StatisticsUniversity of HelsinkiHelsinkiFinland

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