Predator-prey interactions between shell-boring beetle larvae and rock-dwelling land snails

PLoS One. 2014 Jun 25;9(6):e100366. doi: 10.1371/journal.pone.0100366. eCollection 2014.

Abstract

Drilus beetle larvae (Coleoptera: Elateridae) are specialized predators of land snails. Here, we describe various aspects of the predator-prey interactions between multiple Drilus species attacking multiple Albinaria (Gastropoda: Clausiliidae) species in Greece. We observe that Drilus species may be facultative or obligate Albinaria-specialists. We map geographically varying predation rates in Crete, where on average 24% of empty shells carry fatal Drilus bore holes. We also provide first-hand observations and video-footage of prey entry and exit strategies of the Drilus larvae, and evaluate the potential mutual evolutionary impacts. We find limited evidence for an effect of shell features and snail behavioral traits on inter- and intra-specifically differing predation rates. We also find that Drilus predators adjust their predation behavior based on specific shell traits of the prey. In conclusion, we suggest that, with these baseline data, this interesting predator-prey system will be available for further, detailed more evolutionary ecology studies.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biodiversity
  • Coleoptera*
  • Evolution, Molecular
  • Greece
  • Larva
  • Predatory Behavior*
  • Snails*

Grants and funding

Funding for this study came from NWO-ALW (grant 819.01.012, awarded to M.S.), the Jan-Joost ter Pelkwijkfonds (awarded to E.B, R.S., and R.H.), the Uyttenboogaart-Eliasen Fonds (awarded to M.S.), the Kees Bakker award (awarded to R.H.), and a doctoral fellowship to F.W.-S. from the Evangelisches Studienwerk. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.