Abstract

Shell crushing resistance of alien and native thiarid gastropods to predatory crabs in South Africa

Highlights

  • Interspecific interactions, such as predation, can affect the invasion success of alien species

  • The body whorl shell thickness of M. tuberculata snails used in the study was significantly different from that of T. granifera snails (ANCOVA: F1,50 = 32.91, P < 0.001; Figure 2a)

  • Tarebia granifera shells resisted an average crushing force of 100 N ± 6 SE, while M. tuberculata only resisted an average of 31 N ± 4 SE

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Summary

Introduction

Interspecific interactions, such as predation, can affect the invasion success of alien species (see MacNeil et al 2013). Native predators can affect the success of invasions by feeding less on the alien species and more on the native competitors (Shinen et al 2009; Lopez et al 2010). To address how predation may affect the invasion process, the strength of interactions between native predators and alien species, as well as their native competitors and native prey, must be determined. This information will provide evidence for whether predator-prey interactions can control an alien invasive population (Grason and Miner 2012; Macneil et al 2013)

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