Prey naiveté - the failure of prey to recognize novel predators as threats - is thought to exacerbate the impact that exotic predators exert on prey populations. Prey naiveté varies under the influence of eco-evolutionary mediating factors, such as biogeographic isolation and prey adaptation, although an overall quantification of their influence is lacking. We conducted a global meta-analysis to test the effects of several hypothesized mediating factors on the expression of prey naiveté. Prey were overall naive towards exotic predators in marine and freshwater systems but not in terrestrial systems. Prey naiveté was most pronounced towards exotic predators that did not have native congeneric relatives in the recipient community. Time since introduction was relevant, as prey naiveté declined with the number of generations since introduction; on average, around 200 generations may be required to erode naiveté sufficiently for prey to display antipredator behaviour towards exotic predators. Given that exotic predators are a major cause of extinction, the global predictors and trends of prey naiveté presented here can inform efforts to meet conservation targets.
|Number of pages||10|
|Journal||Proceedings of the Royal Society B: Biological Sciences|
|Early online date||03 Jun 2020|
|Publication status||Published - 10 Jun 2020|
Bibliographical noteFunding Information:
Data accessibility. Data available from the Dryad Digital Repository: https://doi.org/10.5061/dryad.gqnk98sjh . Code availability statement: the R script used in this manuscript is deposited here https://github.com/antongamazo/Determinants-of-prey-naivete. Authors contributions. A.A. and N.R.G. conceived the study, A.A., N.R.G., A.R., and J.T.A.D. designed the study, A.A. collected data, A.A. and N.R.G. performed the analyses, A.A. wrote the first draft of the manuscript with substantial input from all authors, A.A., A.R., and N.R.G. contributed extensively to revisions, and all authors approved it for publication. Competing interests. We declare we have no competing interests. Funding. The Natural Environment Research Council (NERC) and the Natural Sciences and Engineering Research Council of Canada (NSERC) supported this study with grants to J.T.A.D. and A.R., respectively. Acknowledgements. We thank the School of Biological Sciences at Queen’s University Belfast, the Queen’s University Marine Laboratory, Julia Sigwart, Christine Maggs, and Bernie Curran for logistical support and Daniel Barrios-O’Neill for providing valuable feedback on an early draft of the manuscript.
© 2020 The Author(s).
Copyright 2020 Elsevier B.V., All rights reserved.
- invasive species
- naive prey
- predator archetype
- prey behaviour
- prey naiveté
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Immunology and Microbiology(all)
- Environmental Science(all)
- Agricultural and Biological Sciences(all)