Introduced species and their missing parasites

@article{Torchin2003IntroducedSA,
  title={Introduced species and their missing parasites},
  author={Mark E Torchin and Kevin D. Lafferty and Andrew P. Dobson and Valerie J. McKenzie and Armand M. Kuris},
  journal={Nature},
  year={2003},
  volume={421},
  pages={628-630}
}
Damage caused by introduced species results from the high population densities and large body sizes that they attain in their new location. Escape from the effects of natural enemies is a frequent explanation given for the success of introduced species. Because some parasites can reduce host density and decrease body size, an invader that leaves parasites behind and encounters few new parasites can experience a demographic release and become a pest. To test whether introduced species are less… 
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