Escape from Parasites

  • Mark E. Torchin
  • Kevin D. Lafferty
Part of the Ecological Studies book series (ECOLSTUD, volume 204)

In betting circles, the odds-on favorite of a sporting match can depend on the health of the star players; a pulled hamstring or bad flu can determine the winner. Introduced species are often in contest with native species and their impacts are directly proportional to their demographic performance in the novel environment. Demographic performance can encompass population level parameters, such as densities, abundances, and biomass as well as individual level parameters, such as growth rate, survivorship and fecundity. One indication of an invader's demographic performance is size because individuals that grow fast or live long can become large. On average, marine invaders attain larger sizes compared to populations in their native range (Grosholz and Ruiz 2003). This increased performance, if it translates into increased standing biomass, should positively correlate with an invader's impact (Crivelli 1983). Exploring reasons for invasion success will not only accelerate our understanding of species interactions, but will strengthen our ability to manage invasions.


Natural Enemy Parasite Species Zebra Mussel Ballast Water Round Goby 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Mark E. Torchin
    • 1
  • Kevin D. Lafferty
    • 2
  1. 1.Smithsonian Tropical Research InstituteBalboaRepublic of Panama
  2. 2.U.S. Geological Survey, Western Ecological Research CenterMarine Science Institute, University of CaliforniaSanta BarbaraUSA

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