Introduced species and their missing parasites. Export

@article{Torchin2003Introduced-species-and-their-missing-parasites., abstract = {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 parasitized, we have compared the parasites of exotic species in their native and introduced ranges, using 26 host species of molluscs, crustaceans, fishes, birds, mammals, amphibians and reptiles. Here we report that the number of parasite species found in native populations is twice that found in exotic populations. In addition, introduced populations are less heavily parasitized (in terms of percentage infected) than are native populations. Reduced parasitization of introduced species has several causes, including reduced probability of the introduction of parasites with exotic species (or early extinction after host establishment), absence of other required hosts in the new location, and the host-specific limitations of native parasites adapting to new hosts.}, address = {Marine Science Institute and Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, USA. torchin@lifesci.ucsb.edu}, author = {Torchin, Mark E. and Lafferty, Kevin D. and Dobson, Andrew P. and Mckenzie, Valerie J. and Kuris, Armand M.}, citeulike-article-id = {1693491}, doi = {10.1038/nature01346}, journal = {Nature}, keywords = {adaptation, animal, animals, biological, biomass, body, constitution, dynamics, ecosystem, groupsparasitologyphysiology, host-parasite, models, parasites\_and\_pollution, parasitesisolation, physiological, population, probability, purificationphysiology, relations, species, specificity}, number = {6923}, pages = {628--630}, posted-at = {2007-09-25 18:15:32}, priority = {0}, title = {Introduced species and their missing parasites.}, volume = {421}, year = {2003} }

TY - JOUR ID - Torchin2003Introduced-species-and-their-missing-parasites. L3 - citeulike-article-id:1693491 N2 - 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 parasitized, we have compared the parasites of exotic species in their native and introduced ranges, using 26 host species of molluscs, crustaceans, fishes, birds, mammals, amphibians and reptiles. Here we report that the number of parasite species found in native populations is twice that found in exotic populations. In addition, introduced populations are less heavily parasitized (in terms of percentage infected) than are native populations. Reduced parasitization of introduced species has several causes, including reduced probability of the introduction of parasites with exotic species (or early extinction after host establishment), absence of other required hosts in the new location, and the host-specific limitations of native parasites adapting to new hosts. IS - 6923 JF - Nature AD - Marine Science Institute and Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California 93106, USA. torchin@lifesci.ucsb.edu EP - 630 TI - Introduced species and their missing parasites. VL - 421 SP - 628 KW - adaptation KW - animal KW - animals KW - biological KW - biomass KW - body KW - constitution KW - dynamics KW - ecosystem KW - groupsparasitologyphysiology KW - host-parasite KW - models KW - parasites_and_pollution KW - parasitesisolation KW - physiological KW - population KW - probability KW - purificationphysiology KW - relations KW - species KW - specificity AU - Torchin, Mark AU - Lafferty, Kevin AU - Dobson, Andrew AU - Mckenzie, Valerie AU - Kuris, Armand PY - 2003/// ER -