Literaturdatenbank
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Domènech Rosell, F., Marquina, R., Soler, L., Valls, L., Fernández, M., & Aznar, F. J., et al. , Trachemys scripta: An entry way for the alien parasite neopolystoma orbiculare (monogenea) to europe. Unpublished paper presented at XII Congresso Luso Espanhol de Herpetologia.
Added by: Admin (06 Jan 2014 18:22:45 UTC) |
| Resource type: Conference Paper BibTeX citation key: DomnechRosell2012a View all bibliographic details  |
Categories: General Keywords: Emydidae, Emys orbicularis, Geoemydidae, Habitat - habitat, invasive Arten - invasive species, Mauremys leprosa, Parasiten - parasites, Schildkröten - turtles + tortoises, Südwesteuropa - South-Western Europa, Trachemys scripta Creators: Aznar, Domènech Rosell, Fernández, Gómez, Marquina, Soler, Tarrazona, Valls Collection: XII Congresso Luso Espanhol de Herpetologia |
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| Abstract |
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With the significant increase of introduced species over recent decades, comprehensive taxonomic studies of their symbionts (commensal, parasites) have become necessary because symbionts can generate a substantial impact (even higher than that from their hosts) in the colonized ecosystems. In this study we report, for the first time in the Palaearctic region, an alien species of monogenean, Neopolystoma orbiculare (fam. Polystomatidae), infecting the invasive freshwater turtle Trachemys scripta. This parasite has a Nearctic distribution and typically occurs in the urinary bladder of T. scripta in its native habitat. During the parasitological examination of 54 individuals of T. scripta from 5 locatities in Valencia (Spain) following a latitudinal gradient, 7 individuals of N. orbiculare were collected in the bladder and cloaca of 5 hosts (Prevalence: 10.9% : , mean intensity: 1.4 ). Neopolystoma orbiculare can be distinguished from other congeneric species by bearing a crown of 16 hooks in the genital atrium, the lack of hamuli, and 16 marginal hooks in the haptor, with a particular shape and arrangement. The occurrence of gravid adults in just one locality (Marjal de La Safor, Gandia) might suggest that colonization in this region is recent. We postulate that the parasite would have survived the transport, period of captivity and subsequent release to the wild thanks to both its direct life cycle (which requires a freshwater turtle as single host) and the ability to survive within freshwater turtles for long periods. A key question is whether N. orbiculare could infect species of native turtles (Emys orbicularis and Mauremys leprosa) and, if so, whether it could provoke harmful effects in these species. This process could play a significant role in the invasion process of T. scripta.
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