Testing the enemy release hypothesis: trematode parasites in the non-indigenous Manila clam Ruditapes philippinarum

Dang, C., de Montaudouin, X., Bald, J., Jude, F., Raymond, N., Lanceleur, L., Paul-Pont, I. and Caill-Milly, N. (2009) Testing the enemy release hypothesis: trematode parasites in the non-indigenous Manila clam Ruditapes philippinarum. Hydrobiologia, 630 1: 139-148. doi:10.1007/s10750-009-9786-9

Author Dang, C.
de Montaudouin, X.
Bald, J.
Jude, F.
Raymond, N.
Lanceleur, L.
Paul-Pont, I.
Caill-Milly, N.
Title Testing the enemy release hypothesis: trematode parasites in the non-indigenous Manila clam Ruditapes philippinarum
Journal name Hydrobiologia   Check publisher's open access policy
ISSN 0018-8158
Publication date 2009-09
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s10750-009-9786-9
Volume 630
Issue 1
Start page 139
End page 148
Total pages 10
Place of publication Dordrecht, The Netherlands
Publisher Springer
Collection year 2010
Language eng
Formatted abstract
The present study tested the 'Enemy Release Hypothesis' (ERH) which states that the success of an introduced species is related to the scarcity of natural enemies in the introduced range compared with the native range. Digeneans are dominant macroparasites of molluscs; therefore, the interaction between R. philippinarum and these parasites was ideal for investigation. A two-year monitoring in Arcachon Bay (SW France) was performed to estimate digenean loads in R. philippinarum and in three infaunal native bivalves (R. decussatus, Paphia aurea, Cerastoderma edule). A laboratory experiment allowed comparison of infection success among these bivalves (except P. aurea) by generalist digenean larvae (Himasthla elongata cercariae). R. philippinarum digenean abundance in Arcachon Bay was much lower than in native bivalves, with values depending on species, sites and time. Similarly, mean digenean species richness per host individual was always lower in R. philippinarum than in sympatric bivalves. A comparison of digenean metacercariae abundance between R. decussatus and C. edule in Mundaka Estuary (Spain) showed that both species had similar digenean loads but that R. decussatus was depleted in digenean species encysting in host tissues (the non-gymnophallid species). Experimental infection confirmed that the two species of the genus Ruditapes (and not R. philippinarum only) were resistant to encysting digeneans, with an infection success 3-5 times lower than that of C. edule. The lack of infection that was observed in the field would therefore be the consequence of a tissue barrier, R. philippinarum epithelium being too tough for cercariae penetration. Concordantly, according to the literature, digenean infection in the native range of R. philippinarum is also low. Consequently, the ERH, as an explanation for R. philippinarum success in Europe, is not totally consistent in the case of digenean trematodes as enemies, R. philippinarum hosting low load of digeneans in its native as well as colonized range.
Keyword Ruditapes philippinarum
Non indigenous species
Arcachon Bay
Mundaka Estuary
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 24 Jul 2013, 15:15:25 EST by Dr Cecile Dang on behalf of School of Biological Sciences