Parasite interactions in the bioturbator Upogebia pusilla (Decapoda: Gebiidae): a case of amensalism? - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Marine Biology Année : 2017

Parasite interactions in the bioturbator Upogebia pusilla (Decapoda: Gebiidae): a case of amensalism?

Résumé

The mud shrimp Upogebia pusilla is a deep-burrowing bioturbator widespread along the Northeast Atlantic and Mediterranean coasts, where it is recognized as an ecosystem engineer. Parasitism is an important factor impacting such species’ activities, and thus ecosystem functioning. At least two parasite species occur in U. pusilla: the bopyrid isopod Gyge branchialis and an undescribed trematode. This study, carried out in Arcachon Bay, France (44°40′N, 1°10′W), over 2 years (2014–2015), had two goals: (1) to identify the trematode occurring in U. pusilla and (2) to assess the interactions between the two parasites within their host. Using molecular techniques, the trematode was identified as Maritrema sp. (Microphallidae). Monthly samples taken over 2 years at a single site, and a ten-site spatial survey in June 2014 showed that there was a negative association in the occurrence of the two parasites in their host over time and amongst sites: bopyrid-infested mud shrimp harbored lower trematode infections compared to bopyrid-free individuals. In addition, the abundance of trematodes was lower in the bopyrid-infested gill compared to the uninfested gill of bopyrid-infested individuals. It suggests that G. branchialis interferes with Maritrema sp. establishment in the mud shrimp. Conversely, the trematode appeared not to have a negative effect on bopyrid presence. The reduction of Maritrema sp. infection by G. branchialis is mainly due to the alteration of U. pusilla fitness (indirect interaction), and to a lesser extent, to overlap of parasites’ niches (direct interaction). Accordingly, interactions between these two parasites can be classified as amensalism.
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Dates et versions

hal-04205959 , version 1 (13-09-2023)

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Annabelle Dairain, Patrice Gonzalez, Alexia Legeay, Olivier Maire, Guillemine Daffe, et al.. Parasite interactions in the bioturbator Upogebia pusilla (Decapoda: Gebiidae): a case of amensalism?. Marine Biology, 2017, 164 (10), ⟨10.1007/s00227-017-3229-3⟩. ⟨hal-04205959⟩

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