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Journal Articles Science of the Total Environment Year : 2022

Acanthocephalan parasites reflect ecological status of freshwater ecosystem

Les parasites acanthocéphales reflètent le statut écologique des écosystèmes d'eau douce


Acanthocephalans’ position in food webs, in close interaction with free-living species, could provide valuable information about freshwater ecosystem health through the viability of the parasites’ host populations. We explored Pomphorhynchus laevis cystacanths’ and adults’ intensities of infection, and the prevalence of infected hosts respectively in their Gammarus pulex intermediate hosts and Squalius cephalus definitive hosts in a Mediterranean river. First, we analysed the relationship between P. laevis intensity of infection, its two hosts populations and the other acanthocephalan species found (Pomphorhynchus tereticollis and Polymorphus minutus). Second, we characterised the influence of bacteriological, physicochemical and biological water parameters on these acanthocephalans, and their intermediate and definitive hosts. This research highlights that P. laevis infection was closely related to their two preferential hosts population in the river. Moreover, P. laevis intensity of infection was positively correlated with organic pollution in the river but negatively correlated with biodiversity and with ecological indexes of quality. Pomphorhynchus laevis could thus benefit from moderate freshwater pollution, which promotes their tolerant intermediate and definitive hosts.
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Dates and versions

hal-03691130 , version 1 (08-06-2022)


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Hadrien Fanton, Evelyne Franquet, Maxime Logez, Laurent Cavalli, Nicolas Kaldonski. Acanthocephalan parasites reflect ecological status of freshwater ecosystem. Science of the Total Environment, 2022, 838 (3), pp.156091. ⟨10.1016/j.scitotenv.2022.156091⟩. ⟨hal-03691130⟩
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