Environmental and spatial determinants of parasite communities in invasive and native freshwater fishes

Deflem, Io S.; Eeckhaut, Frederik Van Den; Vandevoorde, Mikaël; Calboli, Federico C. F.; Raeymaekers, Joost; Volckaert, Filip A. M.

doi:10.1007/s10750-021-04746-z

Cited by 6 publications

(1 citation statement)

References 108 publications

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“…With increasing body size and a cumulative increase in the total parasites, richness is expected, and this is often associated with a more diverse diet, suggesting that niche breadth potentially results in a more diverse prey community (Baia et al, 2018; Luque & Poulin, 2008). Additionally, fish that reach larger sizes may accumulate parasites as they age and therefore provide a larger surface area for the colonisation of these organisms (Deflem et al, 2022; Poulin, 2000; Poulin & Morand, 2004).…”

Section: Discussionmentioning

confidence: 99%

The occurrence of trophically transmitted parasites is influenced by the trophic level and body size of the fish host

Lehun

Silva

Michelan

et al. 2023

Ecology of Freshwater Fish

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Endoparasites that are trophically transmitted are closely intertwined and constrained by the structure of the food chain. Each fish species can be used as an intermediate or definitive host; thus, the position it occupies in the food web and the body size can be determining factors for the presence of parasites and their transmission. Considering that fish can be parasitized by larval and adult stage endoparasites and that they are exposed to a wide variety of parasite species, we used a helminth dataset from 70 fish species and tested whether the total parasite richness, larval and adult, of fish from the upper Paraná River floodplain can be explained by body size and trophic level. For the trophic level, we observed an increasing trend in the richness of larval parasites. Regarding the richness of adult parasites and the total richness, we observed an increase as a function of the body size of the host. The tropic position and body size of the fish were good predictors, indicating that the position of the host in the trophic chain can influence and determine its life cycle.

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