Components influencing parasitism by Dadaytrema oxycephala (Digenea: Cladorchiidae) in Neotropical fish

Cavalcanti, Lidiany Doreto; Gouveia, Élida Jerônimo; Michelan, Gabriela; Lehun, Atsler Luana; Silva, João Otávio Santos; Hasuike, Wagner Toshio; Russo, Márcia Regina; Takemoto, Ricardo Massato

doi:10.1007/s00436-023-07822-6

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“…Many studies highlight host body size as a predictor of parasite communities (e.g., Costa et al, 2021; Lizama et al, 2005; Poulin, 1997; Poulin et al, 2011), as it is expected that the larger the host species, the greater its ability to support a greater abundance and diversity of parasites (Lehun et al, 2023; Poulin, 1999). Other studies also highlight the role of the host's diet and trophic level (e.g., Cavalcanti et al, 2023; Lehun et al, 2023; Muñoz et al, 2006; Poulin & Leung, 2011), influencing mainly endoparasites, which can be acquired through food ingestion and their transmission occurs along the trophic chain, from one level to another (Benesh et al, 2014; Poulin, 1995), migratory behavior, considering that migratory species, when dispersed in different environments, can acquire parasites from several regions, while sedentary species are more restricted to local parasites (Criscione et al, 2006; Jacobson et al, 2019; Poulin & Angeli Dutra, 2021; Shaw et al, 2018), and habitat use (e.g., Campbell et al, 1980; Cavalcanti et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

The functional traits of host fish can act as good predictors for parasite composition in a neotropical floodplain

Lehun,

Muniz,

Silva

et al. 2023

Journal of Fish Biology

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Parasite diversity can be influenced by the interaction of environmental factors and host traits, however, understanding which traits can be decisive for the establishment of the parasite can provide subsidies for a better understanding of the parasite‐host relationship. In this study, we investigated whether functional traits, diet, and host phylogeny can predict the similarity of endoparasite composition of a fish assemblage in a Brazilian floodplain. Of the three evaluated components, the host's diet was the factor that presented the greatest influence on the composition and similarity of endoparasites, demonstrating the highest percentage of explanation. The functional traits and phylogeny, despite presenting significant values (unique effect and global effect), demonstrated low explainability in the composition of endoparasites. When analyzing the joint effects, all components showed significant influences. Hosts that live in the same environment that are phylogenetically related and that have a similar ecology, have a certain degree of homogeneity in their parasite assemblages and, because they are endoparasites (which are acquired trophically along the chain), diet is the main driver of parasite richness and similarity. Overall, host traits can be one of the main determinants of parasite composition, so studies that address the functional traits of the host provide a representation of local diversity and define the possible patterns of these parasite communities.This article is protected by copyright. All rights reserved.

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