Publication: The European eel may tolerate multiple infections at a low biological cost
Authors
Mayo-Hernandez, Elvira ; Serrano, Emmanuel ; Peñalver, Jose ; Ruiz De Ybañez, Rocio ; Muñoz, Pilar ; García Ayala, Alfonsa
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Publisher
Cambridge University Press
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DOI
https://doi.org/10.1017/S0031182015000098
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info:eu-repo/semantics/article
Description
© 2015, Cambridge University Press. This document is made available under the CC-BY-NC 4.0 license http://creativecommons.org/licenses/by-nc /4.0/
This document is the accepted version of a published work that appeared in final form in Parasitology.
To access the final work, see DOI: https://doi.org/10.1017/S0031182015000098
Abstract
Most animals are concurrently infected with multiple parasites, and interactions among them may influence both disease dynamics and host fitness. However, the sublethal costs of parasite infections are difficult to measure and the effects of con comitant infections with multiple parasite species on individual physiology and fitness are poorly described for wild hosts.
To understand the costs of co-infection, we investigated the relationships among 189 European eel (Anguilla anguilla) from Mar Menor, parasites (richness and intensity) and eel’s ‘health status’ (fluctuant asymmetry, splenic somatic index and the scaled mass index) by partial least squares regression. We found a positive relationship with 44% of the health status variance explained by parasites. Contracaecum sp. (Nematoda: Anisakidae) was the strongest predictor vari able (44·72%) followed by Bucephalus anguillae (Platyhelminthes: Bucephalidae), (29·26%), considered the two most rel evant parasites in the analysis. Subsequently, 15·67 and 12·01% of the response variables block were explained by parasite richness and Deropristis inflata (Platyhelminthes: Deropristiidae), respectively. Thus, the presence of multiple parasitic exposures with little effect on condition, strongly suggests that eels from Mar Menor tolerate multiparasitism
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