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The effect of foraging and ontogeny on the prevalence and intensity of the invasive parasite Anguillicola crassus in the European eel Anguilla anguilla

Barry, J; Newton, M; Dodd, J A; Evans, D; Newton, J; Adams, C E

Authors

J Barry

M Newton

D Evans

J Newton

C E Adams



Abstract

Infection patterns of the invasive Anguillicola crassus nematode were investigated in a population of the European eel Anguilla anguilla where parasite invasion is very recent, Loch Lomond, Scotland. Intensity levels of the parasite were associated with differences in fish ontogeny and trophic ecology. Although eels foraged on both fish and invertebrates, individuals which were smaller and fed on invertebrates (>70% contribution to diet) were found to contain a greater number of swim bladder parasites compared to larger eel with a predominance of fish (>60% contribution) in their diet. Within affected fish, a significant negative relationship was found between fish length and parasite intensity, with smaller individuals having higher parasite intensity than larger individuals. This study indicates that food intake and infection risk are linked in this recently infected host–parasite system. From a management perspective increasing our understanding of how infection intensity and repeated exposure is linked to resource use in an ecosystem is important for the future management of this endangered species in Europe.

Journal Article Type Article
Acceptance Date Nov 10, 2016
Online Publication Date Jan 13, 2017
Publication Date 2017-09
Deposit Date Sep 3, 2019
Publicly Available Date Sep 3, 2019
Journal Journal of Fish Diseases
Print ISSN 0140-7775
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 40
Issue 9
Pages 1213-1222
DOI https://doi.org/10.1111/jfd.12596
Keywords Anguillicola crassus, eel, foraging, ontogeny, parasite prevalence
Public URL http://researchrepository.napier.ac.uk/Output/1802890

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The Effect Of Foraging And Ontogeny On The Prevalence And Intensity Of The Invasive Parasite Anguillicola Crassus In The European Eel Anguilla Anguilla (297 Kb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.





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