Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ?
Quantifying the fitness cost that parasites impose on wild hosts is a challenging task, because the epidemiological history of field-sampled hosts is often unknown. In this study, we used an internal marker of the parasite pressure on individual hosts to evaluate the costs of parasitism with respect...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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2013
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Online Access: | http://dx.doi.org/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2012.2916 |
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crroyalsociety:10.1098/rspb.2012.2916 2024-06-02T07:55:10+00:00 Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? Lefebvre, François Fazio, Géraldine Mounaix, Béatrice Crivelli, Alain J. 2013 http://dx.doi.org/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2012.2916 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 280, issue 1754, page 20122916 ISSN 0962-8452 1471-2954 journal-article 2013 crroyalsociety https://doi.org/10.1098/rspb.2012.2916 2024-05-07T14:16:16Z Quantifying the fitness cost that parasites impose on wild hosts is a challenging task, because the epidemiological history of field-sampled hosts is often unknown. In this study, we used an internal marker of the parasite pressure on individual hosts to evaluate the costs of parasitism with respect to host body condition, size increase and reproductive potential of field-collected animals for which we also determined individual age. In our investigated system, the European eel Anguilla anguilla and the parasitic invader Anguillicoloides crassus , high virulence and severe impacts are expected because the host lacks an adaptive immune response. We demonstrated a nonlinear relationship between the severity of damage to the affected organ (i.e. the swimbladder, our internal marker) and parasite abundance and biomass, thus showing that the use of classical epidemiological parameters was not relevant here. Surprisingly, we found that the most severely affected eels (with damaged swimbladder) had greater body length and mass (+11% and +41%, respectively), than unaffected eels of same age. We discuss mechanisms that could explain this finding and other counterintuitive results in this host–parasite system, and highlight the likely importance of host panmixia in generating great inter-individual variability in growth potential and infection risk. Under that scenario, the most active foragers would not only have the greatest size increase, but also the highest probability of becoming repeatedly infected—via trophic parasite transmission—during their continental life. Article in Journal/Newspaper Anguilla anguilla The Royal Society Proceedings of the Royal Society B: Biological Sciences 280 1754 20122916 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Quantifying the fitness cost that parasites impose on wild hosts is a challenging task, because the epidemiological history of field-sampled hosts is often unknown. In this study, we used an internal marker of the parasite pressure on individual hosts to evaluate the costs of parasitism with respect to host body condition, size increase and reproductive potential of field-collected animals for which we also determined individual age. In our investigated system, the European eel Anguilla anguilla and the parasitic invader Anguillicoloides crassus , high virulence and severe impacts are expected because the host lacks an adaptive immune response. We demonstrated a nonlinear relationship between the severity of damage to the affected organ (i.e. the swimbladder, our internal marker) and parasite abundance and biomass, thus showing that the use of classical epidemiological parameters was not relevant here. Surprisingly, we found that the most severely affected eels (with damaged swimbladder) had greater body length and mass (+11% and +41%, respectively), than unaffected eels of same age. We discuss mechanisms that could explain this finding and other counterintuitive results in this host–parasite system, and highlight the likely importance of host panmixia in generating great inter-individual variability in growth potential and infection risk. Under that scenario, the most active foragers would not only have the greatest size increase, but also the highest probability of becoming repeatedly infected—via trophic parasite transmission—during their continental life. |
format |
Article in Journal/Newspaper |
author |
Lefebvre, François Fazio, Géraldine Mounaix, Béatrice Crivelli, Alain J. |
spellingShingle |
Lefebvre, François Fazio, Géraldine Mounaix, Béatrice Crivelli, Alain J. Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
author_facet |
Lefebvre, François Fazio, Géraldine Mounaix, Béatrice Crivelli, Alain J. |
author_sort |
Lefebvre, François |
title |
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
title_short |
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
title_full |
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
title_fullStr |
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
title_full_unstemmed |
Is the continental life of the European eel Anguilla anguilla affected by the parasitic invader Anguillicoloides crassus ? |
title_sort |
is the continental life of the european eel anguilla anguilla affected by the parasitic invader anguillicoloides crassus ? |
publisher |
The Royal Society |
publishDate |
2013 |
url |
http://dx.doi.org/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2012.2916 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2012.2916 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 280, issue 1754, page 20122916 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2012.2916 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
280 |
container_issue |
1754 |
container_start_page |
20122916 |
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1800746322546917376 |