Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium
Despite Egusa's earlier warning of the damage that the parasitic nematode Anguillicola crassus could inflict on the European eel Anguilla anguilla , its introduction in Europe was a fact in the early 1980s. Based on an elaborate dataset on Anguillicola crassus infection of 11 river catchments,...
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Language: | English |
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2003
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Online Access: | https://www.vliz.be/imisdocs/publications/66129.pdf |
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ftvliz:oai:oma.vliz.be:67870 2023-05-15T13:27:31+02:00 Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium Audenaert, V. Huyse, T. Goemans, G. Belpaire, C. Volckaert, F.A.M.J. 2003 application/pdf https://www.vliz.be/imisdocs/publications/66129.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000187755400006 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/dao056223 https://www.vliz.be/imisdocs/publications/66129.pdf info:eu-repo/semantics/openAccess %3Ci%3EDis.+Aquat.+Org.+56%283%29%3C%2Fi%3E%3A+223-233.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3354%2Fdao056223%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3354%2Fdao056223%3C%2Fa%3E Exotics Host guest relations Introduced species Parasite Parasites Prevalence Anguilla anguilla Anguillicola crassus Belgium Flanders info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftvliz https://doi.org/10.3354/dao056223 2022-05-01T08:46:51Z Despite Egusa's earlier warning of the damage that the parasitic nematode Anguillicola crassus could inflict on the European eel Anguilla anguilla , its introduction in Europe was a fact in the early 1980s. Based on an elaborate dataset on Anguillicola crassus infection of 11 river catchments, this paper presents the results of a detailed study on the dispersal of the parasite in Flanders, Belgium, and the host-parasite relationship. In addition, data from 1986 and 1997 are used for comparative purposes, providing a perspective on the temporal infection pattern over 15 yr. The presence of A. crassus in Flanders was first discovered in 1985; 2 yr later a survey revealed a prevalence of 34.1% and a mean infection intensity of 5.5, based on adult nematodes only, and 10 yr later the parasite was present at all 11 sites sampled. Prevalence had increased to 62.5% but the mean infection intensity had decreased to 3.9 adults per infected eel. Finally, in the year 2000, a third study revealed that A. crassus was present in 139 of 140 investigated sites; a further increase in prevalence to 68.7% and a decrease in mean infection intensity to 3.4 adults per infected eel was observed. When all larval stages were taken into account, mean prevalence amounted to 88.1% and mean intensity to 5.5 adults. The high infection level in Flanders is thought to be the result of restocking with glass eel and yellow eel, both of which are susceptible to A. crassus . The general infection parameters were similar in all 11 river catchments. It is possible that in Flanders both prevalence and mean infection intensity are stabilizing due to density-dependent regulation of the parasite infrapopulation. Fibrotic swimbladder walls were observed, mainly in large eels, and 20% of the total number of nematodes consisted of encapsulated larvae in the surveys of 1997 and 2000; 8 cases of swimbladder regeneration were observed. Article in Journal/Newspaper Anguilla anguilla European eel Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Diseases of Aquatic Organisms 56 223 233 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Exotics Host guest relations Introduced species Parasite Parasites Prevalence Anguilla anguilla Anguillicola crassus Belgium Flanders |
spellingShingle |
Exotics Host guest relations Introduced species Parasite Parasites Prevalence Anguilla anguilla Anguillicola crassus Belgium Flanders Audenaert, V. Huyse, T. Goemans, G. Belpaire, C. Volckaert, F.A.M.J. Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
topic_facet |
Exotics Host guest relations Introduced species Parasite Parasites Prevalence Anguilla anguilla Anguillicola crassus Belgium Flanders |
description |
Despite Egusa's earlier warning of the damage that the parasitic nematode Anguillicola crassus could inflict on the European eel Anguilla anguilla , its introduction in Europe was a fact in the early 1980s. Based on an elaborate dataset on Anguillicola crassus infection of 11 river catchments, this paper presents the results of a detailed study on the dispersal of the parasite in Flanders, Belgium, and the host-parasite relationship. In addition, data from 1986 and 1997 are used for comparative purposes, providing a perspective on the temporal infection pattern over 15 yr. The presence of A. crassus in Flanders was first discovered in 1985; 2 yr later a survey revealed a prevalence of 34.1% and a mean infection intensity of 5.5, based on adult nematodes only, and 10 yr later the parasite was present at all 11 sites sampled. Prevalence had increased to 62.5% but the mean infection intensity had decreased to 3.9 adults per infected eel. Finally, in the year 2000, a third study revealed that A. crassus was present in 139 of 140 investigated sites; a further increase in prevalence to 68.7% and a decrease in mean infection intensity to 3.4 adults per infected eel was observed. When all larval stages were taken into account, mean prevalence amounted to 88.1% and mean intensity to 5.5 adults. The high infection level in Flanders is thought to be the result of restocking with glass eel and yellow eel, both of which are susceptible to A. crassus . The general infection parameters were similar in all 11 river catchments. It is possible that in Flanders both prevalence and mean infection intensity are stabilizing due to density-dependent regulation of the parasite infrapopulation. Fibrotic swimbladder walls were observed, mainly in large eels, and 20% of the total number of nematodes consisted of encapsulated larvae in the surveys of 1997 and 2000; 8 cases of swimbladder regeneration were observed. |
format |
Article in Journal/Newspaper |
author |
Audenaert, V. Huyse, T. Goemans, G. Belpaire, C. Volckaert, F.A.M.J. |
author_facet |
Audenaert, V. Huyse, T. Goemans, G. Belpaire, C. Volckaert, F.A.M.J. |
author_sort |
Audenaert, V. |
title |
Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
title_short |
Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
title_full |
Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
title_fullStr |
Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
title_full_unstemmed |
Spatio-temporal dynamics of the parasitic nematode Anguillicola crassus in Flanders, Belgium |
title_sort |
spatio-temporal dynamics of the parasitic nematode anguillicola crassus in flanders, belgium |
publishDate |
2003 |
url |
https://www.vliz.be/imisdocs/publications/66129.pdf |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000187755400006 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/dao056223 https://www.vliz.be/imisdocs/publications/66129.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/dao056223 |
container_title |
Diseases of Aquatic Organisms |
container_volume |
56 |
container_start_page |
223 |
op_container_end_page |
233 |
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1766398859321278464 |