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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on September 25, 2008
ICES Journal of Marine Science: Journal du Conseil 2009 66(2):358-366; doi:10.1093/icesjms/fsn160
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© 2008 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Salinity dependence of parasite infestation in the European eel Anguilla anguilla in northern Germany

Eva Jakob1, Reinhold Hanel1, Sven Klimpel2 and Karsten Zumholz1

1 Leibniz Institute of Marine Sciences, Düsternbrooker Weg 20, 24105 Kiel, Germany
2 Institute of Zoomorphology, Cell Biology and Parasitology, Heinrich-Heine-University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany

Correspondence to E. Jakob: tel: +49 431 6004501; fax: +49 431 6004553; e-mail: ejakob{at}ifm-geomar.de

Jakob, E., Hanel, R., Klimpel, S., and Zumholz, K. 2009. Salinity dependence of parasite infestation in the European eel Anguilla anguilla in northern Germany. – ICES Journal of Marine Science, 66: 358–366.

The aim of the study was to examine metazoan parasite communities of European eels (Anguilla anguilla) in fresh-water, brackish water and marine localities in northern Germany. In all, 29 parasite species/taxa were found in 170 eels: eight digeneans, one monogenean, five cestodes, ten nematodes, two acanthocephalans, and three crustaceans. Measures of diversity characteristics of the helminth communities included species richness, Shannon's diversity index and its evenness, and the Berger–Parker dominance index. The highest species diversity and lowest dominance values were calculated for the helminth communities of eels from the two Baltic Sea localities. Parasite communities of European eels clearly exhibit the habitat preferences of their hosts, salinity-dependent specificities, and a clustering into fresh-water, brackish, and marine groups. The highly pathogenic parasite species Anguillicola crassus and Pseudodactylogyrus spp. were found at all sampling sites in fresh water and brackish water, with high prevalence. Basic information is provided on the risks of restocking programmes solely focusing on fresh-water sites.

Keywords: Anguilla anguilla, Anguillicola crassus, diversity, Germany, parasite communities, Pseudodactylogyrus spp., salinity, silver index

Received 1 September 2007; accepted 2 September 2008; advance access publication 25 September 2008.


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