Spatio-temporal dynamics of the nematode Anguillicola crassus in Northeast Tunisian lagoons

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Anguillicola crassus, parasite nematode of the European eel Anguilla anguilla, was recorded for the first time in Tunisia (1999) in the Ichkeul lagoon. Its distribution has since spread toward Bizerte and Ghar El Melh lagoons. The monthly epidemiological survey reveals that A. crassus exists throughout the year in the Ichkeul lagoon. In this lagoon, its prevalence is low in winter (12% in December), with a marked increases in the spring reaching a maximum in March (35%), before it starts to decrease in summer with a minimum in July (4.35%), which in turn is followed by a pronounced new rise in autumn (30% in November). However, mean intensity values do not show such a marked variation. The majority of the values are between 1 and 1.5 parasites per host. In the Bizerte and Ghar El Melh lagoons, the presence of this nematode is limited only to one to three months. Investigations in the Tunis lagoon did not reveal until now the presence of A. crassus. It has been observed that the length of the eel influences the prevalence values: A. crassus becomes less common if the length of the eel increases. Comparatively with the global epidemiological values of A. crassus signalled subsequently (1999) in the Ichkeul lagoon, we note that the present values record a clean increase. To cite this article: L. Gargouri Ben Abdallah, F. Maamouri, C. R. Biologies 329 (2006). © 2006 Académie des sciences.




Gargouri Ben Abdallah, L., & Maamouri, F. (2006). Spatio-temporal dynamics of the nematode Anguillicola crassus in Northeast Tunisian lagoons. Comptes Rendus - Biologies, 329(10), 785–789.

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