parasitological study of Anguilla Anguilla in two lagoons in Corsica and ultrastructural study of the integument of three digeneans parasites that eel

• Main Author: Filippi, Jean-José
• Other Authors: Sciences pour l'environnement (SPE), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Université Pascal Paoli, Bernard Marchand, Joséphine Foata
• Format: Doctoral or Postdoctoral Thesis
• Language: French
• Published: HAL CCSD 2013
• Subjects: Lagoons; Indicator species; Diversity; Interactions; Parasite communities; European eel; Digenea; Electron microscopy; Tegument; Tégument; Microscopie électronique; Digènes; Lagunes; Anguille d'Europe; Communautés de parasites; Diversité; Espèces indicatrices; [SDV.SA]Life Sciences [q-bio]/Agricultural sciences; Anguilla anguilla
• Online Access: https://tel.archives-ouvertes.fr/tel-00819285; https://tel.archives-ouvertes.fr/tel-00819285/document; https://tel.archives-ouvertes.fr/tel-00819285/file/JJFilippi_diffusion_2013.pdf

A survey of the parasitic fauna of the European eel has been conducted in the Biguglia and Urbino lagoons in Corsica. The composition of the parasite communities was determined. Thirteen parasite species were identified namely: three digeneans, Bucephalus anguillae, Deropristis inflata, Lecithochirium musculus; one monogenean, Pseudodactylogyrus anguillae; three cestodes, Bothriocephalus claviceps, Proteocephalus macrocephalus, larvae of Myzophyllobothrium sp.; three nematodes, Anguillicoloides crassus, encysted larvae of Contracaecum sp., Goezia anguillae; one acanthocephalan, Acanthocephaloides incrassatus; one copepod, Ergasilus gibbus; and plasmodia of one myxozoan, Myxobolus portucalensis. The presence of invasive species in lagoons from Corsica, namely the gill monogenean P. anguillae and the swimbladder nematode A. crassus, was confirmed. These species, particularly the monogenean, exhibit increasing infection rates since the last studies conducted. Many species showed significant differences in prevalence between the two lagoons. Differences in the species richness and higher values of diversity for the intestinal parasite component communities and infracommunities of eels from the Urbino lagoon were demonstrated. However, highest values of richness and lowest dominance values were observed for the parasite communities of eels from the Biguglia lagoon. We also demonstrated lower values of diversity for the parasite communities of eels from Corsica in comparison to eels from other European lagoons. The environment of the host (in particular the salinity range) has been demonstrated to have a significant influence on the composition of the parasite communities of eels from the Biguglia and Urbino lagoons. Highest values of infestation were observed for the warmer seasons of the year for the majority of the parasite species (B. anguillae, D. inflata, L. musculus, P. anguillae, P. macrocephalus, A. crassus, encysted larvae of Contracaecum sp., A. incrassatus, and E. gibbus). We also demonstrated that ...