Protozan and metazoan parasites of the eel anguilla anguilla, L. 1758 : Temporal structures of their population in a mediterranean lagoon

• Main Authors: Benajiba, Mohamed Hassan, Silan, Patrick, Marquès,, Adam, Bouix, Georges
• Other Authors: Abdelmalek Essaadi University Tétouan = Université Abdelmalek Essaadi Tétouan (UAE), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université Montpellier 2 - Sciences et Techniques (UM2)
• Format: Article in Journal/Newspaper
• Language: French
• Published: HAL CCSD 1994
• Subjects: population dynamics; Eimeria anguillae; Myxidium giardi; Anguillicola crassus; endoparasite; anguilla anguilla; fish; mediterranean sea; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDV.EE]Life Sciences [q-bio]/Ecology; environment; [SDE.MCG]Environmental Sciences/Global Changes; [SDV.EE.IEO]Life Sciences [q-bio]/Ecology; environment/Symbiosis; [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology; [SDV.BA.MVSA]Life Sciences [q-bio]/Animal biology/Veterinary medicine and animal Health; Anguilla anguilla
• Online Access: https://hal.science/hal-01076346; https://hal.science/hal-01076346/document; https://hal.science/hal-01076346/file/Benajiba_et_al_1994.pdf

International audience Three parasite species, Anguillicola crassus (Nematoda), Myxidium giardi (Myxozoa) and Eimeria anguillae (Sporozoa) were recorded in the eel, Anguilla anguilla from the Mediterranean Lagoon of Mauguio (Southern France). A. crassus is found in the swim bladder, M. giardi in the kidney and E. anguillae in the intestinal cells of this bony fish. A comparative study of the temporal variations in the population structures of these three endoparasites has been undertaken. This study reveals : a) the regular presence of these endoparasites throughout the year in the eel, and the relative stability of intensities; b) the changes in prevalence are rather cyclic in A. crassus; they increase during spring and autumn. This biannual prevalence change could be related to its biological cycle and this later related to the planktonic blooms in these lagoons; c) the populations of M. giardi increase slightly during spring and autumn. Their periodicity however is less evident; d) E. anguillae is a regular species but does not present any evident cyclic features. The ecopathological consequences of these demographic characteristics are discussed.