||Durieux Eric3, Begout Marie-Laure1, Sasal Pierre2
||1 : Univ La Rochelle, CRELA UMR 6217 CNRS, IFREMER, F-17137 Houmeau, France.
2 : Univ Perpignan, UPVD, UMR 5244 CNRS,EPHE, Lab Biol & Ecol Trop & Mediterraneenne, F-66860 Perpignan, France.
||Diseases of aquatic organisms (0177-5103) (Inter-Research), 2007-04 , Vol. 75 , N. 4 , P. 221228
|WOS© Times Cited
||River flow, Habitat quality, Trematodes, Parasitism, Juveniles, Flatfish
||We sampled 0-group sole juveniles (N = 174) in September and October 2003 in 9 major nurseries located along the French Atlantic coast (English Channel and Bay of Biscay). 0-group sole were infected with 3 genera of digenean metacercariae, Timoniella spp. (Acanthostomidae), Prosorhynchus crucibulum and Prosorhynchus sp. A (Bucephalidae), Podocotyle sp. (Opecoelidae), and an unidentified species of Digenea. Parasite infection levels in the English Channel nurseries were lower, and the community composition was different from Bay of Biscay nurseries. We hypothesize that the difference between geographic areas was due to differences in first intermediate host communities and, to a lesser extent, because of lower temperatures in the English Channel compared to the Bay of Biscay. For the Bay of Biscay nurseries, mean total parasite abundance was strongly negatively correlated with mean annual river flow. This relationship may be the result of the more upstream location of 0-group sole nurseries in estuaries so that fish were further from local points of parasite transmission than those in embayed nurseries. Digenean metacercariae load may be influenced by 3 major local factors, i.e. abundance and proximity of the first intermediate hosts and cercariae dispersal capacities.