The helminth infracommunities included 1 secondary and 8 satellite species. The mean number of species component per individual host is lower than those proposed for some marine fishes. No significative interspecific associations were found among the component species. The present results are consistent with those of previous research on parasites of rays in the sense that cestodes are the dominant major helminth group in the assemblage. All of the species present have low prevalence, intensity of infection and abundance.
Acanthocephalans are absent or accidental components in the helminth fauna of elasmobranchs.
The parasite assemblage of Sympterygia bonapartei in the sampled area, disagree with the proposal that consider the diversity of parasitic assemblages of elasmobranchs to be amplified. Material for evaluation was obtained from Buteo buteo , Falco tinnunculus , Accipiter nisus and A. gentilis . Individual birds were examined from Milvus milvus , Haliaeetus albicilla , Buteo lagopus , Pernis apivorus , Aquila chrysaetos , A. rapax , A. clanga , Circus aeruginosus , C. cyaneus , Falco peregrinus , F. cherrug , F. vespertinus and F. subbuteo. Metorchis crassiusculus , Plagiorchis elegans , Strigea falconis , S. vandenbrokae , Parastrigea flexis , Cotylurus cornutus , Tylodelphys excavata , Neodiplostomum attenuatum , N. spa- thoides , N. perlatum and Pracoenogonimus ovatus . E. falconi was found for the first time in Europe .