INTESTINAL HELMINTHS OF FRANCISCANA (Pontoporia blainvillei) AND GUIANA DOLPHINS (Sotalia guianensis) FROM THE NORTH COAST OF SANTA CATARINA STATE, BRAZIL

Abstract

The study of helminth parasites of cetaceans from distinct areas helps to identify ecological differences among groups. This study reports the helminth fauna present in the intestinal tract of Pontoporia blainvillei (n=28) and Sotalia guianensis (n=21) found dead on beaches along the north coast of Santa Catarina and the differences in intensity levels and infection prevalence among individuals from the inner region of Babitonga Bay in comparison with those collected in the adjacent coastal region. We analyzed 49 intestines removed from carcasses recovered from 2000 to 2014. The trematode Synthesium pontoporiae was the only parasite identified in the intestines of P. blainvillei. Individuals from Babitonga Bay had lower intensity and prevalence values than those collected in the adjacent coastal region. These results corroborate those of previous studies that indicated some level of insulation for the population living in Babitonga Bay. The trematode species Synthesium tursionis and the acanthocephalan genus Bolbosoma were found in Sotalia guianensis. There was no difference in intensity and prevalence indices between genders for both cetacean species.