Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Helminths of cetaceans on the Southeastern Coast of Brazil.

Abstract

Seventy cetaceans accidentally captured in fishing nets in Rio de Janeiro State, Brazil, were dissected for parasites. Sotalia fluviatilis harboured Braunina cordiformis, Halocercus brasiliensis, and Anisakis typica. Tursiops truncatus was parasitized by Nasitrema sp. and B. cordiformis. Steno bredanensis had only B. cordiformis. Sotalia fluviatilis represents a new host record for Braunina cordiformis that is reported for the first time from Brazil. In an attempt to correlate the parasite infections with the food habits of the cetaceans, a survey of fish (20 species) and Loligo sanpaulensis from the same area, was undertaken. Only Bagre bagre, Macrodon ancylodon, and Nebris microps contained Anisakis sp. larvae, a parasite species infecting cetaceans. Lack of parasites in 42 Pontoporia blainvillei (Pontoporiidae) within the study area was probably related to the age of the hosts and differences in food habits between young and adults.