Occurrence of Contracaecum pelagicum (Johnston & Mawson 1942) (Nematoda: Anisakidae) in magellanic penguin (Spheniscus magellanicus (Forster, 1837)) collected from northeast Brazil, with an update on its distribution in the country

The study identified Contracaecum pelagicum (Johnston & Mawson 1942) as a parasite found in Sphenicus magellanicus (Forster, 1837), and low sampling of infected hosts was observed, with prevalence 33.3%, average intensity 6/host, mean abundance 2±3.46. This occurrence is uncommon the Northeast region Brazil, where previous records indicate higher presence southern country. contributes to understanding geographic distribution parasite. Anisakids, such C. pelagicum, have complex life cycle involving aquatic invertebrates, fishes, seabirds. this may ecological interactions marine ecosystem region. It important report discovery relevant authorities institutions monitor control These findings are health conservation seabirds ecosystems Brazil.