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

Abstract

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