The influence of environmental factors on Clinostomum sp. (Digenea) infection in the fish Cichlasoma paranaense (Kullander, 1983) in Central Brazil

This study analyzed the parasitism by Clinostomum sp. metacercariae of the neotropical fish Cichlasoma paranaense (Kullander 1983) and environmental variables' influence on their host-parasite relationship in Central Brazil. Fish were collected in five impoundments (I) from three towns: Itauçú...

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Published in:	Anais da Academia Brasileira de Ciências Vol. 94; no. 2; p. e20200872
Main Authors:	Silva, Yasmim R R, Lourenço, Angélica B, Ramalho, Werther P, Caixeta, Maxwell B, Rocha, Thiago L, Souza, Jessica Y DE, Grano-Maldonado, Mayra I, Silva, Luciana D
Format:	Journal Article
Language:	English
Published:	Brazil Academia Brasileira de Ciências 01-01-2022
Subjects:	Animals Brazil - epidemiology Cichlids - parasitology Digenean Fish Diseases - epidemiology Fish Diseases - parasitology host fish host-parasite relationship limnological variables Metacercariae MULTIDISCIPLINARY SCIENCES Trematoda Trematode Infections - epidemiology Trematode Infections - parasitology Trematode Infections - veterinary Brazil metacercariae host fish Digenean limnological variables host-parasite relationship
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Summary:	This study analyzed the parasitism by Clinostomum sp. metacercariae of the neotropical fish Cichlasoma paranaense (Kullander 1983) and environmental variables' influence on their host-parasite relationship in Central Brazil. Fish were collected in five impoundments (I) from three towns: Itauçú (n = 2), Inhumas (n = 1), and Goiânia (n = 2), Goiás State, Brazil. Ninety-five fish were analyzed, weighted and length measured. Afterward, the presence of metacercariae in the gills, muscles, fins, and body cavities was investigated. The metacercariae were fixed in AFA solution, kept in 70% alcohol, and stained with carmine. The infection prevalence revealed that 0.64, 0.56 and 0.91% of fish was infected. The abundance was 4.14, 3.22 and 5.88, with a mean intensity of 6.44, 5.80 and 6.42 per impoundment (I 13, I 15 and I 16), respectively. The frequency of metacercariae was higher in fish collected in Goiânia. High frequency of parasites was observed in the gills, muscles, and fins. The limnological variables did not present direct interference in the parasitism. The fish' standard length influenced the number of metacercariae positively but did not differ to the relative condition coefficient.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0001-3765 1678-2690 1678-2690
DOI:	10.1590/0001-3765202220200872