Eye metacercariae in invasive pirarucu Arapaima gigas (Pisces: Arapaimidae): A potential ecological sink interaction?

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Estadual de Londrina (UEL)-
Autor(es): dc.contributorUniversidade Federal do Paraná (UFPR)-
Autor(es): dc.contributorCavanilles Institute of Biodiversity and Evolutionary Biology-
Autor(es): dc.creatorFranceschini, L.-
Autor(es): dc.creatorDias, F. G.C.-
Autor(es): dc.creatorMiguel, B. S.-
Autor(es): dc.creatorZago, A. C.-
Autor(es): dc.creatorOrsi, M. L.-
Autor(es): dc.creatorVitule, J. R.S.-
Autor(es): dc.creatorDe Almeida, F. S.-
Autor(es): dc.creatorPorto-Foresti, F.-
Autor(es): dc.creatorBalbuena, J. A.-
Autor(es): dc.creatorRamos, I. P.-
Autor(es): dc.creatorCasatti, L.-
Data de aceite: dc.date.accessioned2025-08-21T19:38:24Z-
Data de disponibilização: dc.date.available2025-08-21T19:38:24Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-02-17-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1017/S0022149X25000045-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/304321-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/304321-
Descrição: dc.descriptionBiological invasions are among the main threats to global biodiversity and present the potential to disrupt host-parasite dynamics. In Brazil, the scientific reports of the occurrence of the Amazonian fish 'pirarucu' (Arapaima gigas) in the upper Paraná River basin, Sao Paulo state, were made in 2015. However, the effects of its introduction are still unknown, including those associated to its host-parasite relationships. As part of our studies on the possible effects of A. gigas introduction into this basin, the parasites from the eyes of 60 specimens of A. gigas were evaluated. We reported the occurrence of Austrodiplostomum compactum metacercariae (Trematoda, Diplostomidae) parasitizing the eyes of A. gigas supported by morphological and molecular data (COI mtDNA). The new partial sequences had a similarity of 100% to other sequences of Au. compactum previously deposited in Genbank. Five hosts (Prevalence = 8.33%) with a standard length between 69 and 116 cm were infected, with a mean intensity of infection of 31.8 ± 17.2 (1-93). Large infected hosts are unlikely to be a significant prey item for the definitive hosts (medium-sized piscivorous birds), and could act as an 'ecological sink', disrupting the transmission of this metacercariae. Hosts with high infection rates by these metacercariae may present cataracts, exophthalmos, and blindness, resulting in loss of visual acuity. Considering that A. gigas is a carnivorous and visual predator, the low infection observed possibly does not act as a biological filter to hinder or contain the invasion, probably presenting a low negative effect on the visual acuity of hosts.-
Descrição: dc.descriptionSao Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences Department of Biological Science, Sao José do Rio Preto-
Descrição: dc.descriptionSao Paulo State University (UNESP) Department of Biology and Zootechny Ilha Solteira-
Descrição: dc.descriptionSao Paulo State University (UNESP) Institute of Biosciences of Botucatu, Botucatu-
Descrição: dc.descriptionSao Paulo State University (UNESP) School of Sciences, Bauru-
Descrição: dc.descriptionState University of Londrina (UEL) Department of Animal and Vegetal Biology, Paraná-
Descrição: dc.descriptionFederal University of Paraná (UFPR) Department of Environmental Engineering Polytechnic Center, Paraná-
Descrição: dc.descriptionState University of Londrina (UEL) Department of Biology, Paraná-
Descrição: dc.descriptionUniversitat de València (UV) Cavanilles Institute of Biodiversity and Evolutionary Biology, Comunitat Valenciana-
Descrição: dc.descriptionSao Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences Department of Biological Science, Sao José do Rio Preto-
Descrição: dc.descriptionSao Paulo State University (UNESP) Department of Biology and Zootechny Ilha Solteira-
Descrição: dc.descriptionSao Paulo State University (UNESP) Institute of Biosciences of Botucatu, Botucatu-
Descrição: dc.descriptionSao Paulo State University (UNESP) School of Sciences, Bauru-
Idioma: dc.languageen-
Relação: dc.relationJournal of Helminthology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectamplifier-
Palavras-chave: dc.subjectbiological invasion-
Palavras-chave: dc.subjectCOI mtDNA-
Palavras-chave: dc.subjecttrematode-
Título: dc.titleEye metacercariae in invasive pirarucu Arapaima gigas (Pisces: Arapaimidae): A potential ecological sink interaction?-
Tipo de arquivo: dc.typelivro digital-
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