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New records of Opechona sp. metacercariae (Digenea: Trematoda) on hydromedusae from south Brazil

Published online by Cambridge University Press:  31 May 2013

Miodeli Nogueira Júnior ,
Luciana Diaz-Briz  and
Maria Angélica Haddad
Miodeli Nogueira Júnior*
Affiliation:
Instituto Oceanográfico, Departamento de Oceanografia Biológica, Universidade de São Paulo, Praça do Oceanográfico, 191, Cidade Universitária, CEP 05508-120, São Paulo, Brazil
Luciana Diaz-Briz
Affiliation:
CONICET—Estación Costera Nágera, Facultad de Ciencias Exactas y Naturales—Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
Maria Angélica Haddad
Affiliation:
Programa de Pós-Graduação em Zoologia, Universidade Federal do Paraná, Departamento de Zoologia, Centro Politécnico, Curitiba, Brazil
*
Correspondence should be addressed to: M. Nogueira Júnior, Instituto Oceanográfico, Departamento de Oceanografia Biológica, Universidade de São Paulo, Praça do Oceanográfico, 191, Cidade Universitária, CEP 05508-120, São Paulo, Brasil email: [email protected]
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Abstract

Six new records of hydromedusae are reported as secondary hosts of Opechona sp. (Lepocreadiidae) for the Brazilian coast. Among the 392 hydromedusae sampled, 43 (~11%) were harbouring metacercaria. Prevalence (P) and intensity of infection (I) of Opechona sp. varied considerably among the different host species. Gossea brachymera (Limnomedusae) was highly parasitized (P = 30%; I = 1–7), while the other five hydromedusae species were not (P = 1.5–10; I = 1–2). The high parasitism in G. brachymera suggests the importance of this species in the transmission of Opechona sp. to fish, the definitive hosts, and highlights the hydromedusae as a probable noteworthy food item for zooplanktivorous fish in the area.

Keywords

parasitismHydrozoajellyfishflatwormGossea brachymeraLepocreadiidaeprevalenceintensity of infectionSouth Atlantic
Type
Research Article
Information
Marine Biodiversity Records , Volume 6 , 2013 , e69
Copyright
Copyright © Marine Biological Association of the United Kingdom 2013 

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