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      Acanthocephalan parasites of the flounder species Paralichthys isosceles, Paralichthys patagonicus and Xystreurys rasile from Brazil Translated title: Acantocéfalos parasitos de espécies de linguados Paralichthys isosceles, Paralichthys patagonicus e Xystreurys rasile no Brasil

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          Abstract

          Abstract Flounders are commercially and economically important fish. A total of 120 specimens of flounders (60 Paralichthys isosceles, 30 Paralichthys patagonicus and 30 Xystreurys rasile) were collected off the coast of the state of Rio de Janeiro, Brazil. The fish were measured, necropsied and filleted, and then had their organs investigated for acanthocephalans. Taxonomic identification of the parasites was based on morphological, morphometric and genetic characters. Paralichthys isosceles and P. patagonicus were parasitized by juveniles of Serrasentis sagittifer, Bolbosoma turbinella, Corynosoma australe and C. cetaceum; Xystreurys rasile was parasitized by C. australe. Genetic characterization confirmed the identification of specimens of Bolbosoma turbinella and Corynosoma australe, as demonstrated by phylogenetic analyses using both ITS and cox1 molecular targets. Parasite indices of prevalence, intensity, mean intensity, abundance, mean abundance, and range of infection, as well as infection site, were evaluated for each parasite species. This is the first report of S. sagittifer parasitizing P. isosceles and P. patagonicus, and B. turbinella parasitizing P. patagonicus.

          Translated abstract

          Resumo Os linguados são peixes comercial e economicamente importantes. Um total de 120 espécimes de linguados (60 Paralichthys isosceles, 30 P. patagonicus e 30 Xystreurys rasile) foram coletados no litoral do estado do Rio de Janeiro, Brasil. Os peixes foram medidos, necropsiados, filetados e tiveram seus órgãos investigados para a presença de acantocéfalos. A identificação taxonômica foi baseada em caracteres morfológicos, morfométricos e genéticos. Paralichthys isosceles e P. patagonicus estavam parasitados por acantocéfalos juvenis de Serrasentis sagittifer, Bolbosoma turbinella, Corynosoma australe e C. cetaceum; Xystreurys rasile estava parasitado com C. australe. A caracterização genética confirmou a identificação dos espécimes de Bolbosoma turbinella e Corynosoma australe, como demonstrado por análises filogenéticas usando ambos marcadores moleculares ITS e cox1. Foram analisados os índices parasitários: prevalência, intensidade, intensidade média, abundância, abundância média, amplitude de variação da infecção e sítio de infecção de cada espécie de parasito. Este é o primeiro registro de S. sagittifer parasitando P. isosceles e P. patagonicus, e de B. turbinella parasitando P. patagonicus.

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          Precision Farming: Technologies and Information as Risk-Reduction Tools

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            Classification of the acanthocephala.

            O Amin (2013)
            In 1985, Amin presented a new system for the classification of the Acanthocephala in Crompton and Nickol's (1985) book 'Biology of the Acanthocephala' and recognized the concepts of Meyer (1931, 1932, 1933) and Van Cleave (1936, 1941, 1947, 1948, 1949, 1951, 1952). This system became the standard for the taxonomy of this group and remains so to date. Many changes have taken place and many new genera and species, as well as higher taxa, have been described since. An updated version of the 1985 scheme incorporating new concepts in molecular taxonomy, gene sequencing and phylogenetic studies is presented. The hierarchy has undergone a total face lift with Amin's (1987) addition of a new class, Polyacanthocephala (and a new order and family) to remove inconsistencies in the class Palaeacanthocephala. Amin and Ha (2008) added a third order (and a new family) to the Palaeacanthocephala, Heteramorphida, which combines features from the palaeacanthocephalan families Polymorphidae and Heteracanthocephalidae. Other families and subfamilies have been added but some have been eliminated, e.g. the three subfamilies of Arythmacanthidae: Arhythmacanthinae Yamaguti, 1935; Neoacanthocephaloidinae Golvan, 1960; and Paracanthocephaloidinae Golvan, 1969. Amin (1985) listed 22 families, 122 genera and 903 species (4, 4 and 14 families; 13, 28 and 81 genera; 167, 167 and 569 species in Archiacanthocephala, Eoacanthocephala and Palaeacanthocephala, respectively). The number of taxa listed in the present treatment is 26 families (18% increase), 157 genera (29%), and 1298 species (44%) (4, 4 and 16; 18, 29 and 106; 189, 255 and 845, in the same order), which also includes 1 family, 1 genus and 4 species in the class Polyacanthocephala Amin, 1987, and 3 genera and 5 species in the fossil family Zhijinitidae.
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              Acanthocephalan infections of man, with two new records.

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbpv
                Revista Brasileira de Parasitologia Veterinária
                Rev. Bras. Parasitol. Vet.
                Colégio Brasileiro de Parasitologia Veterinária (Jaboticabal, SP, Brazil )
                0103-846X
                1984-2961
                July 2019
                : 28
                : 3
                : 346-359
                Affiliations
                [03] Rio de Janeiro Rio de Janeiro orgnameUniversidade do Estado do Rio de Janeiro orgdiv1Faculdade de Ciências Médicas orgdiv2Laboratório de Helmintologia Romero Lascasas Porto Brazil
                [04] Rio de Janeiro orgnameFundação Oswaldo Cruz orgdiv1Instituto Oswaldo Cruz orgdiv2Laboratório de Biologia de Tripanossomatídeos Brazil
                [01] Rio de Janeiro orgnameFundação Oswaldo Cruz orgdiv1Instituto Oswaldo Cruz orgdiv2Laboratório de Helmintos Parasitos de Vertebrados Brazil
                [02] Niterói Rio de Janeiro orgnameUniversidade Federal Fluminense orgdiv1Laboratório de Inspeção e Tecnologia do Pescado Brazil
                Article
                S1984-29612019000300346
                10.1590/s1984-29612019031
                31215609
                987336a6-967f-45e8-9216-c757a4b26fa2

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 04 January 2019
                : 22 April 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 49, Pages: 14
                Product

                SciELO Brazil

                Categories
                Original Article

                Acantocéfalos,taxonomia integrativa,Paralichthys isosceles,Paralichthys patagonicus,Xystreurys rasile,Brasil,Acantocephalans,integrative taxonomy,Brazil

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