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      New records of crustaceans infesting Phractocephalus hemioliopterus (Siluriformes: Pimelodidae), the large catfish from the Amazon Translated title: Nuevos registros de crustáceos que infestan Phractocephalus hemioliopterus (Siluriformes: Pimelodidae), el gran bagre del Amazonas

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          Abstract

          Abstract The aim of the present study was to investigate the infracommunities of ectoparasitic crustaceans in Phractocephalus hemioliopterus Bloch and Schneider, 1801, a catfish from the lower Amazon River, in the state of Pará, eastern Amazon region, Brazil. From 12 hosts examined, a total of 45 specimens of crustacean ectoparasites from 5 species were found in the tegument, oral cavity or dorsal fins. The species were: Argulus multicolor, Argulus violaceus, Dolops nana, Dolops discoidalis, and Braga patagonica. Dolops discoidalis was the dominant ectoparasite, while D. nana had the highest mean intensity in the tegument, which was the most infested host site. This is the first record of A. multicolor, A. violaceus, D. nana and B. patagonica parasiting P. hemioliopterus.

          Translated abstract

          Resumen El objetivo del presente estudio fue investigar las infracomunidades de crustáceos ectoparásitos en Phractocephalus hemioliopterus Bloch y Schneider, 1801, un bagre de la parte baja del río Amazonas, en el estado de Pará, en la Amazonía oriental, Brasil. A partir de 12 hospederos examinados, se encontraron un total de 45 ejemplares de crustáceos ectoparásitos de 5 especies en el tegumento, cavidad o aletas dorsales orales. Las especies fueron: Argulus multicolor, Argulus violaceus, Dolops nana, Dolops discoidalis y Braga patagonica. Dolops discoidalis fue el ectoparásito dominante, mientras que D. nana tuvo la intensidad media más alta en el tegumento, que fue el sitio más infestado. Este es el primer registro de A. multicolor, A. violaceus, D. nana y B. patagonica parasitando P. hemioliopterus.

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          Cube law, condition factor and weight-length relationships: history, meta-analysis and recommendations

          R Froese (2006)
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            Checklist of Crustacea parasitizing fishes from Brazil

            Here we provide a checklist of the crustacean species parasitizing both marine and freshwater fishes from Brazil. We list a total of 134 species of parasitic crustaceans associated with 205 species of fishes in Brazil. The data from this study added to the checklist of Copepoda in Brazilian fishes published in 2007 give a total of 251 species of parasitic crustaceans associated with 279 fish species currently known in Brazil. The majority of species of Crustacea listed as parasites of Brazilian fishes are Copepoda with 186 species registered. A total of 741 parasite-host associations were observed. Copepoda was the group with more host-parasite associations, totaling 419 associations. When comparing these data with those recorded for the fishes from other parasite hotspots of Neotropics (Mexico and Caribbean), it is possible to affirm that the fauna of parasitic crustaceans of Brazilian fishes is the richest in the region.
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              Parasites of native Cichlidae populations and invasive Oreochromis niloticus (Linnaeus, 1758) in tributary of Amazonas River (Brazil)

              This study provides the first investigation on acquisition of parasites in invasive O. niloticus by parasite species of native Cichlidae from the Igarapé Fortaleza basin, Northern Brazil. There were examined 576 specimens of 16 species of native cichlids and invasive O. niloticus collected in the main channel and the floodplain area of this tributary of Amazon River. The invasive O. niloticus was poorly parasitized having only Ichthyophthirius multifiliis, Trichodina centrostrigeata, Paratrichodina africana, Trichodina nobilis (Protozoa) and Cichlidogyrus tilapiae (Monogenoidea), and this host has not acquired any parasite species common to the native ichthyofauna region. In contrast, species of native cichlids showed rich fauna of parasites with predominance of Monogenoidea species, larvae and adults of Nematoda, Digenea, Cestoidea and Acanthocephala, besides four species of Protozoa and four Crustacea. However, only T. nobilis was acquired by native fish, the Aequidens tetramerus, which is a new host for this exotic Trichodinidae. In O. niloticus, well established in the region, the small number of helminth species may be associated with its rusticity, good adaptation in the new environment and also the presence of native parasites with relative specificity, but without ability to complete its life cycle in this invasive host of this ecosystem.
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                Author and article information

                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México, DF, Mexico )
                1870-3453
                2007-8706
                2019
                : 90
                : e901969
                Affiliations
                [1] Santarém Pará orgnameUniversidade Federal do Oeste do Pará Brazil
                [3] Manaus AM orgnameUniversidade Nilton Lins Brazil
                [6] Macapá Amapá orgnameEmbrapa Amapá Brazil
                [2] Santarém Pará orgnameUniversidade Federal do Oeste do Pará orgdiv1Instituto de Ciências e Tecnologia das Águas Brazil
                [5] Belém Pará orgnameUniversidade Federal Rural da Amazônia Brazil
                [4] Macapá Amapá orgnameUniversidade Federal do Amapá Brazil
                Article
                S1870-34532019000100629 S1870-3453(19)09000000629
                10.22201/ib.20078706e.2019.90.1969
                be90ab65-9d54-47ad-9888-5eb65bdf70cc

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

                History
                : 14 August 2019
                : 17 October 2016
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 0
                Product

                SciELO Mexico

                Categories
                Ecology

                Ecology
                Amazonía,Pimelodidae,Amazon,Freshwater fish,Parásitos,Parasites,Peces de agua dulce
                Ecology
                Amazonía, Pimelodidae, Amazon, Freshwater fish, Parásitos, Parasites, Peces de agua dulce

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