Protozoan and metazoan parasites of Nile tilapia Oreochromis niloticus cultured in Brazil
Journal Title: Revista MVZ Cordoba - Year 2012, Vol 17, Issue 1
Abstract
Objective. This study describes the parasitic fauna and relative condition factor (Kn) in Nile tilapia Oreochromis niloticus L. (Cichlidae) from fish farms in the State of Amapá. Material and methods. 123 fish from four fish farms in the state of Amapá, Brazil were necropsied for parasitological and Kn analysis. Results. 64.2% of the examined fish, had the gills infected with Cichlidogyrus tilapiae Paperna, 1960 (Monogenoidea: Dactylogyridae); Ichthyophthirius multifiliis Fouquet, 1876 (Protozoa: Ciliophora), Trichodina Ehrenberg, 1830 and Paratrichodina africana Kazubski & El-Tantawy, 1986 (Protozoa: Trichodinidae). The highest prevalence found corresponded to Monogenoidea C. tilapiae while the lowest corresponded to Trichodinidae. However, I. multifiliis was the parasite that presented the greatest intensity and abundance. The differences found in the infection rates of the different fish farms due to causes further discussed. The parasitism did not influence the relative condition factor (Kn) of fish. This was the first record of P. africana in Brazil and occurred in the Eastern Amazon. Conclusions. In Brazil, Lamproglena sp. is an emerging parasite in the Southern and Southeastern regions, but this crustacean was not found in the Nile tilapia in the State of Amapá. The parasitic infections in Nile tilapia farmed in Brazil are caused by protozoan, monogenoidea, crustacea and digenea species, and the regional differences on their prevalence and intensity rates are discussed in this study.
Authors and Affiliations
Wanderson Pantoja MF, Fishing Engineer| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil., Ligia Neves R, Fishing Engineer| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil., Márcia Dias RD, Biologist| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil.Universidade Federal do Amapá (UNIFAP), Programa de Pós-Graduação em Biodiversidade Tropical, Macapá, AP, Brasil., Renata Marinho GB, Zoo Technician| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil.Universidade Federal do Amapá (UNIFAP), Programa de Pós-Graduação em Biodiversidade Tropical, Macapá, AP, Brasil., Daniel Montagner, M. Sc| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil., Marcos Tavares-Dias, Ph. D *| Embrapa Amapá, Laboratório de Aquicultura e Pesca, Macapá, AP, Brasil.Correspondence: marcostavares@cpafap.embrapa.br
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