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Philometra saltatrix (Nematoda: Philometridae) in the ovary of the bluefish, Pomatomus saltatrix (Linnaeus, 1766), off the coast of the state of Rio de Janeiro, Brazil

  • S.C. São Clemente (a1), N.N. Felizardo (a1), M.F. Ferreira (a2), R.C. Menezes (a3), N.C. Cunha (a4), F.C.C. Aguiar (a4), E.R. Nascimento (a4), E.L. Telleria (a5), R. Tortelly (a6) and M. Knoff (a7)...


The aims of the present study were to identify and describe the occurrence of nematode parasites in the gonads of bluefish Pomatomus saltatrix from off the coast of the state of Rio de Janeiro, Brazil. Only females were found to be parasitized by the nematodes, which were identified as P. saltatrix using morphological, morphometric and molecular data. Infection of female bluefish by this nematode had the following values: prevalence, 48.7%; mean intensity, 2.6; mean abundance, 1.3; and range of infection, 1–10 specimens. Histopathological examination of transverse and longitudinal sections of the parasitized ovaries showed nematodes at different stages of development among oocytes, but no indication of any associated inflammatory reaction. The presence of nematodes in the ovaries of bluefish is an important indication of fish hygiene, and parasitized fish are usually rejected by consumers because of their repugnant appearance.


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Altschul, S.F., Gish, W., Miller, W., Myers, E.W. & Lipman, D.J. (1990) Basic local alignment search tool. Journal of Molecular Biology 215, 403410.
Behmer, O.A., Tolosa, E.M.C. & Freitas-Neto, A.G. (1976) Manual de Técnicas para Histologia Normal e Patológica. 256 pp. São Paulo, Edart.
Benson, D.A., Clark, K., Karsch-Mizrachi, I., Lipman, D.J., Ostell, J. & Sayers, E.W. (2015) GenBank. Nucleic Acids Research 43, D3035.
Bush, A.O., Lafferty, K.D., Lotz, J.M. & Shostak, A.W. (1997) Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology 83, 575583.
Clarke, L.M., Dove, A.D.M. & Conover, D.O. (2006) Prevalence, intensity, and effect of a nematode (Philometra saltatrix) in the ovaries of bluefish (Pomatomus saltatrix). Fishery Bulletin 104, 118124.
de Buron, I., France, S.G., Connors, V.A., Roumillat, W.A. & Tsoi, L.C. (2011) Philometrids of the southern flounder Paralichthys lethostigma: a multidimensional approach to determine their diversity. Journal of Parasitology 97, 466475.
Figueiredo, J.L. & Menezes, N.A. (1980) Manual de peixes marinhos do sudeste do Brasil III. Teleostei (2). 90 pp. São Paulo, Museu de Zoologia USP.
Froese, R. & Pauly, D. (2015) FishBase. World Wide Web electronic publication. Available at (accessed April 2015).
Genc, E., Genc, M.A., Genc, E., Cengizler, I. & Can, M.F. (2005) Seasonal variation and pathology associated with helminthes infecting two serranids (Teleostei) of Iskenderun Bay (Northeast Mediterranean Sea), Turkey. Turkish Journal of Fisheries and Aquatic Science 5, 2933.
Hesp, S.A., Hobbs, R.P. & Potter, I.C. (2002) Infection of the gonads of Glaucosoma hebraicum by the nematode Philometra lateolabracis: occurrence and host response. Journal of Fish Biology 60, 663673.
Knoff, M. & Gomes, D.C. (2012) Metodologia básica para coleta e o processamento de helmintos parasitos. pp. 251281 in Molinaro, E.M., Caputo, L.F.G & Amendoeira, M.R.R. (Eds) Conceitos e métodos para a formação de profissionais em laboratórios de saúde. Vol. 5. Rio de Janeiro, EPSJV.
Korf, I., Yandell, M. & Bedell, J. (2003) BLAST. 360 pp. Sebastopol, California, USA, O'Reilly & Associates.
Luque, J.L., Aguiar, J.C., Vieira, F.M., Gibson, D.I. & Santos, C.P. (2011) Checklist of Nematoda associated with the fishes of Brazil. Zootaxa 3082, 188.
Moravec, F. (2004) Some aspects of the taxonomy and biology of dracunculoid nematodes parasitic in fishes: a review. Folia Parasitologica 51, 113.
Moravec, F., Glamuzina, B., Marino, G., Merella, P. & Di Cave, D. (2003) Occurrence of Philometra lateolabracis (Nematoda: Philometridae) in the gonads of marine perciform fishes in the Mediterranean region. Diseases of Aquatic Organisms 53, 267269.
Moravec, F., Magi, M. & Macchioni, F. (2008) Redescription of the gonad-infecting nematode Philometra saltatrix Ramachandran, 1973 (Philometridae) based on specimens from the type host Pomatomus saltatrix (L.) (Osteichthyes) from the Tuscan Sea, Italy. Folia Parasitologica 55, 219223.
Oliva, M.E., Borquez, A.S. & Olivares, N.A. (1992) Sexual status of Paralabrax humeralis (Serranidae) and infection by Philometra sp. (Nematoda: Dracunculoidea). Journal of Fish Biology 40, 979980.
Palesse, S., Meadors, W.A., de Buron, I., Roumillat, W.A. & Strand, A. (2011) Use of molecular tools in identification of philometrid larvae in fishes: technical limitations parallel our poor assessment of their biodiversity. Parasitology Research 109, 17251730.
Pruitt, K.D., Tatusova, T. & Maglott, D.R. (2005) NCBI Reference Sequence (RefSeq): a curated non-redundant sequence database of genomes, transcripts and proteins. Nucleic Acids Research 33, D501504.
Rêgo, A.A., Vicente, J.J., Santos, C.P. & Wekid, R.M. (1983) Parasitas de anchovas, Pomatomus saltatrix (L.) do Rio de Janeiro. Ciência e Cultura 35, 13291336.
Spalding, M.D., Fox, H.E., Allen, G.R., Davidson, N., Ferdaña, Z.A., Finlayson, M., Halpern, B.S., Jorge, M.A., Lombana, A.L., Lourie, S.A., Martin, K.D. McManus, E., Molnar, J., Recchia, C.A. & Robertson, J. (2007). Marine ecoregions of the world: a bioregionalization of coastal and shelf areas. BioScience 57, 573583.


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