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	Provedor de dados Neotropical Ichthyology (2) Autor Lima,Neuza R. W. (2) Azevedo,Juliana de S. (1) Dansa-Petretski,Marilvia (1) Lins,Débora C. (1) Malm,Olaf (1) Meirelles,Maria E. (1) Silva,Leonardo G. da (1) Mais... Palavra-chave 17 Beta-estradiol (1) Bioaccumulation (1) Heavy metal (1) Parasitic castration (1) Prevalence of parasitism (1) Reproduction (1) Scales lines (1) Total testosterone (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Mercury concentration in the freshwater bonefish Cyphocharax gilbert (Curimatidae) and its parasite the crustacean Riggia paranensis (Cymothoidae) Neotropical Ichthyology Lins,Débora C.; Meirelles,Maria E.; Malm,Olaf; Lima,Neuza R. W.. Fish parasites can accumulate heavy metals reaching higher concentrations than the host and may affect the host's bioaccumulation. The present study compared total mercury concentration in the liver and muscle of Cyphocharax gilbert and in the parasite Riggia paranensis sampled in the middle Itabapoana River, Brazil, also considering the reproductive stages of both fish and parasite. Mean concentrations of mercury in muscle of fish varied from 20.8 ng.g-1 in mature females to 38.1 ng.g-1 in post-spawning females. The mean concentrations in fish liver varied from 60.9 ng/g in post-spawning females to 110.4 ng.g-1 in infested males. The mean concentration of mercury in parasites varied from 26.2 ng.g-1 in specimens carrying early embryo to 39.5 ng.g-1 in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Bioaccumulation; Parasitic castration; Reproduction. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200017 Parasitic castration, growth, and sex steroids in the freshwater bonefish Cyphocharax gilbert (Curimatidae) infested by Riggia paranensis (Cymothoidea) Neotropical Ichthyology Lima,Neuza R. W.; Azevedo,Juliana de S.; Silva,Leonardo G. da; Dansa-Petretski,Marilvia. Cyphocharax gilbert shows parasitic castration when infested by the crustacean Riggia paranensis, being unable to reproduce. Fish were sampled in the middle rio Itabapoana, Brazil, to study the prevalence of parasitism, growth, and sex steroid concentrations, considering the body size, sex, and reproductive condition of specimens. Most of the fish analyzed were infested (56.0%). The presence of two lines on the scales was more frequent among infested fish (22.0%) than among fish without parasites (12.0% for females and 10.0% for males). The occurrence of three lines on the scales was rare (3.5% among infested and 2.0% among females without parasites). These results suggest that growth of the host is faster than that of non infested fish. The serum... Tipo: Info:eu-repo/semantics/article Palavras-chave: Prevalence of parasitism; Scales lines; 17 Beta-estradiol; Total testosterone. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000400006 Registros recuperados: 2 Primeira ... 1 ... Última

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