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	Provedor de dados Neotropical Ichthyology (2) Autor Azevedo,Juliana de S. (1) Azevedo,Juliana de Souza (1) Bizerri,Carlos Roberto Silveira Fontenelle (1) Dansa-Petretski,Marilvia (1) Dansa-Petretski,Marilvia Alencar (1) Lima,Neuza R. W. (1) Lima,Neuza Rejane Wille (1) Silva,Leonardo G. da (1) Silva,Leonardo Gomes da (1) Mais... Palavra-chave Prevalence of parasitism (2) 17 Beta-estradiol (1) Body size (1) Parasitic castration (1) Reproduction (1) Scales lines (1) Total testosterone (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2007 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última 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 Infestation pattern and parasitic castration of the crustacean Riggia paranensis (Crustacea: Cymothoidea) on the fresh water fish Cyphocharax gilbert (Teleostei: Curimatidae) Neotropical Ichthyology Azevedo,Juliana de Souza; Silva,Leonardo Gomes da; Bizerri,Carlos Roberto Silveira Fontenelle; Dansa-Petretski,Marilvia Alencar; Lima,Neuza Rejane Wille. Cyphocharax gilbert infested by Riggia paranensis shows parasitic castration. The prevalence of parasitism in C. gilbert varied among different environments, being higher in the middle rio Itabapoana. Fish were collected monthly using two cast nets (thrown 30 times during the day) and gillnets kept in the river during 12 hour, from sunset to sunrise, between September 1997 and August 2000. Infestation pattern was investigated on 1358 specimens. Most of them were infested (57.9%), with one or two parasites; the majority (62.9%) was collected during the rainy season (spring-summer). The parasite did not show preference for sex or size of hosts. A total of 91.5% of the 511 examined parasites had a body size that represented 10.1% to 20% of host standard... Tipo: Info:eu-repo/semantics/article Palavras-chave: Body size; Prevalence of parasitism; Parasitic castration; Reproduction. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300008 Registros recuperados: 2 Primeira ... 1 ... Última

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