Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 4
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Eurytrema coelomaticum (Giard & Billet) (Digenea, Dicrocoeliidae) em Bradybaena similaris (Férussac) (Gastropoda, Xanthonychidae): alterações nos depósitos de cálcio e na função reprodutiva do primeiro hospedeiro intermediário Zoologia
Paschoal,Solange V.; Amato,Suzana B..
The influence of the parasitism by the digenetic trematode Eurytrema coelomaticum (Giard & Billet, 1892) over the calcium mobilization and the reproductive function of its first intermediate host, the snail Bradybaena similaris (Férussac, 1821) was experimentally studied in infected and uninfected snails maintained in laboratory under controlled conditions of nutrition, humidity and temperature. The calcium of the shells of infected and uninfected snails was quantified by using a technique of volumetric complexation. The amount of calcium present in the tissue was evaluated by using the histochemistry techniques of Dahl and von Kossa. The alteration in the reproductive function was evaluated through the egg production, and by histological follow up...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eurytrema coelomaticum; Bradybaena similaris; Calcium deposits; Parasitic castration.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200011
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
Revaluation of the taxonomic characters and distribution of Omalonyx geayi (Gastropoda, Succineidae) Iheringia, Sér. Zool.
Arruda,Janine O.; Barker,Gary M.; Thomé,José W..
ABSTRACT Omalonyx geayi Tillier, 1980 was originally described on the basis of specimens from Kaw swamp, French Guiana. This species distinguished from other of Omalonyx d'Orbigny, 1837: (i) by hermaphrodite duct twice as long and sacculate, without radial ducts but a funnel-shaped insertion on the ovariotestis, and (ii) by longitudinal wrinkled folds on the phallus inner wall. Two recent collections - from Trinidad and Carauari (Amazonas, Brazil) included specimens with ovariotestis and hermaphrodite duct morphologies similar to that originally described for O. geayi, but with phallus morphology not consistent with identification as O. geayi. A further eight lots, from Suriname, Ecuador, Brazil (Amazonas and Alagoas States), Bolivia and Cayenne-Kourou...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parasitic castration; Histology; Neotropical; Ovariotestis; Hermaphrodite duct.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100219
Registros recuperados: 4
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional