Consulta: subjectFacets:"Ovogenèse"
Registros recuperados: 3
Data/hora: 10/06/2024 14:18:55

Etude preliminaire des equilibres de distribution de l'eau et des ions au cours de l'ovogenese de Solea solea
Provedor de dados: 5
Autores: Gallis, J; Lemenn, F; Lebrun, A; Nunez, R.
During oogenesis of Solea solea L., gonadal changes in water, Na super(+) and K super(+) ions seem to be related to yolk protein incorporation by the oocyte. The decrease in oocyte water accumulation, associated with an increase in pericellular water accumluation and a decrease in K super(+) concentration occurs when vitellogenin enters the oocyte. Na super(+) concentration decreases in the oocyte at the end of the exogenous vitellogenesis when the first stages of the oocyte maturation take place. Water accumulation in the pericellular space during vitellogenesis allows the rapid transfer of water from this compartment into the oocyte during the terminal phase of maturation. However the total amount of gonadal water remains stable.
Tipo: Text
Palavras-chave: Solea solea; Soleidae; Pisces; Hydration; Water content; Ion accumulation; Sexual maturity; Ovaries; Oogenesis; Solea; Maturation ovocytaire; Ovogenèse; Eau; Ions.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1231.pdf

Compte rendu des premières expérimentations de fécondation artificielle chez l'ombrine, Sciaenops ocellatus : études préliminaires de la maturation finale des ovocytes et de la qualité du sperme
Provedor de dados: 5
Autores: Gardes, Lionel; Buchet, Vincent; Villanove, Philippe; Fauvel, Christian.
Artificial insemination mastery in red drum, Sciaenops ocellatus, requires a first experimental step wOOng at getting basic biological data. Regarding males, a relation between optical density of the solution (OD) measured by spectrophotometry and sperm concentration (SC) has been established : OD O,161*SC + 0,119. Mean sperm concentration measured is 4,36.10 10 spz.mL-1.  This study shows an influence of the solution of dilution on spermatozoa motility and its evolution during short term preservation. As far as females are concemed, the follow-up of final maturation through the observation of samples taken during reguIar strippings, seems to he a good technique to limit overripening and spontaneous liheration of ovules. Some artificial insemination trials...
Tipo: Text
Palavras-chave: Fécondation artificielle; Concentration spermatique; Motilité du sperme; Ovogenèse; Ovulation; Sur maturation; Ombrine; Sciaenops ocellatus.; Artificial insemination; Sperm concentration; Sperm motility; Oogenesis; Ovulation; Overripening; Red drum.; Sciaenops ocella/us.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00366/47755/47801.pdf

Etude de la gametogenese chez le poulpe Octopus vulgaris (Cuvier, 1797)
Provedor de dados: 20
Autores: Ould Mohamed Fall, K.
L’étude de la gamétogenèse chez le poulpe (Octopus vulgaris) a été réalisée par observations histologiques des gonades mâles et femelles. L’ovogenèse chez les céphalopodes est marquée par une dynamique de cellules folliculaires. Celles-ci, organisées en entités appelées follicules, vont se multiplier dans le tissu conjonctif de l’ovaire et migrer vers les ovocytes pour les entourer. Elles vont par la suite former des replis dans le cytoplasme et participer à la synthèse du vitellus. La production progressive de vitellus entraîne la rupture du follicule et la libération de l’ovocyte dans la cavité ovarienne. La maturation des cellules sexuelles mâles se fait de façon centripète dans des entités appelées cystes. Les spermatogonies, situées à la périphérie...
Tipo: Journal Contribution
Palavras-chave: Follicule; Poulpe; Ovogenesis; Ovogenèse; Spermatogenis; Cyste; Spermatogenèse; Fellules folliculaires; Ovocyte; Follicula cells; Octopus fisheries; Sexual maturity.
Ano: 2001
URL: http://hdl.handle.net/1834/217