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Registros recuperados: 28
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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 ArchiMer
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
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Cycle sexuel des femelles de sandre Stizostedion lucioperca (L.,1758) Pisces, Percidae) dans la retenue du barrage de Sidi Salem (Tunisie) OceanDocs
Missaoui, H.; Toujani, R.; Romdhane, M.S..
Durant la période mars 1996 - mars 1997, nous avons suivi sur un échantillon de 720 individus, l’état de la maturité sexuelle des femelles de sandre Stizostedion lucioperca peuplant la retenue du barrage de Sidi Salem (nord de la Tunisie). Parallèlement, une étude basée sur des coupes histologiques a été réalisée sur un échantillon de 65 femelles (taille moyenne = 35 cm, poids moyen = 522 g et âge moyen = 1,8 ans). Ces travaux ont permis de montrer que: - l’âge de la première maturité sexuelle des femelles est d'un an pour une taille de 24 cm et un poids de 90 g. - la fécondité relative est de 200 œufs / g de poids corporel et la fécondité absolue F est fortement corrélée avec le poids W (F=632 *W 0,77), la taille L (F=6760*L  148372) et l'âge t...
Tipo: Journal Contribution Palavras-chave: Spawning; Fecundity; Freshwater fish; Oogenesis; Sexual maturity.
Ano: 2010 URL: http://hdl.handle.net/1834/4288
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Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil Zoologia
Garcia,José Antônio Dias; Chini,Helena A.S.; Maistro,Edson Luis; Quagio-Grassiotto,Irani.
Oogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Teleostei; Characidae; Astyanax fasciatus; Oogenesis; Cytochemical.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400003
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Dynamics and cytochemistry of oogenesis in Leporinus striatus Kner (Teleostei, Characiformes, Anostomidae) from the Rio Sapucaí, Minas Gerais State, Brazil Zoologia
Chini,Helena A.S.; Garcia,José Antônio Dias; Maistro,Edson Luis; Quagio-Grassiotto,Irani.
Oogenesis involves a sequense of transformations which are undergone by female germ cells. These cells change into oogonias and then into mature oocytes. Sexually mature females were collected monthly, during one year, from the Rio Sapucaí, tributary of the Rio Grande, which is part of the Furnas Reservoir system in the state of Minas Gerais. The observed material showed that oogonias were small spherical cells, had a big spherical nucleus, with a single nucleolus, and weakly stained cytoplasm with eosinophilic granules (FG stained), which indicate their protein content. The primary oocytes showed a big basophilic nucleus, with a large peripheral nucleolus, and several smaller nucleoli. They show a reduced cytoplasmic content. The previtellogenic oocytes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Teleostei; Anostomidae; Leporinus striatus; Oogenesis; Cytochemical.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400004
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Efficiency of in vivo embryo production using sorted semen in cattle. Repositório Alice
FIGUEIREDO, A. C. S.; FERNANDES, C. A. C.; NERI, H. L. H.; PEREIRA, G. H. S.; PEREIRA, J. R.; VIANA, J. H. M.; VIEIRA, M. R..
bitstream/item/185493/1/p438-SBTE.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Folliculogenesis; Oogenesis; Superovulation.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1098859
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Etude preliminaire des equilibres de distribution de l'eau et des ions au cours de l'ovogenese de Solea solea ArchiMer
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
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Gametogenesis and nucleotypic effects in the tetraploid red vizcacha rat, Tympanoctomys barrerae (Rodentia, Octodontidae) Biol. Res.
GALLARDO,MILTON H; GARRIDO,ORLANDO; BAHAMONDE,RAÚL; GONZÁLEZ,MARCELO.
Nucleotypic effects link DNA content with nuclear size and cell dimensions of reproductive cells in polyploid organisms. We studied the gametogenesis of the allotetraploid rodent Tympanoctomys barrerae, aiming to determine these effects in reproductive cells. The species' cofamily members, Octodon degus and Spalacopus cyanus were used as control. Spermatogenesis and oogenesis in T. barrerae follows the pattern of differentiation and sequence of events of the control species, but varied nucleotypic effects were observed. Exceedingly large, spatulated spermatozoa with a submedially attached flagellum are characteristic of male T. barrerae. The diameter of the nuclei of primordial and growing follicles as well as those of the Graaff follicles, of the...
Tipo: Journal article Palavras-chave: Nucleotypic effects; Oogenesis; Spermatogenesis; Octodontidae; Tympanoctomys barrerae; Tetraploidy.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000500006
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Gametogenesis and reproductive cycle of Melanorivulusaff. punctatus (Boulenger, 1895) (Cyprinodontiformes, Rivulidae) in Chapada dos Guimarães, Mato Grosso, Brazil Neotropical Ichthyology
Cassel,Mônica; Mehanna,Mahmoud; Mateus,Lúcia; Ferreira,Adelina.
The comprehension of the reproductive cycle allows to understand which are the morphological changes that develop in the gonad during this interval. Thus, many studies have been undertaken in order to describe and classify the stages of gonadal development and reproductive status of Neotropical fishes. For this purpose, specimens of Melanorivulusaff. punctatus were collected in a permanent dam in Chapada dos Guimarães, Mato Grosso, Brazil. The gonads were prepared for analysis by light microscopy. The oogenesis and spermatogenesis have been described, characterizing the stages of gonadal development, together with assessments of the gonadosomatic ratio, germ cell count and verification of variation of mature oocytes in females. Throughout the year the male...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gonadossomatic ratio; Histology; Oogenesis; Spermatogenesis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100179
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Gross morphology and ultrastructure of the female reproductive system of Diaphorina citri (Hemiptera: Liviidae) Rev. Bras. Zool.
Dossi,Fabio Cleisto Alda; Cônsoli,Fernando Luis.
The morphological traits of the female reproductive system of Diaphorina citri were examined in detail. Diaphorina citri has telotrophic ovaries with ovarioles organized as a "bouquet", displaying a rudimentary terminal filament and a syncytial tropharium. The vitellarium carries a single growing oocyte at each maturation cycle, which is connected with the tropharium by a nutritive cord. Morpho-functional changes occur during oocyte development, mainly during mid to late vitellogenesis. Morphological events such as the patency of the follicular cells and the intense traffic of vesicles through para- or intracellular processes, suggest a possible route for endosymbiont invasion of D. citri reproductive tissues. Similar events have been demonstrated to be...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Accessory structures; Asian citrus psyllid; Oogenesis; Ovary.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000200007
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Histological characterization of oocyte developmental stages of suruvi Steindachneridion scriptum kept in captivity Animal Sciences
Abreu, Mariana Roza; Garcia, Patrícia; Zaniboni-Filho, Evoy.
Stages of oocyte development were described for suruvi females (Steindachneridion scriptum) kept in captivity. Oocytes of 21 mature or maturing females and ovaries of 12 immature females were fixed in Karnovsky solution for 4 and 12 hours, respectively. After, they were processed for routine histology, embedded in paraffin and stained with hematoxylin-eosin. Slides were examined under a light microscope and the oocytes were measured using the LAS EZ software, using the average between the largest and the smallest diameter of each oocyte for representation. There were six types of oocytes: Chromatin nucleolus: found in immature females, with average diameter of 9.5 ± 4.46 μm; Perinucleolar: present in all developmental stages with average diameter of 67.6 ±...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.05.04.00-2 histology; Oogenesis; Fish reproduction; Vitellogenesis..
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27570
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Isolement et caracterisation d'une proteine membranaire ovocytaire capable de fixer specifiquement la vitellogenine ArchiMer
Jugan, P; Vanherp, F.
After solubilization of ovocyte-membranes from the crayfish Orconectes limosus , a component with a molecular weight of 30 kDa and capable to fix vitellogenin specifically, could be characterized by SDS-PAGE and by electroblotting. Because this isolated component is sensible to the digestion of proteolytic enzymes such as pronase, it is assumed that it is a protein. A polyclonal antiserum is produced against this component and its tissue-specificity is verified by ELISA.
Tipo: Text Palavras-chave: Orconectes limosus; Malacostraca; Oogenesis; Biochemical analysis; Cell membranes.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1382.pdf
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La vitellogenese chez Patella coeruelae LMK (Mollusca, Gasteropoda). Approche ultrastructurale ArchiMer
Benmeradi, N.
During the reproductive period, the microscopical observation of Patella coerulea ovary shows some ovogonies forming neets, supported by a conjonctive network, previtellogenic oocytes which leave gradually the conjonctive tissue and vitellogenic oocytes isolated in the acinus lumen. In early stages of previtellogenesis, an important nucleolar activity, caracterised by cloud-shaped or nematosomes and ribonucleoproteinic extrusions in cytoplasm compartment can be observed. At the end of this stage, the oocyte becomes richer in organites, mitochondria, granular endoplasmic reticulum and Golgi. We further notice the outcome of the first vitellin platelets. Production of vitellus is higher as three kinds of vitellus are observed in the following order: dark...
Tipo: Text Palavras-chave: Ultrastructure; Oogenesis; Sexual reproduction; Vitellogenesis.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-1720.pdf
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Les cellules folliculaires secondaires de la crevette Macrobrachium rosenbergii (Decapoda, Palaemonidae): Mise en evidence d'un reseau tubulaire implique dans les echanges entre l'hemolymphe et l'ovocyte ArchiMer
Meuzy, J; Jugan, P; Zerbib, C.
The epithelial cells of the ovary secondary follicles have been studied in the prawn Macrobrachium rosenbergii using electron microscope and horseradish peroxidase. A network of circomvolutioned and anastomosed tubules, measuring about 0.15 mu m in diameter, communicates with the extracellular space. This tubular network is a temporary structure which extensively increases the permeability of the follicular epithelium.
Tipo: Text Palavras-chave: Macrobrachium rosenbergii; Malacostraca; Ultrastructure; Oogenesis; Morphogenesis; Epithelia; Ovaries; Vitellogénine; Réseau tubulaire; Epithelium folliculaire; Vitellogenèse; Macrobrachium rosenbergii.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1189.pdf
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Oocyte development and ovarian maturation of the black triggerfish, Melichthys niger(Actinopterygii: Balistidae) in São Pedro e São Paulo Archipelago, Brazil Neotropical Ichthyology
Branco,Ilka S. L.; Viana,Danielle L.; Félix,Renata T. S.; Véras,Dráusio P.; Hazin,Fábio H. V..
The oogenesis is a key stage in the reproductive development of an organism, which can be best understood from histological analysis of ovaries in different maturity stages. In order to provide information on the reproductive biology of the black triggerfish, M. niger, in particular on its oogenesis process, this study aimed at identifying and characterizing the oocyte development stages and its organization within the different stages of ovarian maturation based on specimens from São Pedro e São Paulo Archipelago. In this present report, a number of 294 ovaries were histologically analyzed. It was verified that they are composed of ovigerous lamellae containing oocytes at different development stages. Five different stages of oogenesis were identified:...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Histology; Oogenesis; Reef fish; Reproduction; Vitellogenesis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300597
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Oogenesis and egg development in triatomines: a biochemical approach Anais da ABC (AABC)
Atella,Georgia C.; Gondim,Katia C.; Machado,Ednildo A.; Medeiros,Marcelo N.; Silva-Neto,Mário A.C.; Masuda,Hatisaburo.
In triatomines, as well as in other insects, accumulation of yolk is a process in which an extra-ovarian tissue, the fat body, produces yolk proteins that are packed in the egg. The main protein, synthesized by the fat body, which is accumulated inside the oocyte, is vitellogenin. This process is also known as vitellogenesis. There are growing evidences in triatomines that besides fat body the ovary also produces yolk proteins. The way these yolk proteins enter the oocyte will be discussed. Yolk is a complex material composed of proteins, lipids, carbohydrates and other minor components which are packed inside the oocyte in an organized manner. Fertilization triggers embryogenesis, a process where an embryo will develop. During embryogenesis the yolk will...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oogenesis; Vitellogenesis; Embryogenesis; Triatomines; Rhodnius prolixus.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000300005
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Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure Biocell
Ravaglia,Mario Aldo; Maggese,María Cristina.
Synbranchus marmoratus (Synbranchidae), commonly known as the swamp eel, is a protogynous diandric teleost fish widely distributed throughout South America. The purpose of this work was to study the ovarian anatomy and to describe oocyte developmental stages in the swamp eel, Synbranchus marmoratus. S. marmoratus has a unique sacular ovary. It is covered by a conspicuous muscular wall, probably involved in an egg-releasing system acting as a peristaltic-like mechanism. The internal ovarian anatomy shows a U-shaped ovarian lamella delimiting a dorsal ovarian lumen. The microscopic study shows evidence of the existence of a germinal epithelium in the inner surface of the lamella, which contains germinal cells, pre-follicular cells and epithelial cells. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Synbranchidae; Ovarian anatomy; Oogenesis; Micropyle.
Ano: 2002 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452002000300003
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Ovarian histology and fecundity in the evaluation of the reproduction of the invasive species Serrasalmus marginatus (Characidae) on a neotropical floodplain Biological Sciences
Melo, Gabriele Sauthier Romano de; Santana, Herick Soares de; Tos, Claudenice Dei.
 The construction of the Itaipu Hydroelectric Power Plant in 1982 led to the formation of a reservoir, which, in turn, leveled the waters of the Paraná River by flooding the geographic barrier Salto de Sete Quedas. This allowed the piranha Serrasalmus marginatus to invade and colonize the upper Paraná River. This study aimed to: i) confirm, through light microscopy, the reproductive phases of S. marginatus females; ii) estimate fecundity and iii) evaluate the reproduction areas of the population. A total of 764 females were collected from nine sampling sites on the upper Paraná River floodplain. Microscopic analysis of the ovaries showed the following phases: early developing subphase, developing phase, spawning capable phase, actively spawning subphase,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.05.02.00-1 Indeterminate fecundity; Type of spawning; Oogenesis; Oocytes; Piranha. Ecologia de Ecossistemas.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/33021
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Ovary development, egg production and oviposition for mated and virgin females of the predator Podisus nigrispinus (Heteroptera: Pentatomidae) - doi: 10.4025/actasciagron.v33i4.6694 Agronomy
Soares, Marcus Alvaranga; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Batista, Joana Darc; Universidade Federal de Viçosa; Zanuncio, José Cola; Universidade Federal de Viçosa; Lino Neto, José; Universidade Federal de Viçosa; Serrão, José Eduardo; Universidade Federal de Viçosa.
The Asopinae insects are generalist predators, and Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) is the most studied species of this group in Brazil. The objective was to study ovarian development, egg production and oviposition of mated and virgin P. nigrispinus females. Five 24-hours-old females were dissected and the ovaries were analyzed. Fifteen females of this predator were mated (T1), and another fifteen were individualized without mating (T2). The ovaries of five females per treatment were dissected and mature and immature eggs were counted. Five virgin females of P. nigrispinus at twenty days old were also analyzed. Twenty-four-hours-old P. nigrispinus females had low ovary development without the evidence of oocyte production. The...
Tipo: Pesquisa de laboratório Palavras-chave: 5.01.02.02-8 biological control; Insect physiology; Oogenesis; Progeny; Reproduction Entomologia Agrícola biological control; Insect physiology; Oogenesis; Progeny; Reproduction.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6694
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Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods PAB
Navarro,Fernanda Keley Silva Pereira; Navarro,Rodrigo Diana; Murgas,Luis David Solis; Pereira,Marina Apocalypse Nogueira; Hundley,Guilherme Crispim.
The objective of this work was to evaluate the effect of photoperiod on luteinizing hormone (LH) plasma levels and gonadal maturation of lambari females. One hundred and twenty adult lambaris, distributed into 12 aquaria of 20 L each, were randomly subjected to three different treatments, in a completely randomized design, and four replicates. Treatments were photoperiods in hours of light (L) and darkness (D): T1, 0 L:24 D; T2, 12 L:12 D; T3, 24 L:0 D. After 40 days, fish were subjected to fasting for 24 hours and, then, anesthetized. Immediately after slaughter, fish were weighed, and their gonads and livers were removed and weighed. Ovaries were weighed and immersed in Bouin's fixative solution for 24 hours and, then, kept in 70% alcohol until...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Astyanax bimaculatus; Native species; Gonadosomatic index; Hepatosomatic index; Oogenesis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800039
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Protein content and electrophoretic profile of fat body and ovary extracts from workers of Melipona quadrifasciata anthidioides (Hymenoptera, Meliponini) Iheringia, Sér. Zool.
Oliveira,Vagner T. Paes de; Cruz-Landim,Carminda da.
Workers of Melipona quadrifasciata anthidioides (Lepeletier, 1836) develop their ovaries and lay eggs, therefore the production of vitellogenin is expected. In electrophoretic profiles only fat body extracts from nurse workers and ovary extracts from newly-emerged workers show protein with molecular mass similar to vitellogenin. However, an increase in the protein content was detected in forager fat body. This increase was attributed to storage of vitellogenin or other proteins in the previous phase and not discharged into the hemolymph or to an effect of the increased titre of juvenile hormone in this phase of worker life over the fat body functioning.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stingless bees; Fat body; Ovary; Vitellogenin; Oogenesis.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000400010
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