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| Registros recuperados: 672 | |
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| Arnaud, Christophe; Fillon, Alain. |
| Le littoral charentais-maritime présente, dans sa partie nord entre l'estuaire de la Charente et la limite nord du département (île de Ré comprise), plusieurs sites intéressant l'ostréiculture pour le captage de juvéniles, dont le centre réputé de Fouras. Pour aider la profession, et selon son souhait, une assistance est fournie par l' IFREMER qui recherche les périodes d'émission de larves d'huîtres creuses afin d'informer les ostréiculteurs des époques les plus propices au captage. Contractualisé pour la première fois en 1996 entre la SRC RE-CENTRE OUEST et l' IFREMER, ce travail a été effectué à nouveau en 1997 par le laboratoire côtier DEL de La Rochelle, suite au renouvellement de ce contrat. Le présent rapport expose les différents aspects de ce... |
| Tipo: Text |
Palavras-chave: Reproduction; Larves; Crassostrea gigas; Charente Maritime. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00049/16068/13529.pdf |
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| Le Moullac, Gilles; Hui, Belinda; Vonau, Vincent; Levy, Peva; Cochard, Jean-claude. |
| Preliminary experiments allowed defining basic requirements of Pinctada margaritifera for somatic and gonadic growth in controlled conditions. This study was continued by observation of the gametogenesis at a cellular level. In April/May 2008, 125 oysters were conditioned for 30 days in 25 tubular tanks (30 L). Water was renewed 4 times/hour. A mixed (v:v) diet of Isochrysis galbana (T-Iso) and Chaetoceros gracilis was supplied continuously. A control batch of 125 oysters was maintained in trays in the lagoon. An initial sample of 30 individuals was made. Gonadic changes were first characterized using a gonadal development index (GDI) based on the ratio of the gonad area to the total visceral mass area on a sagittal section of the body. Histological... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Reproduction; Gametogenesis; Broodstock. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00029/14010/11196.pdf |
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| La Douce, R.. |
| Sur l'initiative de M. Le Directeur de l'Office et en collaboration avec les ostréiculteurs, notamment M. THIEBLEMONT-COLSON de Carnac, des essais de captage du naissain portant sur différents types de collecteurs en carton- et en variant les enduits pour obtenir à la fois la rigidité et la conservation du support ainsi qu'une couche propice à une bonne fixation des larves - ont été poursuivis en 1951 dans les Stations expérimentales d'Arcachon, La Tremblade et Auray. Les Résultats des essais entrepris par MM. THIEBLEMONT CONSOL et MARTEIL à Auray, M. TROCHON à La Tremblade et M. LE DANTEC à Arcachon sont résumés ici. |
| Tipo: Text |
Palavras-chave: Conchyliculture; Collecteur; Captage naissain; Reproduction; Marennes Oléron; Auray; Arcachon. |
| Ano: 1952 |
URL: http://archimer.ifremer.fr/doc/00014/12514/9371.pdf |
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| Guevelou, Eric; Huvet, Arnaud; Galindo-sanchez, Clara E.; Milan, Massimo; Quillien, Virgile; Daniel, Jean-yves; Quere, Claudie; Boudry, Pierre; Corporeau, Charlotte. |
| The hermaphrodite Pacific oyster Crassostrea gigas displays a high energy allocation to reproduction. We studied the expression of AMP-activated protein kinase (AMPK) during gametogenesis in the gonad and characterized the mRNA sequences of the AMPK subunits: the AMPK alpha mRNA sequence was previously characterized; we identified AMPK beta, AMPK gamma, and mRNAs of putative AMPK-related targets following bioinformatics mining on existing genomic resources. We analyzed the mRNA expression of the AMPK alpha, beta, and gamma subunits in the gonads of male and female oysters through a reproductive cycle, and we quantified the mRNA expression of genes belonging to fatty acid and glucose metabolism. AMPK alpha mRNA levels were more abundant in males at the... |
| Tipo: Text |
Palavras-chave: AMP-activated protein kinase; Crassostrea gigas; Gametogenesis; Marine bivalve; Reproduction. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00168/27911/26470.pdf |
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| Duclerc, J; Sacchi, J; Piccinetti, C; Piccinetti-manfrin, G; Dicenta, A; Barrois, J-m. |
| Two international research cruises on board of the research vessel 'Ichthys' the first one in Aug-Sept 1971, and the second other in June-July 1972, have shown the reproduction of Thunnus thynnus, T.alalunga, Auxis thazard and Sarda in the surroundings of the Balearic Islands. The observations were made on the planctonic stages of these spp and on the physico-chemical and biological conditions of the environment. Some data were also collected on the presence of juvenile or mature stages of these fishes and on their fishery. |
| Tipo: Text |
Palavras-chave: Plankton; Eggs; Larvae; Physico chemical conditions; Mediterranean sea; Reproduction; Thunnidae; Bluefin tuna. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-2159.pdf |
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| Emerenciano, Mauricio; Cuzon, Gerard; Mascaro, Maite; Arevalo, Miguel; Norena-barroso, Elsa; Jeronimo, Gilberto; Racotta, Ilie; Gaxiola, Gabriela. |
| A 30-day trial was performed to evaluate the reproductive performance of wild and 2nd generation domesticated Farfantepenaeus duorarum broodstock. Changes in biochemical composition and fatty acids (FA) profile in the 1st and 4th spawn order females were used as indicators of nutritional condition. Wild population of F. duorarum presented significantly better reproductive outcomes as compared to domesticated ones. Wild spawners achieved significantly higher number of eggs per spawn, number of egg per spawn per g of spawner's body weight and number of nauplii per spawn (P<0.05). Latency period was significantly shorter (P<0.05) for wild than for domesticated females (11 vs 17 days). Wild spawners also presented less mortality (6 vs 12%), higher number... |
| Tipo: Text |
Palavras-chave: Fatty acids; F. duorarum; Lipids; Pink shrimp; Nutrition; Reproduction. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00079/19042/17214.pdf |
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| Kraffe, E; Tremblay, R; Belvin, S; Le Coz, Jean-rene; Marty, Y; Guderley, H. |
| In scallops, gametogenesis and spawning can diminish the metabolic capacities of the adductor muscle and reduce escape response performance. To evaluate potential mechanisms underlying this compromise between reproductive investment and escape response, we examined the impact of reproductive stage (pre-spawned, spawned and reproductive quiescent) of the giant scallop, Placopecten magellanicus, on behavioural (i.e., escape responses), physiological (i.e., standard metabolic rates and metabolic rates after complete fatigue) and mitochondrial capacities (i.e., oxidative rates) and composition. Escape responses changed markedly with reproductive investment, with spawned scallops making fewer claps and having shorter responses than pre-spawned or... |
| Tipo: Text |
Palavras-chave: Placopecten magellanicus; Sterols; Fatty acids; Plasmalogens; Phospholipids; Cytochrome C oxidase; Metabolic rate; Escape response; Muscle; Scallops; Reproduction; Mitochondria. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4786.pdf |
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| Pouvreau, Stephane; Bourles, Yves; Lefebvre, Sebastien; Gangnery, Aline; Alunno-bruscia, Marianne. |
| The Dynamic Energy Budget (DEB) model (Kooijman, S.A.L.M., 1986. Energy budgets can explain body size relations. J. Theor. Biol. 121, 269¿282; Kooijman, S.A.L.M., 2000. Dynamic Energy and Mass Budgets in Biological Systems. Cambridge University Press, Cambridge, 424 pp.) has been adapted to describe the dynamics of growth and reproduction of the Pacific oyster (Crassostrea gigas) reared in different areas under conditions ranging from controlled to natural. The values of the model parameters were estimated from available physiological data and from published information. The sets of data used to validate the model came from three long-term growth experiments (> 5 months) performed on Pacific oysters reared under different conditions of food and... |
| Tipo: Text |
Palavras-chave: Reproductive effort; Reproduction; Growth; Ecophysiology; Dynamic energy budget; Crassostrea gigas. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1817.pdf |
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| Trochon, Pierre. |
| La reproduction des huîtres plates dans les claires de la région de La Tremblade a été étudiée à partir de l'année 1953. Les premières observations permirent de constater dans ces plans d'eau la présence de larves en grand nombre au début de l'été ; mais la quantité des larves parvenues au stade de fixation demeurait toujours très faible. Néanmoins, sur des collecteurs immergés aux moments les plus favorables, de très faibles fixations furent obtenues. Il était donc démontré qu'il était possible de récolter des huîtres plates dans ces bassins. |
| Tipo: Text |
Palavras-chave: Reproduction; Huître plate; Ostrea edulis; Claires ostréicole; Marennes Oléron. |
| Ano: 1956 |
URL: http://archimer.ifremer.fr/doc/00005/11578/8203.pdf |
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| Bigot, Laetitia; Beets, Isabel; Dubos, Marie-pierre; Boudry, Pierre; Schoofs, Liliane; Favrel, Pascal. |
| Members of the short neuropeptide F (sNPF) family of peptides and their cognate receptors play key roles in a variety of physiological processes in arthropods. In silico screening of GigasDatabase, a specific expressed sequence tag database from the Pacific oyster Crassostrea gigas, resulted in the identification of a receptor (CgsNPFR-like) phylogenetically closely related to sNPF receptors (sNPFRs) of insects. A reverse endocrinology approach was undertaken to identify the peptide ligand(s) of this orphan receptor. Though structurally distinct from insect sNPFs, three RFamide peptides derived from the same precursor, i.e. GSLFRFamide, SSLFRFamide and GALFRFamide, specifically activate the receptor in a dose-dependent manner, with respective EC50 values... |
| Tipo: Text |
Palavras-chave: Oyster; Crassostrea gigas; SNPF; Energy metabolism; Reproduction; Starvation. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00207/31777/30188.pdf |
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| Moal, Jeanne; Bedier, Edouard; Fleury, Pierre-gildas; Langlade, Aime; Le Coguic, Yvette; Degremont, Lionel; Boudry, Pierre; Le Coz, Jean-rene; Pouvreau, Stephane; Enriquez-diaz, M.; Lambert, Christophe; Quere, Christele; Soudant, Philippe; Samain, Jean-francois. |
| Bi-parental families were produced in hatchery and tested in the field in 2001. Two sets of 5 families were constituted, selected on their high (R) and low (S) survival. These two sets were reared in Brittany from March to November 2002. Samplings were performed twice a month to obtain data on biometry, survival, reproductive cycle, biochemical composition, adenylate energy charge, hemolymph parameters (ions and defense system) and muscle strength. "R" and "S" oysters exhibited different reproductive effort and spawning strategy. "R" oysters allocated less energy in gonad than "S" ones and presented a complete spawning at the end of August contrary to the "S" which spawns partially. Mortality started in July when the seawater temperature reached 19 degree... |
| Tipo: Text |
Palavras-chave: Summer; Reproduction; Oyster culture; Mortality; Genetic diversity; Commercial species; Breeding. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-3345.pdf |
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| Soletchnik, Patrick; Goyard, Emmanuel; Thouard, Emmanuel. |
| Le travail présenté reprend les principales expérimentations menées en structures de petits volumes (40, 120 et 150 l). Elles ont permis de lever un certain nombre de points de blocages au cours de ces 3 années d'études. Les résultats de ces expérimentations menées en réplicats de 3 à 7 bassins par condition étaient immédiatement pris en compte dans les élevages "pilotes" menés parallèlement. Vingt-deux expérimentations ont été réalisées au cours de différentes phase de l'élevage, sur des thèmes aussi divers que la lumière, l'abondance et la qualité des proies, le sevrage précoce, le sevrage, les normes zootechniques eu prégrossissement. Ces résultats sont présentés dans ce 4ème document de la mise au point de l'élevage de l'ombrine subtropicale. |
| Tipo: Text |
Palavras-chave: Aquaculture; Elevage; Ombrine; Sciaenops ocellata; Reproduction; Zootechnie; Prégrossissement. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00133/24378/22390.pdf |
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| Desmarchelier, Manuela. |
| L'étude est axée principalement sur la reproduction, la croissance du Tacaud (Trisopterus luscus L.), ainsi que sur la répartition des individus à l'intérieur de la zone étudiée. Le Tacaud, poisson, gadidé, est une espèce côtière péchée artisanalement comme espèce accessoire. Les jeunes vivent à la côte; les adultes sont sur des fonds chalutables, à l'exception des plus âgés qui migrent sur des fonds rocheux. Notre étude a été réalisée à partir de chalutages expérimentaux et de l'analyse statistique des captures débarquées au port de Boulogne/mer. Le rythme de la reproduction a été déterminé, ainsi que l'âge et la taille à la première maturité sexuelle. On observe un décalage géoqraphique de la reproduction : Les populations vivant au nord mûrissent plus... |
| Tipo: Text |
Palavras-chave: Dynamique de population; Tacaud; Mer du Nord; Manche orientale Sud; Biométrie; Reproduction; Croissance; Trisopterus luscus. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/these-6943.pdf |
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| Boudry, Pierre; Launey, Sophie; Diaz-almela, E.; Naciri-graven, Yamama; Ledu, Christophe; Mira, Sara; Taris, Nicolas; Bonhomme, Francois; Lapegue, Sylvie. |
| Nowadays, PCR-based DNA markers allow the study of diversity and differentiation of marine organisms at different stages of their life cycle. Our study of European flat oyster (Ostrea edulis) populations has aimed to describe their spatial and temporal dynamics. First, we analyzed adults sampled over the natural range of the species. An Atlantic/Mediterranean differentiation pattern was observed. Results were congruent between allozymes, microsatellites and mitochondrial DNA and support an isolation by distance model. High variability was observed in the breadth of diversity between populations using a mitochondrial marker, this highlights the small effective population sizes in some locations. A 10-fold quantitative difference was observed in Fst... |
| Tipo: Text |
Palavras-chave: Larvae; Reproduction; Genetic; Ostrea edulis; European flat oyster; Population genetics. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/acte-3493.pdf |
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| Renault, Tristan; Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Guilpain, Patrice; Geairon, Philippe; Razet, Daniel; Seugnet, Jean-luc; Gagnaire, Beatrice; Kerdudou, Nolwenn. |
| Massive abnormal mortalities of flat oysters Crassostrea during the summer period are nothing new, and such episodes have been described in scientific literature for about forty years. Numerous studies demonstrate that there is not one single identified cause to this phenomenon and that it is, on the contrary, a combination of different parameters. This program proposes a multidisciplinary approach to the problem of summer mortality of C. gigas in which the working hypothesis is that these mortalities result from the interaction of three parameters: environment, host and pathogens. As a consequence, this program gathers all the necessary competences for the study of these interactions: competences in genetics, physiology, immunology, ecotoxicology,... |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Activité hémoctyaire; Synergie écologie côtière; Pathologie; Paramètres hémocytaires; Physiologie; Paramètres; Reproduction; Mortalités; Crassostrea gigas; Huîtres. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/acte-3404.pdf |
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| Registros recuperados: 672 | |
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