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| Registros recuperados: 672 | |
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| Ducrou, John; Arnaud, Christophe. |
| The Charente coast has, from its northern to its southern boundary, a number of natural cupped oyster (Crassostrea gigas) collection areas interesting professionals who wish to renew their stocks. This study carried out on behalf of the oyster culture professionals and in the framework of the Ifremer/SRC contract, is entitled "Ifremer's action for the Regional Shellfish Culture Section of the Marennes-Oléron basin". It has three purposes: - Spotting larval emissions, - Monitoring the future of the larval colonies, - Enabling the providing of information to oyster professionals early enough for them to set up their collection devices. In 2002, mussel "Mytilus edulis" larvae have been collected at the "Boyard" point. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Larves; Captage; Mytilus edulis; Moules; Crassostrea gigas; Huîtres; Reproduction. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/rapport-6573.PDF |
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| Lacoste, Elise; Le Moullac, Gilles; Levy, Peva; Gueguen, Yannick; Gaertner-mazouni, Nabila. |
| In bivalve aquaculture, dominant fouling organisms are filter feeders which can compete for food with reared bivalves, sometimes causing mortality or reducing their growth rate. This study investigated the effect of biofouling on the farmed pearl oyster Pinctada margaritifera in two lagoons of French Polynesia. Survival, growth and reproduction of 2 year-old pearl oysters were monitored with regular sampling schedules, from the initial stage of colonization up to 20 months of biofouling accumulation. Control groups of pearl oysters were kept free of biofouling as is the current practice in pearl farms. After more than a year of monitoring, no significant difference was recorded in shell growth rate between pearl oysters reared with epibionts and the... |
| Tipo: Text |
Palavras-chave: Pearl oyster culture; Pinctada margaritifera; Biofouling; Growth; Reproduction. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00201/31188/29587.pdf |
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| Samain, Jean-francois; Degremont, Lionel; Soletchnik, Patrick; Ropert, Michel; Bedier, Edouard; Mazurie, Joseph; Mazurie, Joseph; Martin, Jean-louis; Moal, Jeanne; Mathieu, Michel; Pouvreau, Stephane; Lambert, Christophe; Escoubas, Jean-michel; Nicolas, Jean-louis; Le Roux, Frédérique; Renault, Tristan; Burgeot, Thierry; Bacher, Cedric; Boudry, Pierre. |
| Complex interactions between oyster, environment and pathogens were observed during the MOREST (2001-2005) project on summer mortality events of Crassostrea gigas oysters in France. The talk will show how nutrition level increasing reproductive intensity generates a risk for pathogen infection under synergistic effect of temperature and stress. Moreover, a genetic component is associated to specific reproductive performances and spawning behaviour. To better understand origin of such resistance or susceptibility to summer mortality, other characteristics as stress susceptibility, energy management and hemocyte activities of oysters from the two phenotypes were compared. This first comparison suggests interactions between stress, reproduction and defence... |
| Tipo: Text |
Palavras-chave: Genetic; Pathologie; Mortality; Crassostrea gigas; Pacific oyster; Reproduction; Nutrition; Physilogy. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/2006/acte-3467.pdf |
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| Gras, Paul; Comps, Michel; David, A.; Baron, G.. |
| During the summer of 1970 mortality started in the Marennes-Oléron Basin which affected successively adult oysters, 18 year-old oysters and then the oyster spats collected the same year. Only the Portuguese oyster (Crassostrea angulata) was dying whereas the Pacific oyster (Crassostrea gigas) showed total resistance. The abnormal fixation of the 1970 spats, followed by an important mortality in this latter, and the large decrease of adult oyster stocks, and therefore of genitors, were also a reason for oyster farmers to worry as the new reproduction season was about to start. Some measures had to be taken in order to compensate for the lack of genitors susceptible of producing a tough and vivacious spat. The good results obtained for a few years with C.... |
| Tipo: Text |
Palavras-chave: Naissain; Larves; Marennnes Oléron; Crassostrea gigas; Reproduction. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-6446.PDF |
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| Sussarellu, Rossana; Suquet, Marc; Thomas, Yoann; Lambert, Christophe; Fabioux, Caroline; Pernet, Marie Eve Julie; Le Goic, Nelly; Quillien, Virgile; Mingant, Christian; Epelboin, Yanouk; Corporeau, Charlotte; Guyomarch, Julien; Robbens, Johan; Paul-pont, Ika; Soudant, Philippe; Huvet, Arnaud. |
| Plastics are persistent synthetic polymers that accumulate as waste in the marine environment. Microplastic (MP) particles are derived from the breakdown of larger debris or can enter the environment as microscopic fragments. Because filter-feeder organisms ingest MP while feeding, they are likely to be impacted by MP pollution. To assess the impact of polystyrene microspheres (micro-PS) on the physiology of the Pacific oyster, adult oysters were experimentally exposed to virgin micro-PS (2 and 6 µm in diameter; 0.023 mg·L−1) for 2 mo during a reproductive cycle. Effects were investigated on ecophysiological parameters; cellular, transcriptomic, and proteomic responses; fecundity; and offspring development. Oysters preferentially ingested the 6-µm micro-PS... |
| Tipo: Text |
Palavras-chave: Microplastic; Reproduction; Energy allocation; Oyster. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00311/42233/41600.pdf |
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| Cavelier, Patricia; Cau, Julien; Morin, Nathalie; Delsert, Claude. |
| While our knowledge of bivalve gametogenesis has progressed in recent times, more molecular markers are needed in order to develop tissue imaging. Here, we identified stem cell and mitotic markers to further characterize oyster early gametogenesis, mainly through immunofluorescence microscopy. Intense alkaline phosphatase activity, a non-specific marker for stem cells, was detected on the outer edge of the gonad ducts at the post-spawning stage, suggesting an abundance of undifferentiated cells very early during the sexual cycle. This observation was confirmed using an antibody against Sox2, a transcription factor specific for stem or germline cells, which labeled cells in the gonad duct inner mass and ciliated epithelium early during the initial oyster... |
| Tipo: Text |
Palavras-chave: Germline cells; Cell cycle; Reproduction; Bivalve; Marine invertebrates. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00409/52100/52809.pdf |
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| Tous, Philippe. |
| The growth study of s tripped Mullet, from the Bay of Biscaye, from April to June is managed by scale reading. Sorne difficulties appear with the interpretation female scales. The Analysis of ovaries confirms that spring is the period of reproduction, and shows that the age of first reproduction is two year (65 %) or one year old (35 %). Secondly, the exploitation of various statistic data shows the evolution of landings of Stripped Mullet in several harbours, and especially in les Sables d'Olonne, since 1962. The reconstitution of the artisan trowlers effort in this harbour confirms the long decline of c.p.u.e . for Mullus surmuletus, and a rapid increase since 1981. The problem of the lack of data about the inshore fishery and about the composition of... |
| Tipo: Text |
Palavras-chave: Reproduction; Croissance; Golfe de Gascogne; Chalutiers artisans et côtiers; CPUE. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00455/56649/58390.pdf |
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| Lloret, Josep; Serrat, Alba; Þórðarson, Guðmundur; Helle, Kristin; Jadaud, Angelique; Bruno, Isabel; Ordines, Francesc; Sartor, Paolo; Carbonara, Pierluigi; Rätz, Hans-joachim. |
| Many deep‐water fish populations, being k‐selected species, have little resilience to overexploitation and may be at serious risk of depletion as a consequence. Sea warming represents an additional threat. In this study, the condition, or health, of several populations of common ling (Molva molva), blue ling (M. dypterygia) and Mediterranean or Spanish ling (M. macrophthalma) inhabiting different areas in the North Atlantic and the Mediterranean was evaluated, in order to shed light on the challenges these deep water species are facing in the context of fishing activity and a warming climate. The data on the condition of Molva populations which we analyze here has been complemented with data on abundance and, for the southernmost species (Mediterranean... |
| Tipo: Text |
Palavras-chave: Condition; Parasitism; Reproduction; Deep‐water fish; Fisheries; Sea warming. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00623/73502/72808.pdf |
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| Roos, David; Roux, Olivier; Conand, François. |
| The main characteristics of the biology of bigeye scad were studied from commercial fishery catches around Reunion Island. Biometric relationships were calculated. The monitoring of size distribution, aggregated by month, allowed us to estimate the theoretical growth equation using the ELEFAN software. The von Bertalanffy growth parameters were adjusted with a seasonal modulation: L8 = 265 mm; K = 1.64 year-1; c = 0.068; ? = 0.38. The growth of the cohort was quite high during the austral summer (November-April) and decreased during the austral winter (May-October). The arrival of a new cohort with homogeneous small sizes (65 to 90 mm) in the fishery in November coincided with the disappearance of large individuals. A feature of the reproductive biology... |
| Tipo: Text |
Palavras-chave: Indian Ocean; Reunion Island; Growth; Reproduction; Selar crumenophthalmus; Carangidae. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2335.pdf |
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| Registros recuperados: 672 | |
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