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| Registros recuperados: 20 | |
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| Baud, Jean-pierre; Brisset, Emmanuelle; Cardinal, Mireille. |
| Une étude d'affinage contrôlé en bassin de l'huître creuse Crassas/rea gigas a été réalisée en novembre 1991 par "IFREMER de Bouin (Vendée). Cinq tonnes d'huîtres ont été nourries avec la diatomée Skeletonema costatum produite sur eau salée souterraine à raison de 1,2 X 10(9) cellules/individus/jour. L'affinage a été réalisé dans un bassin bétonné de 500 m2 muni d'une rampe de bullage d'air à une densité de 11 kg/m2 de coquillages. L'influence de différents paramètres sur l'affinage a été testée à l'aide d'un plan factoriel incluant : La taille des huîtres (86,8g ± 3,8 ; 69,5g ± 3,2 ; 53,1g.± 2,3), la technique de stockage (au sol, en casier surélevé, en poche surélevée) et la situation des huîtres par rapport à l'injection du phytoplancton (alimentation,... |
| Tipo: Text |
Palavras-chave: Affinage contrôlé; Crassostrea gigas; Skeletonema costatum; Glycogène. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00048/15882/13304.pdf |
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| Baron, Regis; Couedel, Marielle; Joret, Camille; Garen, Pierre; Truquet, Philippe; Masselin, Pierre; Bardouil, Michele; Lassus, Patrick. |
| A simple system was used to simulate the effect of alternating toxic (paralytic shellfish poisoning toxins) and non-toxic microalgal diets on oyster feeding behaviors and rates of toxin accumulation. These experimental conditions were meant to reflect, to some extent, the incoming and outgoing fluxes of toxic algae observed at the mouth of the Penze estuary (Northern Brittany, France). Physiological and toxicological parameters were estimated based oil fluorescence measurements recorded continuously at the outlet of each experimental tank, which contained a single oyster. Q(tox), this variable describes toxin uptake in oysters, it was used (instead of the toxin ingestion rate): i) in simple graphical analyses, ii) as well as in one- and two-compartment... |
| Tipo: Text |
Palavras-chave: Skeletonema costatum; Alexandrium minutum; Fluorescence; Modeling; Kinetics; Toxin uptake; Shellfish toxin; PSP. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1400.pdf |
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| Haure, Joel; Huvet, Arnaud; Palvadeau, Hubert; Nourry, Max; Martin, Jean-louis; Boudry, Pierre; Penisson, Christian. |
| A comparative study of the growth of the oysters Crassostrea gigas, Crassostrea angulata and their hybrids was carried out in 1999 in system controlled with contribution of the micro alga Skeletonema costatum. The results showed significant differences of the pondéral growth of the four studied progenies. The animals C. gigas had growth rates 1.4 times greater than C. angulata oysters. The hybrid progenies were shown more powerful than Portuguese oysters but are not different from the Japanese oysters. The ecophysiologic study showed that the averages of filtration and oxygen uptake, obtained by means of a three hours recording, cannot differentiate the four studied progenies. On the other hand, the calculation of the FTA (Feeding Time Activity) allowed to... |
| Tipo: Text |
Palavras-chave: Skeletonema costatum; Hybrids; Crassostrea angulata; Crassostrea gigas; Ecophysiology; Growth; Skeletonema costatum; Hybrides; Crassostrea angulata; Crassostrea gigas; Ecophysiologie; Croissance. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/rapport-1636.pdf |
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| Brault, Isabelle; Baud, Jean-pierre; Haure, Joel. |
| L'étude de faisabilité de l'élevage intensif de l'huître plate Ostrea edulis en bassin (enceinte contenant 8 niveaux de casiers d'élevage empilés) permet d'établir un premier bilan sur cette technique: Aspects positifs: - Obtention d'une croissance homogène quelque soit le niveau d'élevage dans la colonne d'eau durant les trois saisons étudiées (printemps, été, automne), - Adéquation entre la ration alimentaire de phytoplancton (Skeletonema costatum) et la densité de coquillages à trois tailles différentes (1.10(9) cellules de phytoplancton). Seule la densité de 400 individus par casier pour les juvéniles (P) pourrait être augmentée. Aspects négatifs: - Mise en évidence d'une relation décroissante entre le coefficient de croissance (G30) et la taille des... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Ostrea edulis; Skeletonema costatum. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00048/15876/13298.pdf |
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| Bacher, Cedric; Baud, Jean-pierre. |
| Seasonal growth of juvenile oysters (Crassostrea gigas) kept in an intensive upwelling system was studied from 1984 to 1986 in 60 to 90-day growth experiments. Saline ground water was used to produce Skeletonema costatum which was injected as food into the water supplying the upwelling system. Oyster density, water flow, phytoplankton concentration, temperature and frequency of food addition were controlled. Oyster growth was analysed with multidimensional contingency tables and correspondence analysis. The factors, in order of decreasing influence on growth, were temperature, food concentration and oyster density. A rearing strategy was deduced from the growth analysis for summer and winter. In summer, the density of 120,000 oysters/m2, the flow rate of... |
| Tipo: Text |
Palavras-chave: Nursery; Growth; Correspondence analysis; Multidimensional contingency table analysis; Economic efficiency; Skeletonema costatum; Crassotrea gigas; Nourriture; Croissance; Analyse des correspondances; Table de contingence multidimensionnelle; Rentabilité économique; Skeletonema costatum; Crassostrea gigas. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/publication-3061.pdf |
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| Sauriau, P; Baud, Jean-pierre. |
| Based on Coulter Counter data, a new method is proposed to study the influence of the polymorphous variability in size as well as in shape of the diatom species Skeletonema costatum on the physiological performances of the Manila clam Ruditapes philippinarum . Three conditions are required in order to convert volumetric data determined with the Coulter Counter into metric data, i.e. (1) stability of the pervalvar diameter of the diatom chains, (2) statistical independence between length and pervalvar diameter of the diatom chains, and (3) negligible level of coincident passages through the aperture orifice. Under these three conditions, the mean length (l) of a S. costatum chain can be related to the mean pervalvar diameter (d) of diatom chains and to the... |
| Tipo: Text |
Palavras-chave: Bivalvia; Skeletonema costatum; Bacillariophyceae; Algae; Physiology; Biopolymorphism; Counters; Size; Size distribution; Feeding; Nutrition. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/acte-1670.pdf |
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| Meleder, Vona; Barille-boyer, Anne-laure; Baud, Jean-pierre; Barille, Laurent; Cognie, Bruno; Rosa, Philippe. |
| The traditional fattening of the oyster Crassostrea gigas in oyster ponds of the French Atlantic Coast is submitted to natural environmental fluctuations. In order to reduce the growth variability of the soft parts of the bivalve, an intensive fattening process was developed, where the conditions of temperature, particulate organic and inorganic matter (POM and PIM) are controlled. This process relies on the production of the diatom Skeletonema costatum, which is then distributed to the oysters at an average concentration of 4–5 mg POM·L–1. An ecophysiological model of the oyster C. gigas, which simulates the evolution of somatic and gonad–reserve compartments, was applied to these conditions in order to analyse the bivalve responses. Experimentation was... |
| Tipo: Text |
Palavras-chave: Modélisation; Affinage; Ecophysiologie; Crassostrea gigas; Skeletonema costatum; Modelling; Oyster fattening; Ecophysiology; Crassostrea gigas; Skeletonema costatum. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00021/13248/10285.pdf |
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| Collos, Yves; Bec, Beatrice; Jauzein, Cecile; Abadie, Eric; Laugier, Thierry; Lautier, Jacques; Pastoureaud, Annie; Souchu, Philippe; Vaquer, Andre. |
| Time series data have been examined in Thau lagoon (Southern France) from 1972 to 2006 for water temperature, salinity, nutrients and from 1987 to 2006 for phytoplankton. A first main trend identified is an increase in mean annual water temperature (1.5 degrees C over 33 years or 0.045 degrees C/year) that was not evenly distributed among seasons. The highest rate of increase was in the spring (+ 3.0 degrees C over 33 years), followed by summer (+ 2.0 degrees C and fall (+ 1.7 degrees C. In winter, no significant increase over the 33 year period could be found. A second clear trend is a large decrease in soluble reactive phosphorus (SRP) concentration over the same 33 year period (summer values decreased from 10 mu M to 1 mu M. while winter values... |
| Tipo: Text |
Palavras-chave: Skeletonema costatum; Alexandrium catenella; Picocyanobacteria; Oligotrophication; Long term variability; Thau lagoon. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6420.pdf |
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| Breton, Gildas; Baud, Jean-pierre; Haure, Joel. |
| Après les études de mise au point de la technique intensive réalisées en 1988 et 1989 sur des bassins expérimentaux de 30 m2, une optimisation de cette méthode d'élevage a été faite sur deux claires de 200 m2 avec les normes zootechniques suivantes: densité = 300 palourdes x m-2, concentration d'eau de mer enrichie en Skeletonema costatum produit à partir d'eau salée souterraine = 300 cellules/µl ou 126 µg/l de chla, taux de renouvellement = 100 % du volume par jour. En 8 mois d'élevage, le poids moyen des palourdes est passé de 5,5 g à 19,3 g, soit un rendement de 4,53 kg/m2 pour une production finale de 1,86 tonne, avec une chair de qualité satisfaisante, riche en glycogène et ayant un indice de condition de 94. Aucune trace d'anneau brun n'a été... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum; Skeletonema costatum; Eau salée souterraine; Asperseur. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00048/15880/13302.pdf |
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| Haure, Joel; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Martin, Jean-louis. |
| A study was realized to automate the distribution of phytoplankton (Skeletonema costatum) in the extensive breedings of shells of commercial interest. Physical parameters were selected to define their domain of application for the realization of such a project The work was realized in spring (in June, 1999) and in autumn (in November, 1999) in different dilution of phytoplankton in a treated subterranean salt water. The results showed that the fluorescence gave a better sensibility to inter seasonal in the explanation of the distributed food, but lost as representation during the night-phases, On the other hand, the absorption ( optical density) presented less daily variability and with good correlations with the nourishing concentration of the environment... |
| Tipo: Text |
Palavras-chave: Fluorescence in vivo; Absorption in vivo; Automatisation; Skeletonema costatum; Fluorescence in vovo; Absorption in vivo; Automation; Skeletonema costatum. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00047/15870/13289.pdf |
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| Van Houcke, Jasper; Medina, Isabel; Maehre, Hanne K.; Cornet, Josiane; Cardinal, Mireille; Linssen, Jozef; Luten, Joop. |
| Oyster refinement, a common practice in France, is aimed at increasing the weight of oyster tissue and influencing the taste properties of the refined oysters. Refinement usually takes place in land-based systems where the oysters are fed with relatively high concentrations of microalgae. In this study the impact of feeding Skeletonema costatum and Rhodomonas baltica on the biochemical composition and sensory characteristics of Pacific cupped oysters (Crassostrea gigas) from the Eastern Scheldt during land-based refinement was studied. After a feeding period of four and seven weeks market-sized oysters were sampled for the analysis of fatty acids, free amino acids and volatile organic compounds and for a sensory evaluation by consumers and an expert panel.... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Skeletonema costatum; Rhodomonas baltica; Sensory properties; Free amino acids; Fatty acids. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00389/50011/50600.pdf |
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| Registros recuperados: 20 | |
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