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Registros recuperados: 13
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Bilan des essais d'élevage de pectinides en Méditerranée 1987-1991 ArchiMer
Coatanea, Denis; Paquotte, Philippe; Buestel, Dominique; Defossez, Jérôme; Moriceau, Jacques.
L'objectif de ce programme était de mettre au point une technique d'élevage pour les Pectinidés en Méditerranée afin de diversifier la conchyliculture en mer ouverte limitée jusqu'à présent à la mytiliculture. C'est pourquoi des essais ont été conduits pour évaluer les possibilités de croissance des trois espéces Pecten maximus, Pecten jacobaeus et Patinopecten yessoensis à partir de naissain d'écloserie. Ce programme a permis de réaliser une structure d'élevage pour fonds non protégés qui résiste aux tempêtes mais qui reste difficile à manipuler dans de mauvaises conditions de mer. Les résultats biologiques sont très médiocres, que ce soit en croissance ou en survie, et la taille réglementaire de mise en marché n'a pas pu être atteinte au bout de quatre...
Tipo: Text
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00079/19061/16656.pdf
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Calcein staining of calcified structures in pearl oyster Pinctada margaritifera and the effect of food resource level on shell growth ArchiMer
Linard, Clementine; Gueguen, Yannick; Moriceau, Jacques; Soyez, Claude; Hui, Belinda; Raoux, Aurore; Cuif, Jean Pierre; Cochard, Jean-claude; Le Pennec, Marcel; Le Moullac, Gilles.
Marine mollusc shell growth has been widely measured using fluorochrome marking. In order to test the efficiency and reliability of calcein staining on P. margaritifera shells and pearls, the present study examined two administration methods, different concentrations and several immersion times.Immersion in a 150 mg.L-1 calcein solution for 12 h to 24 h appeared to be the best method for marking P. margaritifera shells. For pearl marking, injection of a 200 mg.L-1 calcein solution into the pearl pouch was the optimal method. Calcein marking was then used to measure the influence of food resource levels on the shell growth. Groups of 23-month-old P. margaritifera were fed at three trophic levels for two months. The two highest food levels tested (6 000...
Tipo: Text Palavras-chave: Bivalvia; Pearl; Shell; Growth; Scanning electron microscope.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00028/13907/11195.pdf
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Croissance et indice de condition de l'huître plate Ostrea edulis élevée en mer et en étang sur la côte méditerranéenne ArchiMer
Paquotte, Philippe; Moriceau, Jacques.
A monitoring of the growth and condition index of the flat oyster Ostrea edulis has been conducted in the Thau Lagoon and in open sea off the Cap d'Agde. Between April and November, its growth is greater in open sea than in the lagoon. In winter, the growth doesn't stop in open sea, but one needs to get away from mussel collection in practicing seabed farming. In these conditions, the oyster's growth, throughout the year, is very close in open sea and in lagoons whereas the condition index is higher in open sea.
Tipo: Text Palavras-chave: Méditerranée; Mer ouverte; Etang de Thau; Indice de condition; Croissance; Ostrea edulis.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-6188.PDF
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Feeding the pearl oyster Pinctada margaritifera during reproductive conditioning ArchiMer
Le Moullac, Gilles; Soyez, Claude; Sham-koua, Manaarii; Levy, Peva; Moriceau, Jacques; Vonau, Vincent; Maihota, Mayalen; Cochard, Jean-claude.
This study aimed to model the food intake of P. margaritifera in order to examine the relationship between food level and reproductive activity. The effect of microalgae concentration on ingestion rate and assimilation efficiency was studied over a broad concentration range, using a mixture of Isochrysis galbana and Chaetoceros gracilis. Reproductive effort was assessed using three microalgae concentrations of 0.5, 7 and 18 cell μL-1. Reproductive status was assessed by gonad development index (GDI) – the ratio of the gonad surface to the visceral mass surface – and histological analysis of the gonad based on the presence (continuous or discontinuous) or the absence of gonial cells (GC). Ingestion is a saturating function of seston concentration for...
Tipo: Text Palavras-chave: Pinctada margaritifera; Food level; Ingestion rate; Reproduction; Gametogenesis.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00050/16085/13562.pdf
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Gamete cryopreservation, an asset for a durable pearl farming in French Polynesia ArchiMer
Hui, Belinda; Demoy-schneider, Marina; Vonau, Vincent; Le Moullac, Gilles; Moriceau, Jacques; Le Pennec, Marcel; Cochard, Jean-claude.
Cryopreservation is a useful tool for genetic improvement which has been applied to several bivalve mollusk species. It would allow to keep the gametes of selected individuals and to preserve ex-situ the biodiversity of wild populations of the black-lip pearl oyster Pinctada margaritifera threatened of standardization by the seed transfers between the islands in French Polynesia. The ability to cryopreserve spermatozoa would bring about significant benefits to the cultured black pearl industry. Sperm freezing supposes the control of different steps: preparation of breeders, sperm collection, evaluation of sperm quality and the freezing process itself. Broodstock conditioning in hatchery allows to obtain gametes from the pearl oyster. Sperm quality is...
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Ano: 2009 URL: http://archimer.ifremer.fr/doc/00029/14043/11238.pdf
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Hatchery-scale trials using cryopreserved spermatozoa of black-lip pearl oyster, Pinctada margaritifera ArchiMer
Hui, Belinda; Vonau, Vincent; Moriceau, Jacques; Tetumu, Roger; Vanaa, Vincent; Demoy-schneider, Marina; Suquet, Marc; Le Moullac, Gilles.
Cryopreservation is a valuable tool for genetic improvement programs. Several bivalve mollusc species have already been the subject of such programs and the Tahitian black pearl oyster industry is now planning the development of selective breeding for desirable traits in Pinctada margaritifera. The ability to cryopreserve spermatozoa would, therefore, offer significant benefits to the cultured black pearl industry. Spermatozoa were cryopreserved with CPA 0.7 M trehalose in 0.8 M Me2SO and a two-step freezing process was used: straws were first maintained in nitrogen vapour for 10 minutes, then directly plunged into liquid nitrogen and stored for one week before use. The viability of thawed sperm was 23 % lower than that of fresh sperm. When using thawed...
Tipo: Text Palavras-chave: Cryopreservation; Spermatozoa; Fertility; Larval rearing; Pearl oyster; Pinctada margaritifera.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00040/15098/12446.pdf
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Influence of lupin and rapeseed meals on the integrity of digestive tract and organs in gilthead seabream (Sparus aurata L.) and goldfish (Carassius auratus L.) juveniles ArchiMer
Omnes, Marie-helene; Silva, Francisco; Moriceau, Jacques; Aguirre, P.; Kaushik, Sadasivam; Gatesoupe, F. J..
Two rearing trials were conducted to evaluate the effects of dietary lupin (LM) and rapeseed (RM) meals in gilthead seabream (Sparus aurata L.) and goldfish (Carassius auratus L.) juveniles. Each plant meal was incorporated at the rate of 200 g kg−1 in two distinct diets, which were compared with a fishmeal-based diet as control. After 1 month, the two plant diets did not influence the whole body growth, but the digestive systems were affected. The splenosomatic index was reduced with two plant meals in goldfish and with RM in seabream. The hepatosomatic index was only reduced in LM-fed seabream. Cellular characteristics were also affected. The largest liver cells were observed in RM-fed goldfish suggesting changes in metabolic function. The LM and RM...
Tipo: Text Palavras-chave: Digestive tract; Gilthead seabream; Goldfish; Histology; Lupin; Rapeseed.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00190/30107/28742.pdf
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Intake of high levels of vitamin A and polyunsaturated fatty acids during different developmental periods modifies the expression of morphogenesis genes in European sea bass (Dicentrarchus labrax) ArchiMer
Villeneuve, Laure; Gisbert, Enric; Moriceau, Jacques; Cahu, Chantal; Zambonino, Jose-luis.
The effect of the feeding period on larval development was investigated in European sea bass larvae by considering the expression level of some genes involved in morphogenesis. Larvae were fed a control diet except during three different periods (period A: from 8 to 13 d post-hatching (dph); period B: from 13 to 18 dph; period C: from 18 to 23 dph) with two compound diets containing high levels of vitamin A or PUFA. European sea bass morphogenesis was affected by these two dietary nutrients during the early stages of development. The genes involved in morphogenesis could be modulated between 8 and 13 dph, and our results indicated that retinoids and fatty acids influenced two different molecular pathways that in turn implicated two different gene cascades,...
Tipo: Text Palavras-chave: Retinoid pathway; Morphogenesis; Vitamin A; PUFA; Sea bass larvae.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1215.pdf
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La Conchyliculture en Baie des Veys ArchiMer
Kopp, Joel; Joly, Jean-pierre; Moriceau, Jacques; Legagneur, E.; Jacqueline, Franck.
Ces travaux de recherche ont mis en évidence l'existence de terrains propices au développement de la conchyliculture en Basse Normandie. C'est ainsi qu'en Baie des Veys, par exemple, la surface ostréicole concédée est passée de 12 ha en 1969 à 162 ha en 1989 ou que, les zones ostréicoles de Lestre, de Crasville et de Meuvaines ont été créées de toutes pièces. Toutes les conditions étaient donc remplies pour que l'on assiste à la création de très nombreuses petites entreprises de production et donc à un développement rapide de celle-ci.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00081/19246/16841.pdf
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L'ostréiculture sur la côte Est du Cotentin ArchiMer
Jeanneret, Hélène; Kopp, Joel; Joly, Jean-pierre; Moriceau, Jacques; Legagneur, Eric.
Une approche socio-économique a permis de classer en 5 catégories les exploitations conchylicoles de la côte est du Cotentin. Parallèlement, une stratégie d'échantillonnage a été mise au point dans cette zone. Dans chacune des 20 strates, la densité des poches et la composition du stock (naissain , 18 mois, ... ) ont été évaluées, ce qui a permis d'estimer à 12 900 tonnes le stock d'huîtres en élevage en 1989 et 1990.
Tipo: Text Palavras-chave: Ostréiculture; Stocks; Crassostrea gigas; Est Cotentin; Exploitations conchylicoles; Echantillonnage.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00092/20361/18022.pdf
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L'ostréiculture sur la côte Ouest du Cotentin ArchiMer
Goulletquer, Philippe; Joly, Jean-pierre; Kopp, Joel; Legagneur, Eric; Moriceau, Jacques; Ruelle, Francois.
L'ostréiculture sur la côte Ouest Cotentin a été étudiée à partir d'estimations des stocks en élevage et de suivis de populations entre 1990 et 1992. A partir de stratégies d'échantillonnages, les stocks en élevage ont été estimés à 33 556 et 35 542 t respectivement en 1990 et 1991. Sur une production normande annuelle totalisant 34 914 tonnes, 53% a été produit sur la côte Ouest Cotentin en 1990. Un modèle global d'aménagement est proposé définissant la relation entre les performances de croissance mesurées, les cheptels en élevage, le niveau d'émersion, et la distance par rapport aux principales sources d'éléments nutritifs terrigènes. Près de 80% de la variabilité du poids final est expliqué par ce modèle régressif destiné à faciliter les décisions...
Tipo: Text Palavras-chave: Crassostrea gigas; Stock; Croissance; Composition biochimique; Aménagement; Cotentin.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00092/20326/17972.pdf
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Performance of triploid Pacific oysters Crassostrea gigas (Thunberg) reared in high carrying capacity ecosystem : survival, growth and proximate biochemical composition ArchiMer
Goulletquer, Philippe; Joly, Jean-pierre; Gerard, Andre; Le Gagneur, Eric; Moriceau, Jacques; Peignon, Jean-marie; Heurtebise, Serge; Phelipot, Pascal.
Triploid oysters Crassllstrea gigas were: produced in 1990 by treating fertilized eggs with cytochalasin B (CS). Triploids, treated diploids, and controls were deployed early 1991 in a high carrying capacity ecosystem on the Eastern Coast of Normandy (France). A monthly monitoring in 1992 showed that triploids yielded significantly higher growth rate and biochemical composition. However, growth was more heterogeneous. No evidence was found for a length or weight bimodal frequency distribution within triploid groups after a 26 months rearing cycle. Triploids showed retardation of gametogenesis. Carbohydrates content in triploids remained almost constant (40%) from June to September. Their survival rates were significantly lower than controls. Moreover...
Tipo: Text Palavras-chave: Biochemical compostion; Survival; Carrying capacity; Triploid; Growth; Oysters; Crassostrea gigas; Composition biochimique; Survie; Capacité trophque; Triploïdes; Croissance; Huîtres; Crassostrea gigas.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/publication-3088.pdf
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Programme de recherche pour la mise au point d'une méthode d'élevage des coquilles Saint-Jacques en Méditerranée. Rapport d'avancement des travaux. Résultats obtenus en 1988 ArchiMer
Buestel, Dominique; Cochard, Jean-claude; Defossez, Jérôme; Moriceau, Jacques; Paquotte, Philippe.
Au cours de cette deuxième année du programme « Coquille Saint-Jacques en Méditerranée » , a été achevée la mise au point des conteneurs d'élevage utilisables en mer ouverte dans le Golfe du Lion. Chaque conteneur en acier galvanisé mesure 2,5 m x 2,5 m x 1,7 m et pèse à vide 500 kg. Il supporte 120 poches d'élevage de type poches ostréicoles. Ces conteneurs sont adaptés aux nouvelles barges myticoles. Pour l'espèce Atlantique Pecten maximus de bons résultats ont été obtenus lors du prégrossissement qui consiste à amener les juvéniles d'une taille de 1 à 2 mm à une taille de 30 à 40 mm en 8 à 10 mois. Durant la seconde année d'élevage, les résultats sont moins favorables. Du fait d'un arrêt de croissance durant l'été, un cycle de 36 mois au minimum sera...
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Ano: 1989 URL: http://archimer.ifremer.fr/doc/00108/21964/19559.pdf
Registros recuperados: 13
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