|
|
|
| Registros recuperados: 149 | |
|
| |
|
|
| Catois, Stéphane; Haure, Joel; Martin, J-l.; Nourry, Max; Palvadeau, Hubert; Baud, Jean-pierre. |
| Mortality among juvenile Crassostrea gigas has been occuring during the summer months since 1995 and is now considered to be a real problem for French oyster culture. The aim of this study was to standardise the stress that could be applied to Crassostrea gigas spat. In initial experiments in 1998, the weight of individual spat and the duration of a heat shock at 50°C in freshwater, adapted for oysters of between 500 and 2000 mg, were built into a model to obtain 50% mortality. However, the precision was low (50%) and will need to be improved in the future. Following this, hatchery-produced juveniles weighing 10 to 500 mg were subjected to heat shock at 45°C in heshwater ; the duration of the shock was calculated based on a model built in 1997. The results... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Stress; Choc thermique; Mortalité; Crassostrea gigas; Stress; Heat shock; Mortality. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00080/19095/16690.pdf |
| |
|
| |
|
|
| Haure, Joel. |
| Une étude spatio-temporelle a été menée de mars 1990 à mars 1991 sur deux stations ostréicoles (nord et sud), de la baie de Bourgneuf. Cette étude se divise en deux parties distinctes : - L'une, hydrobiologique a permis, par des prélèvements hebdomadaires à basse mer plus trois heures, de caractériser les masses d'eau qui baignent chaque point d'étude, - L'autre, a eu pour but d'observer, par un suivi mensuel, l'évolution de la croissance, de l'engraissement et de la mortalité d'un échantillon d'huîtres (Crassostrea gigas) élevé sur chacun des secteurs; L'examen des résultats obtenus amène aux constatations suivantes : - Le secteur nord présente un milieu hétérogène d'une richesse nutritive importante mais est accompagnée d'une charge sestonique minérale... |
| Tipo: Text |
Palavras-chave: Baie de Bourgneuf; Crassostrea gigas; Seston; Météorologie; Hydrobiologie; Croissance; Mortalité; Capacité trophique. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00449/56095/57630.pdf |
| |
|
|
| Cornette, Florence; Blin, J.l.; Pacary, S; Pien, S; Le Gagneur, Eric; Kopp, Joel; Richard, O. |
| At the end of its third year, the regional network for monitoring REMONOR, confirms the particularities of oyster from Normandy in matter of growth and quality. Results from 2 000 are globally very close of those from 1998. Mortality of adults reached 14% and juvenile 6% which represent a low death rate. For this year the most blow area is the Baie des Veys with 31% death rate at Géfosse. Observed growth this year had been weaker than the past two years despite the spring and automnal growth. At spring, the higher recorded growth rate on the West coast with 0.42% (regional average : 0.29%). This seasonal trend seems more and more obvious every year. Regarding the classification of the special oysters, despite the change of the standard, the Baie des Veys... |
| Tipo: Text |
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/rapport-2251.pdf |
| |
|
| |
|
|
| Le Bec, Claude; Mazurie, Joseph. |
| The year 1990 is the second of a regional monitoring program on production assessment of Crassostrea in Britlany. 9 sites have been tested with 3 stations per site and 3 oysters bags in each station, at 3 different densities : 170, 210 and 250 oysters per bag. 18 month old oysters stocked in bags in march were analyzed 43 weeks later, by variables concerning growth, survival, quality... The growth was lower at higher densities, more or less according to sites. As previously, differences between sites and stations are observed, with some confirmations (higher mortalities in Aber Benoît site) and also evolutions (growth and Polydora infestations improvement in Pen Bé site). |
| Tipo: Text |
Palavras-chave: Bretagne; Crassostrea gigas; Mortalité; Indice de condition; Polydora; ACP; Brittany; Crassostrea gigas; Mortality; Condition index; Polydora; Factorial analysis. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00102/21318/18938.pdf |
| |
|
|
| Fleury, Pierre-gildas; Claude, Serge; Langlade, Aime; Le Coguic, Yvette. |
| The network IFREMER/ REMORA watches every year, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be regarded as an accurate estimation of professional oyster ongrowings. With regard to REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. But some areas remained affected by significant mortalities such as Pen-Bé in South Brittany. The year 1998 was overall a very poor year for growth : the mean oyster weight in... |
| Tipo: Text |
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas oyster; Mortality; Growth; Commercial quality; Polydora. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00113/22387/20082.pdf |
| |
|
|
| Goulletquer, Philippe; Prou, Jean; Heral, Maurice. |
| Following the development of net protection techniques (1980), Japanese clam Ruditapes philippinarum farms develop in the ponds of Charente-Maritime. The county production for 1984 is about 100 tonnes, for a turnover of 4.5 Million Francs. To this day, farmers cultivating clams in ponds over a full cycle get better growth results during the first year. The size of 24 mm is obtained with a density of 200 individuals per square metre. However, due to the type of water input in ponds and to the limited primary production developing in the latter, it appears that biomasses in farms during the second year should not be greater than 0.5 to 1 kg per m² (30 to 50 clams per m²). Thus, the development of clam culture in marsh areas comes to a halt, as farmers are... |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Mortalité; Biomasse; Croissance pondérale; Croissance linéaire; Biométrie; Elevage; Ruditapes philippinarum; Palourdes. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/rapport-3840.PDF |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Aqualive. |
| From 1986 to 1988 assays have been achieved in Noirmoutier IFREMER station aiming at increasing yield of grow-out of P. japonicus under semi-intensive conditions in earth ponds. Rearing methods were similar to those used in tropical areas, for other peneid species, and in Japan for this species. Yields of 130 to 270g/sq.m. were obtained, with final average weight of 15g. Marginal costs have been lower than marginal production in assays achieved in 4000sq.m. ponds. Pumps and aerators were necessary to achieve this increase in yield. This method is not appropriate in every part of Atlantic salted marshes |
| Tipo: Text |
Palavras-chave: Crevette; Pénéides; Penaeus japonicus; Elevage semi-intensif; Croissance; Mortalité; Consommation. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/00452/56312/57906.pdf |
| |
|
|
| Soletchnik, Patrick; Robert, Stephane. |
| Ce document s’inscrit dans le cadre de la problématique des mortalités de moules bleues sur les côtes françaises depuis l’hiver 2014. Il a été conçu comme une contribution aux projets Morbleu (projet de recherche) et Mytilobs (observatoire national sur les traits de vie de la moule). D’un point de vu historique, depuis le début du 20ème siècle, le principale « ennemi » de la moule reste la météo et en particulier, les tempêtes. Une seule crise de mortalité, majeure, est survenue en 1960-61 dans le pertuis Breton. Elle résulte d’une interaction entre le parasite mytilicola intestinalis et des conditions drastiques d’élevage sur bouchots dans la baie de l’Aiguillon. L’évaluation des mortalités de moules est difficile du fait des pratiques d’élevage et des... |
| Tipo: Text |
Palavras-chave: Mytilus edulis; Moule; Mortalité; REMOULA; MYTILOBS; Elevage; Bouchot; Reproduction environnement. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00345/45634/45263.pdf |
| |
|
| |
|
|
| Berthe, Franck; Pichot, Yves; Chollet, Bruno; Thebault, Anne; Kuntz, Gregoire; Tige, Gilbert; Thebault, Anne; Fleury, Pierre-gildas; Hirata, Toshio; Le Coguic, Yvette; Renault, Tristan; Lipart, Cecile; Grizel, Henri; Joly, Jean-pierre; Mazurie, Joseph; Baud, Jean-pierre; Goulletquer, Philippe; Dreno, Jean-paul; Buestel, Dominique. |
| Le réseau de veille zoosanitaire des mollusques, REPAMO, a été créé en 1992 afin de protéger les espèces d'intérêt économique des maladies susceptibles de les affecter. En effet, de même que les autres productions animales, la conchyliculture est frappée par diverses maladies dont certaines se comportent comme des facteurs limitants de la qualité ou de la quantité des productions. L' histoire de l'ostréiculture française a connu de tristes expériences en la matière, notamment dans les années 70 pour l' huître creuse portugaise, Crassostrea angulata ou encore pour l'huître plate, Ostrea edulis. En fait, nous ne disposons que de très peu de possibilités de protéger les mollusques bivalves vis à vis des maladies infectieuses. D' une part, les traitements,... |
| Tipo: Text |
Palavras-chave: Réseau surveillance; Pathologie; Mollusques bivalves; Mortalité. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00098/20901/18521.pdf |
| |
|
|
| Pepin, Jean-francois; Benabdelmouna, Abdellah; Degremont, Lionel; Guesdon, Stephane; Le Moine, Olivier; Morga, Benjamin; Bierne, Nicolas; Travers, Marie-agnes; Robert, Stephane; Soletchnik, Patrick. |
| Depuis 2014, des épisodes de mortalité anormale affectent les cheptels mytilicoles tant adultes que juvéniles. Dès l’année 2015, une première année d’étude a été réalisée au travers de l’action MORBLEU (Mortalité des moules Bleues). Elle a été menée dans les Pertuis charentais et la baie de Bourgneuf. Dans ce même contexte, elle a été reconduite en 2016 afin de poursuivre l’analyse des données collectées en 2015, renouveler une campagne d’étude et d’observation in situ, formuler des hypothèses autour de facteurs favorisants ces épisodes de mortalité de moules, développer des essais permettant de tester ces hypothèses dans le futur et produire des lots de moules pour ces essais et pour caractériser le potentiel adaptatif des animaux face aux épisodes de... |
| Tipo: Text |
Palavras-chave: Moules; Mytilus edulis; Facteurs environnementaux; Mortalité; Equilibre microbien; Populations; Qualité cytogénétique; Anomalies hémocytaires; Expression de gènes; Physiologie. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00391/50288/50978.pdf |
| |
|
|
| Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Vercelli, Catherine. |
| The monitoring network IFREMER/REMORA in Thau lagoon is assessing, on a yearly basis, mortality, growth and quality criteria distributed among 6 stations. Samplings are carried out in March, June, September and December. 2003 is a year with a very important mortality in Mèze and Marseillan area due to an anoxy and an anormal mortality at Bouzigues Nord in december. The growth rate is always better than others French oysters areas. Afnor index is high (beetwen 13.7 and 16.5 in december), so the totality of the oysters are classifed in "Spéciales". Polydora sp. Index is important but the initial stock was first infected. The valve quality is good, with no gelatine, except on Bouzigues South. |
| Tipo: Text |
Palavras-chave: REMORA; France; Lagune de Thau; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; France; Thau lagoon; Cupped oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/00113/22384/20079.pdf |
| |
|
|
| Mazurie, Joseph; Stanisiere, Jean-yves; Bouget, Jean-francois; Langlade, Aime; Leclerc, Emilie; Quinsat, Kevin; Herve, Gilles; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Meidi-deviarni, Ika; Goubert, Evelyne; Cochet, Helene; Dreano, Alain. |
| This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2012), to investigate about the causes of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). The protocol including both a sonar and video visualization of the bottom, and a monthly survey of 15 experimental oyster structures, allowed to assess the risk due to predation. A clear spatial distribution of the predatory effect was evidenced, with starfish (Asterias rubens and Marthasterias glacialis) predominating in the North-East sector, and boring snails (Ocenebra erinacea and Pterophora inornata) in the South-Center area.. The main mortalities from these predators... |
| Tipo: Text |
Palavras-chave: Baie de Quiberon; Huître; Crassostrea gigas; Risque; Mortalité; Prédation; Étoiles de mer; Bigorneaux perceurs; Risco; Bay of Quiberon; Oyster; Crassostrea gigas; Risk; Mortality; Predation; Starfish; Oyster drills; Risco. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00180/29130/27534.pdf |
| |
| Registros recuperados: 149 | |
|
|
|
