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Registros recuperados: 32
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Biologie et écotoxicologie des véligères de Crassostrea Gigas (Thunberg) dans le bassin d'Arcachon ArchiMer
His, Edouard.
This study analyses the larval recruitment and biology in Crassostrea Gigas, in the Arcachon Bay. Three types of observations were conducted: - a study of the reproduction anomalies in C. gigas between 1976 and 1981. - observations of the particulate nutrition of the veligeres. - ecotoxicologic experiments (organostannic action on oyster reproduction, mostly). The reproduction anomalies in C. gigas could not be attributed to either the genitors' quality or the water quality in the Arcachon Bay, but to a perturbation of the veligeres' trophic regime; the hypothesis of an alteration of the nanoplancton in the Bay, during the summer period, and linked to the action of the organotins is highly considered. The assumption of responsibility of the particulate...
Tipo: Text Palavras-chave: Organostanniques; Ecotoxicologie; Nutrition; Anomalies de la reproduction; Bassin d'Arcachon; Crassostrea gigas; Véligères; Recrutement.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/these-3347.pdf
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Caractéristiques des mortalités estivales de l'huître Crassostrea gigas dans le bassin d'Arcachon ArchiMer
Maurer, Daniele; Comps, Michel; His, Edouard.
Summer mortalities in the Pacific oyster in the Bay of Arcachon were analysed during four years (1981 to 1984). Mortalities occur mostly among one year old oyster and affect the whole bay, with different prevalence. The phenomenon occurs at certain times during the summer spawning period and is associated with high temperatures. A thinning of the digestive tubule epithelium is observed, but there is no evidence of infectious disease. The failure to find a causative agent, pollution or pathogen, tends to strengthen a physiological disorder hypothesis, related to environmental conditions. The influence of external (temperature, available food) and internai factors (length, maturation, spawning) on this phenomenon is discussed. A comparaison is drawn with...
Tipo: Text Palavras-chave: Bay of Arcachon; Summer mortalities; Crassostrea gigas; Bassin d'Arcachon; Mortalités estivales; Crassostrea gigas.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/publication-4318.pdf
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Conséquence sur la santé de la consommation des coquillages de pêche à pied dans le bassin d'Arcachon en période estivale ArchiMer
Achard-stablo, Catherine.
La consommation de coquillages, bien que représentant une faible part de la ration alimentaire, pose tm réel problème de santé publique. Ces mollusques, filtrant une grande quantité d'eau, concentrent les micro-organismes du milieu pouvant entraîner un risque pour le consommateur. Le risque sanitaire encouru à la suite d'ingestion de coquillages est essentiellement bactérien ou viral. Cela nécessite une surveillance des gisements naturels, au même titre que des sites d'élevage. La qualité de l'évaluation du ii.sque pose le délicat choix des indicateurs de contamination (virus, bactéries pathogènes et formes viables non cultivables). Dans ce travail, nous avons essayé de mettre en relation les troubles digestifs observés dans la population, en période...
Tipo: Text Palavras-chave: Santé publique; Coquillages; Bactériologie; Bassin d'Arcachon.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00442/55375/56893.pdf
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Contamination du milieu marin par les micropolluants (résultats du RNO de 1979 à 1994). 2 : Le Bassin d'Arcachon ArchiMer
Cantin, Christian.
After a quick presentation of the observation national network of the marine environment quality (RNO), the different metallic and organic Micropollutants measured in four stations of the Bay of Arcachon are described (origin, eventual toxicity). The results of the contamination measurements in the living tissue (oysters) are presented on graphics, based on a sample every three months from 1979 ta 1994, and means are compared to those obtained during the same period on the others points of the Manche-Atlantique coast.  
Tipo: Text Palavras-chave: Micropolluants; Bassin d'Arcachon; Huîtres; Micropollutants; Bay of Arcachon; Oysters.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00422/53309/54147.pdf
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Contamination par le tributylétain (TBT) du Bassin d'Arcachon évaluée à l'aide d'un indicateur biologique : l'imposex chez Ocenebra erinacea. Résultats préliminaires ArchiMer
Fernandez-castro, Nora; His, Edouard; Cantin, Christian.
The Bay of Arcachon has been particularly affected by the impact of organotin-based antifouling paints (His, 1996). Boring gastropods, Ocenebra erinacea, have completely disappeared from the Bay, because of the castration induced by these compounds, from 1980 to 1990. There have been no studies on imposex effects in the Bay of Arcachon since the investigations of Poli (1972) who first described the phenomenon, and of Féral (1982) who attributed it to TBT. Recently, Sarradin & al. (1991) demonstrated the persistence of TBT and its degradation products in the sediments of the Bay, the latter being a potential source of pollution; Stroben & al. ( 1995) have conceived a contamination scale based on the VDSI (Vas Deferens Sequence Index) in prosobranch...
Tipo: Text Palavras-chave: Bassin d'Arcachon; Imposex; Ocenebra erinacea; TBT; Bay of Arcachon; Imposex; Ocenebra erinacea; TBT.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00038/14898/12224.pdf
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Copper levels evolution in Arcachon bay oysters : role of the regulation on antifouling paints ArchiMer
Alzieu, Claude; Barbier, Georges; Sanjuan, Jane.
The ban of tributyltin compounds in antifouling paints induced a strong decrease in the level of tin in Arcachon bay. At the same time, copper inputs have increased tenfold since 1982 owing to the widespread use of paints containing cuprous oxide. In spite of this large input, the statistical analysis of monitoring data (1979-1985) show a relative stability in the copper levels in Arcachon bay oysters.
Tipo: Text Palavras-chave: Cuivre; Huîtres; Bassin d'Arcachon; Peintures antisalissures; Copper; Oysters; Arcachon Bay; Antifouling paints.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00022/13291/10337.pdf
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Croissance, engraissement et cycle sexuel de Crassostrea gigas dans le Bassin d'Arachon: comparaison des huîtres agées de 1 et 2 ans ArchiMer
Maurer, Daniele; Borel, Michel.
Two-year-old oysters have a physiology which is reproduction-oriented, their maturation occurring synchronously among oysters from the same batch. The importance of the spring accumulation of glycogenated stocks varies through the years and correlates with the growth stage. Glucidic components are quickly used during the month preceding egg-laying and are transformed into lipid stocks for the oocytes. One-year-old oysters develop at different rates, some of them not showing any sign of maturation and the percentage of laying individuals varies through the years. Glycogenated stocks accumulate in a similar way in both age-classes and their more precocious and more intense use by young molluscs is not necessarily linked with their gametogenesis and growth,...
Tipo: Text Palavras-chave: Bay of Arcachon; Maturation; Biochemistry; Crassostrea gigas; Bassin d'Arcachon; Maturation; Biochimie; Crassostrea gigas.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6182.PDF
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Croissance et mortalite du petoncle noir Chlamys varia dans le bassin d'Arcachon, France ArchiMer
Trut, Gilles; Robert, Rene; Laborde, Jean-louis.
Until 1960, the Black scallop Chlamys varia was relatively abundant along the French Atlantic coasts. Today most of these natural beds have disappeared. Because mollusc hatchery and nursery techniques have been mastered, the reintroduction of this species, under control, was carried out in several areas and particularly in the bay of Arcachon, from 1989 to 1992. Good results were obtained in hatchery and nursery but the development of the juveniles in the natural fields was poor. The growth of Chlamys varia was satisfactory but heavy mortalities were rapidly recorded which could not be related to the hydrobiological conditions. This species seems to be very sensitive to short emersion and removal operations which are incompatible with aquaculture processes.
Tipo: Text Palavras-chave: Bassin d'Arcachon; Mortalité; Croissance; Chlamys varia; Mollusque; Bay of Arcachon; Mortality; Growth; Chlamys varia; Mollusc.
Ano: 1994 URL: https://archimer.ifremer.fr/doc/1994/rapport-1567.pdf
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Croissance, production et demande d'énergie d'une population de soles (Solea vulgaris) introduite dans une lagune aménagée (bassin d'Arcachon) ArchiMer
Lasserre, G.; Lasserre, P..
Population of 4000 soles received from an induced spawing (COB-BREST), with a mean weight o£ 54 mg were introduced into a man modified lagoon (1000 m2 ) at Certes (4 soles/m2 ). The experiment was continued until December 1977 and permitted an analysis of the demographic evolution of the population : structure number, biomass, growth, production. Simultaneously an estimate of the trophic support necessary for the population derived by correlating oxydative demands with rate of oxygen consumption, was determined experimentally with specimens obtained during the samplings for growth and production (19 VII, 14 IX, 24 XI, 20 XII 1977). 1°) The demographic evolution of the population shows a rapid growth and a strong spread in size. For the short duration of...
Tipo: Text Palavras-chave: Lagunes côtières exploitées; Bassin d'Arcachon; Sole Solea vulgaris; Aquaculture intensive; Production; Budget énergétique; Energie potentielle trophique.; Exploited coastal lagoons; Arcachon Basin; Sole; Solea vulgaris; Intensive aquaculture; Production; Energy budget; Trophic energy potential..
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41687/40896.pdf
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Élevage de la palourde japonaise Ruditapes philippinarum dans le bassin d'Arcachon. Bilan des dix dernières années et perspectives de développement ArchiMer
Robert, Rene; Deltreil, Jean-pierre.
Farming of the Japanese clam Ruditapes philippinarum took place for the first time in 1980 in the Arcachon basin. After an experimentation period of about ten years, a farming strategy, taking into consideration the distinctive features found in the bay, was able to emerge. For example, in order to fight against clam predators, crabs such as Carcinus maenas, and balistes such as Balistes capriscus, vertical protection coupled with prior ground gravelling, and laying of nets over the beds during the summer months, have become necessary. The best raising technique seems to rest on early spring planting of middle size spats (T5), after checking that no brown rings are visible. If clam growth seems to be better in oceanic zones, it looks similar in other areas...
Tipo: Text Palavras-chave: Basin of Arcachon; Culture methods; Growth; Predation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum; Bassin d'Arcachon; Stratégie d'élevage; Croissance; Prédation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-1652.pdf
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Essai de culture de l'huître plate Ostrea edulis dans le bassin d'Arcachon. Résultats préliminaires ArchiMer
Robert, Rene; Pichot, Yves; Comps, Michel.
From 1988 to 1989, a study has been conducted pertaining to the growth of the flat oyster Ostrea edulis, as well as Marteilia refringens and Bonamia ostreae outbreaks. Commercial mono specific farming (flat oysters), with low density or mixed (flat and hollow oysters) along with higher density, has been taking place in the Arcachon basin oceanographic sectors, where main hydrobiological parameters were acquired simultaneously. The excellent growth of the flat oyster was witnessed in mono specific farming. However this growth was average in mixed farming, probably due to higher total oyster density and interspecies competition. Regardless of the type of farming, Marteilia refringens infection was very quick and may have been related to climatic bay water...
Tipo: Text Palavras-chave: Basin of Arcachon; Pathology; Bonamia ostreae; Marteilia refringens; Growth; Ostrea edulis; Bassin d'Arcachon; Pathologie; Bonamia ostreae; Marteilia refringens; Croissance; Ostrea edulis.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-1592.pdf
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Estimation de la biomasse d'huîtres Crassostrea gigas en élevage dans le bassin d'Arcachon. Été 1985. ArchiMer
Maurer, Daniele; Borel, Michel; Dreno, Jean-paul.
L'élaboration d'un modèle de gestion d'un bassin conchylicole nécessite, en particulier, la connaissance de l’évolution des stocks d'huîtres d'une année à l'autre afin d'en apprécier l'influence éventuelle sur le rendement. Le présent travail décrit la méthodologie utilisée et les résultats obtenus au cours de la première estimation du stock d'huîtres Crassostrea gigas en élevage dans le bassin d'Arcachon en 1985. Cette estimation nécessite l'utilisation simultanée de photographies aériennes (évaluation de la surface réellement exploitée ) et de sondages-terrain (évaluation de la biomasse par unité de surface). Ces derniers ont également permis de valider les résultats obtenus par photographie. En 1985, le taux d'exploitation variait, selon la zone...
Tipo: Text Palavras-chave: Crassostrea gigas; Biomasse; Bassin d'Arcachon; Crassostrea gigas; Biomass; Bay of Arcachon.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00102/21342/18965.pdf
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Estimation de la biomasse d'huîtres Crassostrea gigas en élevage dans le bassin d'Arcachon. Etés 1986 et 1987 ArchiMer
Maurer, Daniele; Parache, Alain; Dreno, Jean-paul.
Afin d ' améliorer la précision des résultats et depuis 1986, quelques modifications ont été apportées à la stratégie d'échantillonnage qui avait été adoptée en 1985 : - prise en compte de la structure en âge de l a population, en différenciant les huîtres âgées de 1 an de celles d'âge supérieur, - traitement séparé des poches et des collecteurs pour l'élevage en sur élevé . Au cours des trois années , le stock d'huîtres en élevage est resté relativement stable : 1985 37 996 t ± 1 970 t précision 5,1% 1986 37 835 t ± 4 196 t précision 11,1% 1987 39 079 t i 3 350 t précision 8,6% avec environ 80% représenté par la culture à plat. Cependant, il est apparu que les différentes variables estimées et leur précision variaient d'une année à l 'autre en liaison...
Tipo: Text Palavras-chave: Crassostrea gigas; Biomasse; Bassin d'Arcachon.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/00430/54141/55471.pdf
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Etude de la prolifération des algues vertes dans le bassin d'Arcachon ArchiMer
Manaud, Francois; Maurer, Daniele; Trut, Gilles; Auby, Isabelle.
Introduction Massive proliferations of algae and, in particular green macroalgae, have been known all over the continents for several decades. They affect various littoral sites and belong to diverse species (Ulva, Enteromorpha and especially Cladophora). In 1990, on the North Brittany shore, more than 80 000 m3 ulvas have been mechanically removed by affected communities. Up until recently, the Arcachon basin escaped from such phenomenon, even if the diversity and quantity of algae found there had already undergone increasing periods in the past. However, the first algae proliferations only started in the 80's, which scale was large enough to be a nuisance to all activities taking place in the basin. At first (starting in1982), those proliferations were...
Tipo: Text Palavras-chave: Basin of Arcachon; Green seaweed; Proliferation; Bassin d'Arcachon; Algue verte; Proliferation.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/rapport-1653.pdf
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Evaluation du stock de palourdes du bassin d'Arcachon ArchiMer
Bertignac, Michel; Auby, Isabelle; Sauriau, Pierre-guy; De Montaudouin, Xavier; Foucard, Julie; Martin, Sophie.
As part of a larger project financed by the European Union programme "Community initiative PESCA" on the study of "small scale fisheries" in Aquitaine (France), an estimation of the stock of clams in the Bassin d'Arcachon has been conducted. A two-stage stratified random sampling survey has been designed. Samples have been collected using a Hamon bottom sampler in 237 locations distributed over 24 km2. The clam Tapes philippinarum, which appeared in the basin following a series of aquaculture experiments in the mid eighties, is now the main species accounting for more than 90% of the abundance and the biomass, largely overcoming the European species Tapes decussata. The mean abundance and biomass (26 clams / m2 et l28g / m2) are above those estimated in...
Tipo: Text Palavras-chave: Palourde; Tapes philippinarum; Tapes decussata; Evaluation stock; Pêche; Pêche à pied; Echantillonnage; Bassin d'Arcachon; Clam; Tapes philippinarum; Tapes decussata; Stock assessment; Fishery; Sampling; Bassin d'Arcachon.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00105/21658/19240.pdf
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Evolution d'un gisement de Cardium edule lmk dans le Bassin d'Arcachon. ArchiMer
Deltreil, Jean-pierre; His, Edouard.
This paper traces the development of a new bed of cockles (C. edule) in the Bassin d'Arcachon, France. Details of the basin, numbers of cockles at various times of the year, growth, fishery and competition with mytilus edulis are considered under general headings and results are presented graphically: Main Shore Beds, March 1968 to March 1969; Development of the beds over that year; The Lagoon Bed, April 1969 to April 1970. Discussion relates to possible survival and exploitation of the beds.
Tipo: Text Palavras-chave: Exploitation; Cardium edule; Bassin d'Arcachon; Cardium.
Ano: 1972 URL: http://archimer.ifremer.fr/doc/1972/publication-2054.pdf
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Evolution saisonnière des populations de diatomées benthiques dans les lagunes aménagées de Certes ArchiMer
Malissen, M.o.; Lasserre, P..
In lagoons and estuarine ecosystems, the benthic microflora contributes considerably to the primary production of the area and consists largely of diatoms Monthly samplings have been made from December 1976 to March 1978 in a shallow station characterized by the lack of macrophytes. Two sets of monthly sam­plings were made allowing in theone hand a qualitative analysis and on the other hand a quantitative study by cellular counts. The diatom populations show a cyclic evolution with two peaks : one in February 1977 and the other in September 1977. This cycle is confirmed by the di­versity and dominance analysis. Seasonal evolution is characterized by the domi­nance of one or more species with well marked succession of dominant species (Nitzschia Navicula et...
Tipo: Text Palavras-chave: Diatomées benthiques; Variations saisonnières; Diversité; Lagunes; Bassin d'Arcachon; Benthic diatoms; Seasonal variations; Diversity; Lagoons; Arcachon Bay.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41679/40888.pdf
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Evolutions bathymétrique et morphologique du bassin d'Arcachon ArchiMer
L'Yavanc, Jacky.
La seule couverture bathymétrique complète donnant des renseignements sur l'altimétrie des estrans et sur la profondeur des chenaux date de 1864. Pour la mise en place d'un modèle hydrodynamique, une bathymétrie classique a été réalisée sur toute l'étendue du bassin d'Arcachon entre 1992 et 1993. Le premier chapitre traite : - des observations de la marée en différents points répartis autour et à l'intérieur du Bassin. Ces observations permettent notamment de mettre en évidence une déformation du plan d'eau à toutes heures de la marée. - des méthodes d'exécution et de traitement du levé bathymétrique. Le deuxième chapitre concerne l'évolution morphologique du Bassin sur une période de 130 ans. D'importantes modifications sont mises en évidence : - un...
Tipo: Text Palavras-chave: Bassin d'Arcachon; Bathymétrie; Morphologie; Comparaison bathymétrique.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00080/19127/16722.pdf
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Growth, fatness and gross biochemical composition of the japanese oyster Crassostrea gigas in stanway cylinders in the bay of Arcachon, France ArchiMer
Robert, Rene; Trut, Gilles; Borel, Michel; Maurer, Daniele.
The Stanway cylinder was tested in the bay of Arcachon from September 1989 to August 1991. Trials were mainly performed on the Japanese oyster Crassostrea gigas in a wind-exposed area. The seed, spat, 18 month old oysters development and fattening of 2 year old oysters were studied. Compared to plastic bags the Stanway cylinder has high positive effects on survival and growth of Crassostrea gigas seed. It also has positive effects on commercial sized Crassostrea gigas fattening. Nevertheless, the cylinder has negative effects on the growth of Crassostrea gigas spat and 18 month old oysters, except for width. However, oyster quality is greatly improve : higher condition index, higher carbohydrate contents and higher shell densities were recorded. Because...
Tipo: Text Palavras-chave: Bay of Arcachon; Culture methods; Growth; Crassostrea gigas; Bassin d'Arcachon; Technique d'élevage; Croissance; Crassostrea gigas.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/rapport-1644.pdf
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Impact des facteurs anthropiques sur le recrutement de l'huître : l'exemple du bassin d'Arcachon ArchiMer
His, Edouard; Robert, Rene.
"Il est impossible d'imaginer un lieu plus favorable à l'ostréiculture que le bassin d'Arcachon" (Yonge, 1950). En effet, l'huître indigène, Ostrea edulis, et l'espèce plus récemment introduite, Crassostrea gigas, peuvent s'y reproduire en abondant. Si l'exploitation de la première a pris fin à la suite de deux épizooties consécutives, la seconde est l'objet d'une culture intensive dont la production annuelle est d'environ 12 000 tonnes de mollusques commercialisés. Des anomalies ont sévi dans la baie, de 1977 à 1981, rendant les récoltes de naissain pratiquement sensibles aux facteurs d'agression, et ont même été proposées par Woelke (1967) comme matériel biologique, afin de tester la qualité des eaux en zone littorale. La technique des élevages larvaires...
Tipo: Text Palavras-chave: Bassin d'Arcachon; Crassostrea gigas; Larves; Température; Nutrition; Bioessais; Facteurs anthropiques.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00019/13055/10013.pdf
Registros recuperados: 32
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