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Registros recuperados: 68
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Action de l'acétate de tributyle-étain sur les oeufs et larve D de deux mollusques d'intérêt commercial : Crassostrea gigas (Thunberg) et Mytilus galloprovincialis (Lmk) ArchiMer
Robert, Rene; His, Edouard.
L'acétate de tributyle-étain, qui entre dans la composition de certaines peintures antisalissures, est fortement toxique pour les oeufs et les larves D de Crassostrea gigas a la teneur de 5 p.p.b. (HIS et. ROBERT, 1980). Des concentrations inférieures, aussi basses que 1 microgramme par litre, ont été testées sur cette même espèce, mais aussi sur la moule, Mytilus galloprovincialis.
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Ano: 1981 URL: http://archimer.ifremer.fr/doc/00091/20268/17912.pdf
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Action de l'acétate de tributyle-étain sur les oeufs et les larves D de deux mollusques d'intérêt commercial : Crassostrea gigas (Thunberg) et Mytilus galloprovincialis (Lmk) ArchiMer
Robert, Rene; His, Edouard.
The Tributyl tin acetate, a component of certain antifouling paints, has deleterious effects on eggs and D shaped larvae from Crassostrea gigas at 5 p.p.b. (HIS & ROBERT, 1980). Here we have tested concentrations as low as 1 p.p.b. on eggs and on 24 hours old larvae both from Crassostrea gigas and Mytilus galloprovincialis. The same results are got ; this product kills embryos and larvae in a few days ; it prevents growth of 24 hours old larvae exposed to this toxic. Mussels larvae seem to be less sensitive.
Tipo: Text Palavras-chave: Antifouling; Larves; Pollution; Toxicité; Bivalvia; Crassostrea gigas; Mytilus galloprovincialis; Antifouling; Larvae; Pollution; Toxicity; Bivalvia; Crassostrea gigas; Mytilus galloprovincialis.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/00037/14862/12185.pdf
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Action d'un sel organo-métallique, l'acétate de tributyle-étain sur les oeufs et les larves D de Crassostrea gigas (Thunberg) ArchiMer
His, Edouard; Robert, Rene.
L'action de l'acétate de tributyle-étain, à des concentrations variant de 5 à 100 micro- grammes/l a été étudiée sur les oeufs de Crassostrea gigas en cours de fécondation. Parallèlement les mêmes concentrations ont été testées sur les larves D âgées de 24 heures.
Tipo: Text Palavras-chave: Huître; Crassostrea gigas; Expérimentation; Larves; Reproduction; Sel organo-métallique; Acétate de tributyle étain.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00009/11983/8687.pdf
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Activité comparée chez les espèces Crassostrea angulata Lmk et Crassostrea gigas Thunberg, en hiver ArchiMer
His, Edouard.
L'espèce Crassostrea gigas a été introduite en 1969 à titre d'essai par de nombreux ostréiculteurs du bassin d'Arcachon. La comparaison des vitesses de croissance de cette nouvelle espèce et de l'huître indigène C. angulata est nettement à l'avantage de l'huître japonaise. Cette dernière atteint la taille marchande dans la plupart des cas dès la première année d''immersion dans la baie alors qu'il faut généralement de deux à trois ans pour obtenir le même résultat avec l'huître portugaise.
Tipo: Text Palavras-chave: Ostréiculture; Huître; Crassostrea angulata; Crassostrea gigas; Physiologie; Comparaison; Bassin Arcachon; Gironde.
Ano: 1971 URL: http://archimer.ifremer.fr/doc/00009/11979/8683.pdf
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Bioaccumulation of metals in sediment elutriates and their effects on growth, condition index, and metallothionein contents in oyster larvae ArchiMer
Geffard, A; Geffard, O; Amiard, J; His, Edouard; Amiard Triquet, C.
The bioavailability of Cd, Cu, Zn, and Pb from two metal-contaminated sediments (Bidassoa and Dunkerque) was studied using Crassostrea gigas larvae exposed to sediment elutriates. The metal contents within the sediments, the larvae and larval growth, the condition index, and the induction of metallothionein in the larvae were measured. The larval growth and condition index were only affected after exposure to the highest elutriates concentration (5 to 25%) from the most contaminated sediment (Dunkerque). Bioaccumulation of all metals was observed in larvae exposed to Dunkerque elutriatre; only Cu bioaccumulation was observed in the Bidassoa elutriate. The results from larvae exposed to both sediment elutriates show a strong correlation between...
Tipo: Text Palavras-chave: Metallothionein; Metal bioaccumulation; Larval growth; Crassostrea gigas larvae; Sediment elutriates.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-4748.pdf
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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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Biologie et physiologie des coquillages ArchiMer
His, Edouard; Cantin, Christian.
Monsieur le Directeur de la DEL m'avait chargé en 1992 d'une opération de formation-recyclage interne à destination principalement des "techniciens de terrain" afin de faciliter leur dialogue avec les professionnels de la conchyliculture ("expéditeurs"). Cette formation a donné lieu a diverses sessions au cours des dernières années, en concertation avec Monsieur le Chef du Département Qualité des Ressources . A cette occasion, un polycopié a été distribué aux différents participants. La Direction de la DEL m'a suggéré de reprendre ces éléments sous la forme d'un Rapport Interne . Le thème retenu était "la physiologie des coquillages", l'accent devant être mis sur la nutrition, la respiration, l'excrétion et la reproduction d'une part, sur le rôle des...
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Ano: 1995 URL: http://archimer.ifremer.fr/doc/00095/20628/18255.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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Comparaison de deux méthodes de prélèvement pour le dénombrement des larves de Crassostrea gigas en zone conchylicole ArchiMer
His, Edouard; Borel, Michel; Robert, Rene; Laborde, Jean-louis.
La numération des larves d'huître dans le plancton renseigne les ostréiculteurs sur la date de pose des collecteurs. La technique utilisée est très ancienne (BOURY, 1928) ; pour chaque station trois prélèvements par traits de filets pendant 10 minutes sont effectués : deux en surface (filet 200 et filet 130) et un à 1 mètre de profondeur (filet 130). Une méthode par pompage avec mesure instantanée du volume d'eau filtrée a été mise au point (prélèvements en surface et à 1 mètre de profondeur, et rétention des véligères sur filets 200). La comparaison des deux techniques met en évidence l'inadaptation de l'ancienne méthode. Le choix de la porosité (70 µm pour les filets 200) est mal adapté à la récolte des larves D (stade 1) dont le nombre peut être sous...
Tipo: Text Palavras-chave: Numération; Technique; Reproduction; Crassostrea gigas; Larves; Naissain; Recrutement; Ostréiculture.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-6444.PDF
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Comparaison de la filtration entre une population de Crassostrea angulata Lmk et une population de Crassostrea gigas Thunberg élevées dans le bassin d'Arcachon ArchiMer
His, Edouard.
L'introduction d'une nouvelle espèce en ostréiculture donne souvent lieu à des débats passionnés dans les milieux ostréicoles. Un exemple est donné par Charles Martin, parqueur du Bassin d'Arcachon, dans son ouvrage "Agriculteur de la mer"; il rapporte les mesures restrictives qu'avait entraînées l'introduction de l'huître portugaise à Arcachon au début du 20ème siècle. Un des arguments avancés pour expliquer les réticences était celui de la "concurrence vitale" et de la compétition sur le plan nutritionnel (filtration) entre C. angulata et Ostrea edulis: cette dernière espèce était alors seule exploitée dans le bassin. Il fallut attendre l'épizootie de 1920, qui anéantit presque totalement l'huître plate, pour que la portugaise soit définitivement admise.
Tipo: Text Palavras-chave: Ostréiculture; Crassostrea gigas; Crassostrea angulata; Filtration; Bassin Arcachon; Gironde.
Ano: 1970 URL: http://archimer.ifremer.fr/doc/00009/11978/8682.pdf
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Comportement de Crassostrea Angulata lamarck sous des conditions d'asphyxie ArchiMer
His, Edouard.
The oyster's ability to survive in the absence of oxygen is well known. The only means of defence that these sedentary organisms have for fighting against unfavourable environmental conditions or predators is occlusion of the valves. This implies anaerobiosis potential. This way of life occurs frequently: in the oyster beds, following the most violent storms, the oysters are piled up or covered with sand; they survive in this situation for several days until the oyster farmers put them back to take advantage of the spring tides that enable the drying out of the breeding areas; during periods when the runoff basins are overloaded, the dissolved oxygen content of the sea water are very low and significant mortality rates are sometimes observed in the...
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Ano: 1970 URL: http://archimer.ifremer.fr/doc/1970/publication-3137.pdf
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Comportement de Crassostrea angulata Lmk. sous des conditions experimentales de milieu. Resistance aux basses salinites. ArchiMer
His, Edouard.
Portuguese oysters, C. angulata from brood ponds at Arcachon (salinity 27-28ppt) were exposed to lowered salinities and their valve activity continuously recorded. Down to 2 ppt, normal activity was resumed within 24 hours, between 8 and 11%, oysters, survived and adapted slowly, below 8%, oysters died. Sexually mature oysters are more susceptible and may die at 10 to 8% salinity, perhaps because the gonad is full of gametes. Oysters from different localities probably respond differently to changed salinity.
Tipo: Text Palavras-chave: Arcachon; Salinities; Crassostrea angulata; Portuguese oysters.
Ano: 1972 URL: http://archimer.ifremer.fr/doc/1972/publication-2053.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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Contribution à l'étude biologique de l'Huître dans le Bassin d'Arcachon, activité valvaire de Crassostrea angulata et de Crassostrea gigas; application à l'étude de la reproduction de l'Huître Japonaise ArchiMer
His, Edouard.
The biological study of the oyster is of a great interest for oyster culture and presents a wide field of investigation hardly addressed by scientists so far. This thought put forward by GALTSOFF in 1928, is still valid for the Portuguese oyster Crassostrea angulata (Lamarck); indeed, if many studies have been conducted on African species and, to certain extent on the Japanese oyster C.gigas (Thunberg) and the flat oyster Ostrea edulis (Linné), very few works deal with C. angulata from an experimental biological point of view. As highlighted by GHIRETTI (1960), molluscs show a greater physiological diversity than any other invertebrate philum; slight differences exist from one group to the other, and even sometimes between neighbouring species. We found...
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Ano: 1976 URL: http://archimer.ifremer.fr/doc/1976/these-3352.pdf
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Contribution à l'étude de la qualité des eaux de rejet agricoles dans les marais charentais ArchiMer
Masson, Daniel; His, Edouard.
The agricultural fresh water swamp of Moëze-Brouage, in Charente-Maritime, witnesses the replacement of cattle rearing in the grasslands by intensive farming affecting the quality of waste waters flowing into the ocean. The proximity of the oyster culture basin of Marennes-Oléron and of the ponds lead to the implementation of some ecotoxicological tests, which turned out to be largely positive on some of the swamp's outlets, with negative effects on the tested organisms.
Tipo: Text Palavras-chave: Charente Maritime Département; Marais Charentais; Ecotoxicologie; Eaux de rejet agricoles.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/rapport-6311.pdf
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Croissance des larves de Crassostrea gigas et de Mytilus galloprovincialis en présence d'algues monocellulaires isolées du tractus digestif des véligères du milieu naturel ArchiMer
His, Edouard; Robert, Rene.
The collection of Crassostrea gigas veligeres in their natural environment and the homogenate technique (HIS et al., 1985) enable the monospecific culture of nine algae which larvae feed on. Four of them could be mass-produced: Nannochloris atomus, Stichococcus bacillaris, Chlamidomonas bullosa and Tetraselmis Tetrathele. Their feeding quality has been tested using the cross-growth method, and using Crassostrea gigas and Mytilus galloprovincialis veligeres. Although regularly found in the homogenates, and thus fed on by larvae, the first three algae gave poor results. Only Tetraselmis tetrathele has good nutritional qualities for Crassostrea gigas veligeres.
Tipo: Text Palavras-chave: Tetraselmis tetrathele; Chlamydomonas bullosa; Stichococcus bacillaris; Nannochloris atomus; Algues unicellulaires; Mytilus galloprovincialis; Crassostrea gigas; Nutrition; Larves.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-6186.PDF
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Croissance et spectre de taille de trois algues en cultures non renouvelées, utilisées pour la nutrition de larves de bivalves en écloserie ArchiMer
Robert, Rene; His, Edouard.
The different growth stages of three marine unicellular algae used in aquaculture, Isochrysis galbana, Chaetoceros calcitrans forma pumilum and tetraselmis suecica have been studied for 50 days under controlled culture conditions using a particle meter. At the same time, the size spectrum of the cells has been determined using a C 1000 scanner. The exponential growth stage is 11 days in the first two species, and 13 in the last one. Chaetoceros calcitrans forma pumilum is the smallest with an average size of 3.5 µm. Its cellular volume is constant. The average size of Isochrysis galbana is 4.5 µm. An increase of the cellular volume is observed through its stationary stage. The modal size of Tetraselmis suecica is 8 µm. Again, an increase in the cellular...
Tipo: Text Palavras-chave: Spectre de taille; Croissance; Tetraselmis suecica; Chaetoceros calcitrans forma pumilum; Isochrysis galbana; Algues unicellulaires.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-6187.PDF
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Croissance et spectre de tailles de six algues utilisees pour la nutrition de larves de bivalves en ecloserie, en culture non renouvelee ArchiMer
Robert, Rene; His, Edouard.
The growth and the size-frequency distribution of six unicellular marine algae, Isochrysis aff. galbana "Tahiti" nom. prov., Pavlova lutheri (Droop) Green, Pseudoisochrysis paradoxa nom. prov., Tetraselmis tetrathele (G.S. West) Butcher, Chaetoceros calcitrans (Paulsen) Takano et Chaetoceros gracilis Schutt have been studied. Most of these species showed an increase in size during the stationary phase of growth. Because these data and anterior ones were achieved in similar experimental conditions, they were ranked by size and their growth performances discussed.
Tipo: Text Palavras-chave: Molluscan larvae; Hatcheries; Nutrition; Growth; Algal culture.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/publication-1778.pdf
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Déterminisme du recrutement : données préliminaires sur le développement et la survie larvaire de Crassostrea gigas ArchiMer
His, Edouard.
Hormis les facteurs anthropiques (voir références bibliographiques HIS et al .), l es facteurs nutritionnels jouent un rôle prépondérant dans le déroulement de la vie pélagique des larves de bivalves ; un déficit nutritionnel peut, à lui seul, hypothéquer les chances de captage (PERSOONE et al, 1980; HIS et ROBERT, 1985). Or les données dont nous disposons ont été presque exclusivement obtenues en milieu expérimental (voir synthèse de LUCAS, 1982); il n 'est pas certain qu'elles puissent être extrapolées au milieu naturel. Site exceptionnel en ce qui concerne la reproduction des huîtres, le bassin d'Arcachon permet l'isolement de véligères du milieu naturel, aux différents stades de la vie pélagique; émissions massives, faible charge en tripton favorisent...
Tipo: Text Palavras-chave: Reproduction; Larves; Véligères; Huîtres creuses; Crassostrea ggias.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/00050/16157/13640.pdf
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Developpement des veligeres de Crassostrea gigas dans le bassin d'Arcachon. Etudes sur les mortalites larvaires. ArchiMer
His, Edouard; Robert, Rene.
Experiments in the hatchery rearing of C. gigas larvae showed that: the antifouling paints represent a real danger for spatting areas; the larvae of Arcachon breeding stocks grown in the seawater taken from the Bay develop normally in the laboratory; and, the growth of the larvae, collected from the Bay of Arcachon and reared in hatchery at 18 degree C, confirms that the last summer temperature regimes could not explain the abnormalities. It also confirms the good quality of the seawater of the bay for C. gigas reproduction.
Tipo: Text Palavras-chave: Crassostrea gigas; Bivalvia; Environmental effects; Veligers; Oyster culture.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/publication-1835.pdf
Registros recuperados: 68
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