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| Registros recuperados: 68 | |
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| 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. |
| Tipo: Text |
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| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00091/20268/17912.pdf |
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| 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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| 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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| 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... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00095/20628/18255.pdf |
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| 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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| 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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| 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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| 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... |
| Tipo: Text |
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| Ano: 1970 |
URL: http://archimer.ifremer.fr/doc/1970/publication-3137.pdf |
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| 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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| 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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| 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... |
| Tipo: Text |
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| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/these-3352.pdf |
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| 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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| 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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| 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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| Registros recuperados: 68 | |
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