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Registros recuperados: 769
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1967-77: ten years of marine geology and geophysics ArchiMer
Le Pichon, Xavier.
Plate tectonics gave a great stimulus to marine geology and geophysics; in the years since its enunciation there have been major drilling programmes, a new science of global palaeoenvironmental oceunography and much more detailed oceanographic surveYs. The pace shows no sign of slackening-in the next few years the passive continental margins will be muchstudied. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/1977/publication-5206.pdf
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40 AR/39 AR ages for the alkaline volcanism and the basement of Gorringe Bank, North atlantic Ocean ArchiMer
Feraud, Gilbert; Gastaud, Janine; Auzende, Jean-marie; Olivet, Jean-louis; Cornen, Guy.
Gorringe Bank is situated on the Europe-Africa plate boundary at the eastern end of the Azores-Gibraltar fracture zone. It has two summits. Gettysburg Bank to the southwest and Ormonde Bank to the northeast. We applied the 40Ar/39AR stepwise heating method to date six samples of the alkaline volcanic rocks. Two gabbros from the Ormonde Bank and a dolerite from the Gettysburg Bank. The results suggest that the alkaline volcanism lasted probably for less than 6 Ma(66-60 Ma). Although the nature of this volcanism precludes any subduction feature during its setting. the alkaline volcanism of Ormonde is probably linked to Upper Cretaceous/Eocene compressive tectonic events. The basement rocks of Gorringe Bank reveal disturbed 40Ar/39Ar age spectra. One...
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/publication-5365.pdf
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A granite cliff deep in the North Atlantic ArchiMer
Pautot, Guy; Renard, Vincent; Auffret, Gérard-andré; Pastouret, Leo; De Charpal, Olivier.
WE report here preliminary results from the detailed sampling of granitic basement at a depth of 4.000 m at the lower edge of the Armorican continental margin near 48°N and 12°W. We consider that we have sampled here the extreme lateral limit of the continental crust where local exposures emerge from under a cover of Cainozoic,Mesozoic and probable Palaeozoic sediments. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1976 URL: http://archimer.ifremer.fr/doc/1976/publication-5181.pdf
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A new genus of Poecilochaetidae (Polychaetous annelids) in the mediterranean : Elicodasia mirabilis ArchiMer
Laubier, Lucien; Ramos, Jeanete.
In the framework of a general study of the benthic communities located on the continental shelf in the Bay of Rosas (on the Spanish Catalonian coast of the Mediterranean), several specimens of a new genus belonging to the small family Poecilochaetidae Hannerz, 1956 were recovered. The object of this study is to describe and classify this unusual organism in relation to the one genus already known in this family. (NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1973 URL: http://archimer.ifremer.fr/doc/1973/publication-5062.pdf
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A photographic survey of a population of the stalked crinoid Diplocrinus (Annacrinus) wyvillethomsoni (Echinodermata) from the bathyal slope of the Bay of Biscay ArchiMer
Conan, Gérard; Roux, Michel; Sibuet, Myriam.
During the 1973 cruise of the BIOGAS deep-sea program, a series of 83 frames showing a high population density of the isocrinid stalked crinoid Diplocrinus (Annacrinus) wyvillethomsoni was obtained from a depth of 1246 m on the bathyal slope of the Bay of Biscay. The spatial distribution of D. wyvillethomsoni appears to be highly aggregated. Mean density is 0.61 m-² with confidence limits determined as 0.53 and 0.69 m-², ranging up to 8 or 10 specimens m-² on a sea floor with pebbles and rocks. D. wyvillethomsoni forms a parabolic filtration fan with its arms strongly recurved into the current. The distal group of cirri grips pebbles or the sharp upper edges of rocks. This active mode of anchorage contrasts with the passive mode in other genera of...
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-5326.pdf
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A propos d'une espèce de paradoneis (polychète paraonidale) nouvelle pour la méditerranée occidentale ArchiMer
Laubier, Lucien.
Among a small collection of Annelida Polychaeta collected in the Banyuls-sur-Mer area which I was sent to for identification by M. Amouroux (Arago Laboratory, 66-Banyuls-sur-Mer) were three specimens of a recently described species of Paraonidae from the Breton coast, Paradoneis armata Glémarec, 1967. Two years later, this species was found in the eastern Mediterranean Sea, on the Cretan coasts (Kalo-Limmiones) in the endofauna of a Halophila stipulacea prairie by Harmelin (1969), who described and figured the main distinctive characters of this Paraonidae (the reference to the original description is erroneous, Glémarec linking this specimen to the genus Paradoneis Hartman, 1965, and not to the genus Paraonides Cerruti sensu Hartman, 1965). The discovery...
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1971 URL: http://archimer.ifremer.fr/doc/1971/publication-5030.pdf
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A schematic model of the evolution of the south atlantic ArchiMer
Le Pichon, Xavier; Melguen, M.; Sibuet, Jean-claude.
A schematic model of the evolution of the South Atlantic ocean is proposed to demonstrate the possibilities offered by the Deep Sea Drilling Project within the framework of Plate Tectonics to reconstruct a logical evolution of the history of the ocean basins and their paleoenvironment. The emphasis is put on the methodology available to reconstruct the ocean crust morphology and its sedimentary cover at all stages throughout the opening of the ocean.Paleobathymetric, deep paleo-water-circulation and paleo-sedimentary - facies maps at five different stages of the opening are presented and discussed. The last type of maps are in great part based on a new paleo - Carbonate Compensation Depth Curve for the South Atlantic which is tentatively proposed here....
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1978 URL: http://archimer.ifremer.fr/doc/1978/publication-5196.pdf
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A statistical relationship between individual heights and periods of storm waves ArchiMer
Cavanie, Alain; Arhan, X; Ezraty, X.
The goal of this short communication is to present a theoretical joint probability distribution for wave heights and periods developped in 1975 at the Centre 0céanologique de Bretagne. This research program was proposed and financially supported by the Association de Recherche Action des Elements (group fomed of 9 french companies or government agencies) which also carried out analysis of 200 twenty minute storm wave recordings in the North Sea selected from Waverider data kindly placed at our diaposal by the United Kingdom Offshore Operators Association. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1976 URL: http://archimer.ifremer.fr/doc/1976/publication-5183.pdf
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Accumulation de Fe, Cu, Zn, Mg, Mn et Co dans l'ovaire de Carcinus maenas L. au cours de l'ovogenèse ArchiMer
Martin, Jean-louis.
During ovogenesis the ovary of Carcinus maenas shows a continuous accumulation of Fe, Cu, Mg, Mn and Co. For Zn the accumulation seems to stop for gonad indexes near 6.5. The goal of this accumulation is not determined. Nevertheless we suppose that it is in relation with the role of organic reserves that possess the female sexual cells in decapods and with the synthesis of enzymes and hemocyanin. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1976 URL: http://archimer.ifremer.fr/doc/1976/publication-5107.pdf
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Actions réciproques des diatomées, des huîtres et du milieu ArchiMer
Bachrach, E.; Jullien, A.; Lucciardi, N.; Richard, J.-g..
The ponds are a cultivation environment not only for the oyster but also for the rich microscopic flora and fauna which go together with the lamellibranch. The Diatoms are the focus of the oyster farmers as they not only contribute to the molluscs' nutrition but are also susceptible to change the colour of their gills in specific environmental conditions. We carried out in parallel an experimental study on the oyster and on the marine diatoms, and aimed to precise the optimal conditions for these two organisms, in order to know if they are the same for both of them.
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1936 URL: http://archimer.ifremer.fr/doc/1936/publication-5754.pdf
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Activités amylasique et trypsique des principales espèces de poissons de l'estuaire interne de la Loire en relation avec l'environnement trophique ArchiMer
Marchand, J.; Samain, Jean-francois.
Quantitative and qualitative relations between the activity of the digestive enzymes (amylase and trypsin) and the nutrition of young fishes of five species (bass, whiting pout, sole, flounder and mugil) of the Loire estuary are analyzed.
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/publication-5973.pdf
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Activités amylasique et trypsique du zooplancton-indices de nutrition ? perspectives et limites ArchiMer
Samain, Jean-francois; Moal, Jeanne.
The regulation of the synthesis of the digestive enzymes of the zooplankton and the brine shrimp (amylase and trypsine activity) has been studied to find some nutrition indexes enabling the description of the zooplankton's nutritive activity in situ. These regulations lead us to tackle three domains of pelagic ecology:- The evaluation of the organisms' nutrive needs and the capacity of the environment to satisfy them.- The monitoring of the pelagic ecosystem- The disturbance of the ecosystems.
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/publication-5972.pdf
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Activités amylasiques et protéasiques chez les actinies, influence de l'alimentation sur les activités mesurées ArchiMer
Van Praet, M..
Seasonal variations of the amylasic activity, which increased during June, was correlated to the participation of microalgae to the food of Actinia equina L. In summer, individual variations revealed the existence of different microenvironments.
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/publication-5974.pdf
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Adaptation des Echinodermes à la vie abyssale ArchiMer
Sibuet, Myriam.
The synthesis of literature and personal observations permitted to show the main morphological physiological and genetic characteristics with relation to the mode of life of abyssal echinoderms. The large ventral sole is common among holothuroids and asteroids which creep on the bottom. The development of large podia and their ability to swim are particular to the abyssal family Elasipoda (Holothurioidea). The paper gives examples of opposite skeleton constitution either heavily or lightly calcified. The little knowledge about the biology of these animals shows the absence of a strict diet and of a particular mode of reproduction. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/publication-5408.pdf
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Adaptations morphologiques et biologiques chez un aphroditien interstitiel : pholoe swedmarki sp.n. ArchiMer
Laubier, Lucien.
The first record of interstitial polychaetous annelids dates no more than forty years. Presently, the total number of interstitial species described is about one hundred. Up to the present, the large group of Aphroditoidea includes no interstitial representative. A few samples made by Pr Swedmark and M. Lasserre in Bermudas enable the discovery of an undescribed species of an interstitial Sigalionidae, Pholoe swedmarki Sp. n., together with two other interstitial species of Pisionidae and Syllidae, new to the western tropical atlantic. From a morphological point of view, the comparison of P. swedmarki sp. n. with the other species of the genus reveals some adaptations to the interstitial life: reduction of the body size, reduction or, at the contrary,...
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1974 URL: http://archimer.ifremer.fr/doc/1974/publication-5462.pdf
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Additional experiments on the growth of juveniles and fingerlings of the european sea bass (dicentrarchus labrax L.) ArchiMer
Chervinski, Jonathan; Shapiro, James.
Laboratory experiments were conducted with juvenile Dicentrarchus labrax L. in order to determine their ability to grow and develop in fresh water on small zooplankton and zoobenthos. Fish of 0.036g. weight were able to grow on small Cladocera and Copepods. Juveniles of 25-29mm total length were able to feed on fry of Sarotherodon sp. D. labrax of 0.77g weight, fed Sarotherodon sp. showed an individual growth rate of 0.06-0.11 g/day and a food conversion rate of 8.18 when raised to the size of 3.57g. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-5383.pdf
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Aeromagnetic survey of south-western europe ArchiMer
Le Borgne, Eugéne; Le Pichon, Xavier.
The results of a precise and homogeneous aeromagnetic survey covering the Bay of Biscay, France, and the North Western Mediterranean are presented. The results suggest that the Bay of Biscay and the Mediterranean basin were created since the Triassic by drift of the adjacent continents. Indications are given about the times and geometries of opening of these basins. The implications of these results on the Mesozoic and Cenozoic tectonic history of South-Western Europe are important. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1971 URL: http://archimer.ifremer.fr/doc/1971/publication-4919.pdf
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Age précambrien de dolérites de la dorsale réguibat (Mauritanie) ArchiMer
Dosso, Laure; Vidal, Philippe; Sichler, Bertrand; Bonifay, Alain.
Rb-Sr age determination on ten doleritic samples from the basement of Mauritania yield on average of 1 609 45 M.A. ( ?87 Rb = 1,42.10- an- ). Four among the specimens have been dated by the K-Ar method with ages of 1.750, 1.610, 832 and 1.46 x M.Y. The radiometric data are interpreted as evidence for emplacement of the dolerites at the end of the Eburnean orogeny. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/publication-5251.pdf
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Alteration, fractional crystallization, partial melting, mantle properties from trace elements in basalts recovered in the north atlantic ArchiMer
Bougault, Henri; Joron, Jean-louis; Treuil, Michel.
.-Alkali metals prove to be very sensitive to alteration process even if this process is moderate. It is very difficult to use these elements to trace magmatic processes since their concentration may Vary within an homogeneous "unaltered" unit. From all the basaltic units investigated, a classification of "low partition coefficient" elements is presented (Sc, Ti, V, Y, Zr, Nb, La-Tb , Hf, Ta, Th) . The incompatible elements ratios (Y/Tb, Zr/Hf, Nb/Ta) are constant in the samples studied and are nearly equal to the same ratios in chondrites. This is consistent with the existence of an homogeneous primordial mantle at the scale of the North Atlantic, compatible with a chondritic composition of the earth. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/publication-5253.pdf
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An oceanographic grid system for coastal and continental margin areas ArchiMer
Le Gall, Jean-yves.
In the Marsden Square Grid System, or its derivations - and this is the system that most national and international oceanographic data acquisition centres employ - the information is located geographically for statistical purposes by means of a grid consisting of 10°, 5° or 1° " squares ". The system, an early one dating from 1850, has three major disadvantages, and this has meant that its numbering principle cannot be used for a grid whose smallest lattice is less than 1° of latitude by 1° of longitude. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: Histoire Ifremer.
Ano: 1974 URL: http://archimer.ifremer.fr/doc/1974/publication-5157.pdf
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