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| Registros recuperados: 1.029 | |
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| Grizel, Henri; Comps, Michel; Bonami, Jean-robert; Cousserans, F.; Duthoit, Jean-louis; Le Pennec, Marie-annick. |
| Numerous diseases have been described in Ostrea and Crassostrea oysters and especially in cultivated species of commercial interest. The lack of growth, but more often mortalities, are in most cases the most obvious symptoms of this supposed sickness. The consequences of these epizooties can be so bad that they can result in the disappearance of an entire oyster population from a determined area as for Ostrea edulis L. in 1920-1921 (Dollfus, 1922) on some coasts of Europe and for Crassostrea angulata LMK in 1970-1971 on the French Atlantic coast and especially in the Marennes-Oléron and Arcachon basins. These cases can be considered as extreme cases as most of the time, oysters are only subjected to a number of episodic affections, affecting the farms only... |
| Tipo: Text |
Palavras-chave: Glande digestive; Maladie; Pathologie; Ostrea edulis; Huître. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-6286.PDF |
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| Renard, V.; Malod, J.. |
| The Barents Sea is underlain by a thick (up to 5 km) sedimentary basin. Seismic refraction has outlined four main velocity discontinuities which have been correlated with geological units on the basis of the geological history of the region. The basin is underlain by a crystalline basement, the nature of which cannot be determined on the basis of seismic velocity alone. Metamorphosed Paleozoic units (velocities around 5-4 km/sec) lie over this basement. Their thickness is not well established but appears to reach 1 or 2 km in some cases. A very distinct and thick (up to 2.5 km) layer (4.1 km/sec) is found almost everywhere and is thought to correspond to a major discontinuity at the end ot the Paleozoic. This discontinuity is followed by a variable... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5447.pdf |
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| Reyss, Daniel. |
| 21 species of Cumacea have been collected during 10 dredgings in the Ionian Sea and the northern Aegean Sea. Two new species are described : Makrokylindrus aegaeus and Diastylis charcoti. The vertical distribution of the species in the Eastern Mediterranean is the same as that in the Western Mediterranean. Cumacea seem to be rare or absent at depths exceeding 4000 m. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5129.pdf |
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| Chardy, Pierre. |
| Genus Janirella Bonnier, 1885, has numerous members in the North Atlantic Ocean (J. nanseni Bonnier, 1885; J. abyssicola Richardson, 1911; J. glabra Richardson, 1911; J. spongicola Hansen, 1916; J. lobata Richardson, 1908; J. laevis Hansen, 1916; J. vemae Menzies, 1962; J. priseri Chardy, 1972) as well as in the adjoining seas (J. bonnieri Stephensen, 1915 in the Mediterranean Sea and J. carribica Menzies, 1956 in the Caribbean Sea). Two new species have been added to this list, J. bocqueti sp. n. and J. laubieri sp. n., collected during the Noratlante cruise of the R.S. "Jean Charcot". |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5118.pdf |
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| Pautot, Guy; Dupont, Jacques. |
| The Marquise fracture zone is an elongated structure, with an irregular topography, which distinguishes areas of different depths. It is 3 500 km long, from its contact point with the oceanic crust of the East-Pacific ridge to its contact point with the northern end of the Touamotou archipelago. Its general direction is West-South-West - East-North-East. It is made up of 5 segments whose morphology and direction differ. These segments' inflection points correspond to those of the North Pacific fractures. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5461.pdf |
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| Goslin, J.; Mascle, Jean; Sibuet, Jean-claude; Hosking, H.. |
| The landward termination of Walvis Ridge consists of two east-trending basement ridges of probable basaltic composition enclosing a relatively important sedimentary basin. East of long. 10° E., the southern ridge disappears under the sediments of the continental margin. The trends of the basement ridges are in good agreement with the inferred direction of initial opening. Since its formation, the Walvis Ridge has probably dammed sediment coming from the south. The proposed identification of layer A, a very strong horizon over which the reflectors are nearly undisturbed, may indicate that no major tectonic phase has affected this area since the shift of the pole of opening for the south Atlantic in Late Cretaceous-early Tertiary time. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5147.pdf |
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| Sibuet, Jean-claude. |
| Il y a environ 200 m. a. (millions d'années), le golfe de Gascogne n'existait pas ; les rebords des plateaux continentaux du nord de la péninsule ibérique et de l'Europe étaient jointifs. Bien que des cassures se soient produites dès la fin du Trias (200 m. a.), le mouvement d'ouverture du golfe de Gascogne aurait commencé dès la fin du Jurassique (136 m. a.) pour se terminer au Crétacé supérieur (80 m. a.). La péninsule ibérique aurait subi, par rapport à l'Europe, une rotation d'environ 23 degrés autour d'un pôle situé près de Paris. Du Crétacé supérieur à l'Eocène supérieur (38 m. a.) un mouvement de compression d'une cinquantaine de km d'amplitude, entre la péninsule ibérique et l'Europe stable, serait responsable de la formation des Pyrénées et... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5134.pdf |
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| Le Men, R; Diner, Noel. |
| Au cours de ces premiers travaux la distribution spatiale du champ électrique a été étudiée pour différents types d'électrodes. Afin d'arrêter les caractéristiques exactes du système le plus approprié, il importe de connaître de manière précise le comportement de poissons d'eau de mer soumis à un champ électrique et plus particulièrement celui des espèces auxquelles doit s'appliquer cette technique de pêche. C'est justement l'objet des études définies dans l'annexe scientifique jointe au contrat C.N.E.X.O./I.S.T.P.M. n° 72/454 dont le présent rapport rend compte. OCR NON CONTRÔLE |
| Tipo: Text |
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| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/rapport-3964.pdf |
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| Merceron, Michel. |
| En agriculture, le passage de l'élevage traditionnel à l'élevage dit industriel a été rendu possible, entre autres éléments, par la disponibilité régulière d'un aliment de qualité suffisante et bon marché. Pour son développement, l'aquaculture des animaux carnivores requérira également la disponibilité d'un aliment présentant les mêmes avantages. Il ne servirait de rien de produire de fortes quantités de stades juveniles en écloserie si nous n'étions pas aptes à assurer leur croissance ultérieure dans des conditions économiquement satisfaisantes. Il n'est donc pas prématuré de se pencher sur ce qui pourra être le ou les aliments qui répondront à cette exigence. Nous limiterons évidemment cette étude au cadre des régions tempérées et nous laisserons de... |
| Tipo: Text |
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| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00151/26193/24212.pdf |
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| Reyss, Daniel. |
| The genus Makrokylindrus Stebbing, 1912, is characteristic of deep waters, since, out of the 32 species know to this day, only two, M. serricaudata (Scott, 1912) and M. fistularis (Calman, 1911), have been collected at depths of less than 200 m. The study of collections from previous cruises in the North Atlantic Ocean enabled us to identify some of the 11 species already known in this area and to complete the inventory of this genus by describing 7 new species. The studied material comes from the following cruises: - Noratlante cruise (R.S. "Jean Charcot", August-September-October 1969) of the Brittany Oceanology Centre (NOR). - cruises by H. L. Sanders (Woods Hole Oceanographic Institution) on board the "Gay Head- Bermuda transect", 1960-1969 (BER). -... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5116.pdf |
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| Laubier, Lucien; Lafarge, Françoise. |
| Based on specimens collected in the western Mediterranean, a redescription is provided of Brementia balneolensis Chatton - Brément, notodelphyid copepod parasitic in the ascidian Polysyncraton canetensis Brément. In the same host lives another species of Notodelphyidae new to science, whose general morphology is similar to that of B. balneolensis, from which it differs definitely by numerous characteristics. Our present knowledge of the phylogeny of ophioseidimorph Notodelphyidae refrained the authors to establish a new genus for this new species, described under the name of Brementia illgi. A discussion on phylogenetic trends in the genus Brementia and its relationships with other Notodelphyidae, together with some remarks on the host specificity of... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5141.pdf |
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| Auffret, Gérard-andré; Pastouret, Léo; Chamley, Hervé; Lanoix, Franz. |
| The extent to which the prevailing current regime controls the nature of surface sediments in the Alboran Sea is suggested. Hydrographic data and surface sediments collected during the Polymède II cruise of the R.V. Jean Charcot in 1972 strongly suggest that the sediment distribution is controlled by the current system resulting from the difference in density between the Intermediate and Deep Mediterranean Water and Atlantic Surface Water. Clay, mainly montmorillonite, and planktonic Foraminifera are carried into the Mediterranean by east-flowing Atlantic Surface Water. As the suspended particles settle through the water column, they are redistributed by the westward-flowing deep currents and accumulate on the floor of the sea, where they constitute a... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5158.pdf |
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| Bougault, Henri. |
| Ti, V, Cr, Fe, Co, Ni, Cu, and Zn have been analyzed from Sites 211, 213, 214, 215,and 216 of DSDP Leg 22 of the Glomar Challenger in the northeastern Indian Ocean. According to these trace elements, three different types of source material are broadly defined : the basin floor basalts with a composition similar to tholeiites from mid-oceanic ridges, the basalts and the differentiated rocks from the Ninetyeast Ridge, and the diabase and amphibolite from Site 211. In this paper the notion of stabilization energy in a ligands field is summarized, analytical techniques used are described, and certain conclusions based on the results are presented. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5145.pdf |
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| Loubersac, Lionel. |
| Une campagne de détection aérienne de rejets frauduleux d'hydrocarbure en mer comprenant 11 vols a été organisée du 26 Août au 14 Septembre 1974. Le Scanner infra-rouge Supercyclope a permis l'observation de plus de 150 navires, certaines constatations sur l'allure générale d'un sillage en infra-rouge, les anomalies thermiques qui l'accompagnent et le comportement physique des rejets ont pu être faites. |
| Tipo: Text |
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| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00105/21618/19198.pdf |
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| Registros recuperados: 1.029 | |
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