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| Registros recuperados: 883 | |
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| De Kergariou, Gabriel. |
| A traditional activity on the Breton coast, spider crab fishing has grown more important over the past few years, not due to an increase of the number of catches but to a significant decrease in the number of lobsters and crayfishes brought to the market, following the closing of some fishing areas (Anglo-Norman Isles, Ireland, England) and the exhaustion of others. |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-6664.pdf |
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| Mascle, Jean. |
| In a previous article published in the "cahiers Océanographiques" XXII, 1 (January 1970), pp. 25-32, I described the broad lines of subactual sedimentation in and around the canyon of Toulon. This data had been collected during a drilling cruise conducted in October 1967. Out of the 41 successful drillings, 17 had enabled the collection of rock samples representing, either the Maures basement in which the canyon of Toulon is cut, or more recent deposits, episodes of the eustatic or tectonic variations of the water level over the Quaternary and maybe the Pliocene era. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-4890.pdf |
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| Le rapport présenté par le CNEXO sur ses activités au cours de l'année 1971 s'efforce de montrer comment l'action de l'organisme s'est insérée dans un contexte général caractérisé par une accélération sensible des développements industriels en mer. Le plan adopté qui diffère de ceux des rapports précédents (1968-1969-1970), cherche à présenter de façon particulière dans la partie intitulée "Effets d'une politique d'incitation", certains aspects des activités de coordination du CNEXO et des résultats que l'action de l'organisme a permis d'atteindre au cours de l'année 1971. L'année 1971 a en effet été marquée par un certain nombre de succès remportés par l'industrie océanique française, notamment en matière d'équipement de l'exploitation pétrolière, dans la... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/rapport-4815.PDF |
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| Aloncle, Henri; Delaporte, Francis. |
| De nombreuses campagnes de recherches sur les thonidés et plus particulièrement sur le germon ont été faites depuis 1950. Elles ont d'ailleurs donné lieu à diverses publications et notamment à l'établissement d'une carte montrant l'apparition et les déplacements du germon en début de campagne. Ces recherches ont été reprises systématiquement en 1967 après la mise en service de "La Pelagia", navire spécialement équipé pour cette étude. Les travaux entrepris à bord se situent sur trois plans : a) aide directe à la pêche par la recherche des concentrations de thons, ces prospections s'effectuent essentiellement à partir de l'examen des conditions hydrologiques des secteurs étudiés ; b) marquages systématiques des thons blancs et, éventuellement, des... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-7005.pdf |
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| Herrbach, Bernadette. |
| Samples of oysters, Ostrea edulis, collected from badly decimated beds in the Belon estuary in July 1969 and July 1970 were examined microscopically in an attempt to determine the cause of death. Although large numbers of ciliates belonging to the ancistrocomidae were found in the digestive mass, no sign of any parasitic or viral disease was found in the tissues. On the other hand, oysters in poor condition exhibited a hypersecretion of mucopoly-saccharides covering the whole surface of the gastric epithelium. This condition, and the existence of a massive infiltration of the connective tissue and the blood sinuses by hyaline haemocytes, indicates a defense reaction against some unknown changes in the physico-chemical environment. |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2378.pdf |
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| Cavanie, Alain. |
| In a previous article (1969), the author demonstrated, through the use of a hydrostatic model and of the Boussinesq hypothesis, the importance of some non-linear terms in the formation of inner fronts; this model provides a criterion for the easing and intensification of the slope of a simple wave according to the wave's upshore conditions. In this article, the use of a regular perturbation method enables us to free ourselves both from the long wave hypothesis and from the Boussinesq hypothesis. The theoretical model we created demonstrates the importance of non-linear terms in the formation of secondary oscillations upshore from the front. A phenomenon which was extensively observed in the eastern part of the Gibraltar straight. As the parameters of the... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1970/publication-4885.pdf |
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| Herrbach, Bernadette. |
| During the summer of 1968, an abnormal mortality rate struck the flat oyster, O. edulis, raised in the upstream part of the Aber Wrach, a ria of Brittany's north coast. During the autumn, the phenomenon expanded steadily and progressively reached the various sectors of the estuary up to its mouth. Losses often reached and exceeded half the stock of oysters of all ages that were held there. The molluscs that survived, whether they were left where they were or transferred to other oyster-farming areas, had a deficient look characterised by a lack of growth, paleness of the digestive gland and an often very marked weight loss. On the weakest ones, the parasite flagellate Hexamita sp. was frequently found. In January 1969, changes similar to those noticed in... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2388.pdf |
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| Olivet, Jean-louis; Auzende, Jean-marie; Mascle, Jean; Monti, S.; Pastouret, Léo; Pautot, Guy. |
| Recent data on the western Mediterranean basin (Joides cruise, Montadert et al., 1970, Auzende et al., 1971, Le Borgne et al., 1971) and its connection with the evolution of the Atlantic area (Le Pichon et al., 1970, Talwani et al., 1971, Le Pichon et al. in writing) lead us, like other authors (Dubourdieu, 1962, Stanley and Mutti, 1968, Ryan, 1969 amongst others) to admit the theory of an opening of the Algero-provencal basin during the Cenozoic era. A series of arguments drove us to formulate the hypothesis of an Oligocene age (in process). This work is in line with this perspective. [...] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-4907.pdf |
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| Fougeras Lavergnolle, Jean. |
| Contamination from pesticides worries hygienists, who fear that content levels will rise in food to the point of causing incidents. The use of pesticides is becoming more generalised, for they have been found in noticeable concentrations in the marine environment, where they have even caused accidental mortalities of animal life, following a treatment against parasites along a riverbank. Thus, shrimp mortalities were observed along the South Carolina coast a few days after a heptachlor treatment (SOUDAN). Many authors, especially BUTLER and DAVIS, agree on recognising that organochlorines are the most toxic pesticides; DDT is one of the most toxic. BUTLER (1966) has shown that oysters are very good detectors of organochlorine pesticides, which they... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2373.pdf |
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| Le Gall, Jean-yves; L'Herroux, Michel. |
| 1 - The authors study and compare the biovolumes of 69 samples taken with the Isaacs-Kidd midwater trawl during the Polymède expedition on the N. O. "Jean Charcot" (May and June, 1970) in the western Mediterranean and in the vicinity of Cap Finisterre. 2 - The authors, having assembled the measurements of physical oceanographers, have prepared a diagram of the deep-current issuing from the Mediterranean into the Atlantic North- East. It is possible to superimpose on this diagram the route used by the young albacore (Thunnus alalunga) during their annual summer migration. This correspondance suggests an inter-relation between the two phenomena provided by intermediate trophic levels. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/rapport-4850.PDF |
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| Gras, Paul. |
| A microbiological study of the water and substrate in the Belon River was carried out during the summer of 1967, when the stocks of cultured oysters suffered very high mortalities. At the same time as the oyster mortalities there were dramatic decreases in the numbers of organisms, such as the diatoms and dinoflagellates, in the water. The numbers of bacteria, on the other hand, both in the water and in the surface layers of the substrate, reached very high levels, particularly amongst the anaerobic forms. It seems that the death of most of the organisms and the proliferation of the bacteria was due to the arrival of highly saline and cold water, which was rich in nutritive salts and poor in dissolved O sub(2). The augmentation of this water by organic... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2379.pdf |
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| Deltreil, Jean-pierre. |
| In a previous study, we gave an account of the impact that the development of gill disease had on Portuguese-oyster farms in the Arcachon basin. The interest of these observations was being able to capture the magnitude of the phenomenon from the time it appeared and to single out the immediate consequences; they were, however, limited in time and incomplete because they affected only three-year-old subjects born on site and already, for the most part, marketable. Indeed, the footprint of the disease that we had taken from that year on the spat itself made us fear the longer-term consequences; they could only be appreciated based on young individuals affected from 1967 on and monitored to the end of their stockbreeding. It was, moreover, desirable to... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2389.pdf |
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| Bonami, Jean-robert; Grizel, Henri; Vago, Constantin; Dutholt, Jean-louis. |
| Digestive glands of Ostrea edulis affected by an epizootic have been examined by light- and electron- microscopy. Round, compact lesions in the digestive gland cells contain refractive elements staining slightly blue or red with Geimsa. Ultra-structurally, each lesion contains (a) dense cytoplasma, without mitochondria and with paracrystal-line inclusions, (b) enclosed regions with vacuolar cytoplasm, no mitochondria and two types of formation; one is opaque, the other a vacuole containing ribosomes, lamellar structures and peripheral ovoid particles. The nature and significance of these structures is not known. |
| Tipo: Text |
Palavras-chave: Histology; Epizooty; Ostrea edulis. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2238.pdf |
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| Le Pichon, Xavier; Sibuet, Jean-claude. |
| The kinematics of the Eocene episode of compression between the Iberian and European plates is examined. It is proposed that the boundary between the two plates extended West of the Pyrenees, along the Spanish marginal trench to end West of King's trough at a triple point junction. The pole of relative rotation computed within this hypothesis lies near 5°N ; 62°W and the resulting shortening along the Pyrenees is about 50 km dong 45°E. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-4918.pdf |
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| David, Annick. |
| Ce travail a été réalisé en collaboration avec les chercheurs et le personnel de l'Institut des Pêches maritimes (Laboratoire de Sète), dans le cadre d'une convention de recherche financée par le CNEXO. Il comprend deux parties : la première traite des ressources nutritives du milieu représentées par le plancton végétal ; la seconde, des relations trophiques entre les huîtres et les ciones. |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-7007.pdf |
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| Registros recuperados: 883 | |
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