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| Registros recuperados: 1.019 | |
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| Desde as ultimas reuniões técnicas, vem-se notando a grande necessidade de correlação e intercâmbio mais efetivo entre as diferentes frentes de trabalho da DPP (Ex-EPFS). Embora se tenha programado excursões de estudos de campo as diferentes áreas em que a DPP desenvolve suas atividades, nem sempre foi possível realizá-las devido, principalmente, a escassez de recursos financeiros para tal objetivo. Portanto, esta pode ser considerada como a primeira excursão de estudos de correlação em que foram visitadas três frentes de trabalho, com a participação integral dos técnicos responsáveis pelo Levantamento dos Solos do Território Nacional. Teve a duração de 21 dias, compreendidos no período de 2 a 22 de julho de 1968. Foram percorridos 5.080 km de estradas e... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Classificação do solo; Reconhecimento do solo; Soil classification; Soil surveys.. |
| Ano: 1972 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/327952 |
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| Thiriot-qievreux, Catherine. |
| The observation of the planktonic larval shells of different species of Prosobranches is carried out with scanning electron microscopy (Cambridge, Stereoscan 4). The influence of different fixing agents (non-acetified) on the conservation state of larval shells is not really clear at low magnifications. On the contrary, at high magnifications, the results are clearly better after using an alcohol fixation or without any fixing agent at all. The morphological differences of the larval shells of four species of Philbertia: P. gracilis (Montagu), P. linearis (Montagu), P. leufroyi (Michaud) and P. purpurea (Montagu) are precised. The microstructure of the shells of Firoloida desmaresti Lesueur and Atlanta fusca Souleyet larvae is observed. Scanning electron... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5049.pdf |
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| Cavanie, Alain. |
| MM. Lacombe, Frassetto and Ziegenbeim's observations, based on different measurement methods, demonstrated the existence of inner fronts and short period oscillations at the interface separating the Atlantic and Mediterranean waters in the eastern part of the Gibraltar straight. These observations show that inner fronts are created by the following mechanism: during the incoming tide, the westward current pushes the Mediterranean waters against the threshold of Gibraltar and, when getting to high tide, when the tide current becomes null, the interface is far from a balanced position, too high to the east, too low to the west of the threshold. The density currents caused by this imbalance creates an inner front of amplitude of more than 50 m which moves... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-4896.pdf |
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| Pautot, Guy; Auzende, Jean-marie; Olivet, Jean-louis; Mauffret, Alain. |
| The alignment of the Balearic Islands, stretching from the Spanish mainland towards the Corsican-Sardinian block, has long intrigued many geologists. Since Suess (1886), we know that the Balearic block (Ibiza, Formentera, and Majorca) is part of the Alpine system. Many authors (Kober, 1914; Staub, 1928; Kober, 1931) have subsequently attempted to comprehensively integrate the history of the Balearic block within the history of the Alpine chain. In this paper, we will use data from marine geology and geophysics to define the location of the Balearic Islands during the diverse phases of distension, shearing, and compression between the European and African plates, which created the present western Mediterranean and the Alpine chain. In particular, we will... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5035.pdf |
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| Fiquet, André. |
| This inventory of sites favourable for aquaculture on the coasts of Brittany involves the joint goal of the French National Centre for the Exploitation of the Oceans (CNEXO) and the Brittany Region that aims to reserve certain sites to install the structures necessary for aquaculture. The CNEXO continues its efforts, initiated several years ago, to promote aquaculture on French coasts. The Brittany prefecture was the first to request this type of study and wishes to integrate aquaculture as part of coastal spatial planning. The Aquitaine prefecture has since then also requested a similar study that is now in progress. Aquaculture in France is now in a transition period between an experimental phase and the industrial-scale implementation phase. A certain... |
| Tipo: Text |
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| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/rapport-4111.pdf |
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| His, Edouard. |
| L'introduction d'une nouvelle espèce d'huître donne souvent lieu à des débats passionnés dans les milieux ostréicoles. Ch. MARTIN en donne un exemple dans son ouvrage "Agriculteurs de la Mer" ; il rapporte les mesures restrictives qu'avait entraînées l'importation de l'huître portugaise à Arcachon au début du 20e siècle. Un des arguments avancés pour expliquer les réticences était celui de la "concurrence vitale" et de la compétition sur le plan nutritionnel entre Crassostrea angulata et Ostrea edulis, l'huître plate, qui était alors seule exploitée dans la baie. Il fallut attendre les mortalités massives de 1920, qui anéantirent presque complètement la "gravette", pour que soit envisagée une reconversion de l'ostréiculture par l'exploitation de l'huître... |
| Tipo: Text |
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| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-7088.pdf |
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| Sibuet, Myriam; Cherbonnier, Gustave. |
| The observation of a series of young individuals of growing size, belonging to the abyssal species Plutonaster bifrons (Wyv. Thomson), with scanning electron microscopy, shows the appearance and development of morphological structures. An animal of R = 5.55 mm presents enough characters to identify the species, but if its size is smaller than R = 0.85 mm, one witnesses a significant development of some specific characters. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5065.pdf |
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| L''Herrou, Roger. |
| Deux espèces de merlus sont représentées sur les côtes nord-est des Etats-Unis et du Canada : Merluccius bilinearis (MITCHILL, 1814) et Merluccius albidus (MITCHILL, 1818), respectivement appelés "silver hake" et "off shore hake" par les anglo-saxons. Le premier fréquente la bordure occidentale de l'Atlantique depuis le cap Hatteras en Caroline du nord jusqu'au Grand banc de Terre-Neuve tandis que la limite septentrionale d'extension du second ne dépasserait pas le banc Georges. |
| Tipo: Text |
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| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-7089.pdf |
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| Paulmier, Gerard. |
| Ces recherches couvrent la période de 1964 à 1970 ; elles concernent l'étude physico-chimique du milieu, celle du plancton, notamment le phytoplancton, et l'incidence de ces éléments sur le déroulement du cycle vital des huîtres. Bien que traitant de problèmes différents, ces travaux sont, dans leur ensemble, complémentaires de l'étude plus vaste effectuée par MARTEIL (1960) sur l'écologie des huîtres du Morbihan. |
| Tipo: Text |
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| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/00448/55957/57437.pdf |
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| Maggi, Pierre. |
| Toxicity of seven emulsifying agents for treating oil spills (ISTPM designation E sub(22), E sub(30), E sub(41), E sub(46), E sub(47), E sub(52) and E sub(53)) was determined using eight marine species (three gastropods, one bivalve, two crustacean and one fish). Results are tabulated as LD sub(50). E sub(47) was least toxic to the species studied, but it could still perhaps harm other plant and animal species. |
| Tipo: Text |
Palavras-chave: Treatment; Pollution; Oil spills; Toxicity. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2074.pdf |
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| Soudan, France. |
| Following the Torrey Canyon disaster, attention was directed to finding effective but innocuous means to combat the pollution risk of shipping oil. To introduce the minimum of chemicals into the sea, it was decided to use a little of a strong, but possibly more harmful, substance rather than more of a weaker and less offensive one. Marine life could be affected mechanically, chemically or by removal or dissolved O sub(2). Various products were tested under laboratory conditions for effectiveness, and possible effects on marine life. It is noted that the latter is only a short-term view, and that different results might be obtained using different species as indicators. The range of effectiveness of products was considered. It was concluded that low density... |
| Tipo: Text |
Palavras-chave: Results; Torrey Canyon; Choice; Oil spills; Pollution. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2071.pdf |
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| Avedik, Felix; Renard, V.. |
| Seismic refraction at sea and on continental shelves requires most of all a precise positioning of the shooting and receiving stations and a good signal to noise ratio. A new system has been developed using detectors anchored on the sea floor and radio transmission of signal for refraction work on continental shelves. This technique satisfies both requirements. The system has been tested in the western Channel in December 1971. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5125.pdf |
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| Longere, Paul; Dorel, Didier; Marin, Jean. |
| 2 ponds (or lagoon) were studied in order to establish the economic possibilities of their exploitation for oysters. Bathymetric and sediment maps were produced using methods described. They indicate a morphological similarity between the ponds, with a superficial broken bed and a regular, flat or gently sloping bed beyond 7 m, the general form reflecting the aerial relief of the adjacent `coast'. The deeper regions had mud or clay sediment, while the edges of the ponds were covered with sand. In more detailed studies it was evident that the banks of Diane were more regular and steep than those of Urbino, and that only in the latter was there a good relationship between the depth of water and the carbon/nitrogen ratio. Differences are thought to relate to... |
| Tipo: Text |
Palavras-chave: Corsica; Studies; Exploitation; Oysters; Sedimentologic; Bathymetric. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2068.pdf |
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| Chardy, Pierre. |
| La plupart des systèmes de classification et d'ordination (GREIG-SHITH, 1964 ; WHITTAKER, 1967) sont fondés sur la comparaison de variables prises deux à deux et sur le regroupement de ces variables en catégories. En écologie, les variables peuvent être des espèces ou des prélèvements selon qu'il s'agit d'analyse en mode -Q ou en mode -R. [OCR NON CONTRÔLE] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5053.pdf |
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| Hekinian, Roger. |
| THE Walvis Ridge is a non-continuous aseismic feature in the south-eastern Atlantic Ocean with a general trend north-east/ south-west. Close to the principal interruptions of the ridge is a north-south topographiç lineation shown on Simpson's map (Fig. 1). The ridge appears to be attached at its northeast end to the shelf of Angola and South-west Africa and at its south-west end to the east flank of the Mid-Atlantic Ridge through two volcanic islands, Tristan da Cunha and Gough (Fig. 1). These two islands are made up of recent alkalibasalt-trachyte suite². . The geology of the Walvis Ridge has remained relatively unknown. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-5124.pdf |
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| Le Calvez, Yolande. |
| Foraminifera were abundant in samples obtained from the Mauritanian coast. Their ecology and geographical location was studied. The genera and species are initially grouped according to the nature of the seabed and its depth. Those found in (1) deep mud at 500-1200 m, (2) muddy sand at 20-340 m, (3) shelly sand at 30-52 m are considered in turn. Group (I) varied according to the station of collection, and were affected by factors in addition to depth, such as the presence of corals. Muddy sand was poor in large individuals and in empty shells, but contained many displaced littoral forms. The very few living forms found in the shelly sand area was surprising; it may reflect the constant agitation of the sand or the small size of individuals, which could... |
| Tipo: Text |
Palavras-chave: Foraminifera; Atlantic Sahara coast; Indexing in process. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/publication-2045.pdf |
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| Thomas, Yves-f.. |
| L 'étude de l'évolution géomorphologique des domaines infra et intertidaux, ainsi que lorsqu'il y a lieu, le proportionnement des ouvrages de défense des côtes, constituent un préalable à l’implantation d’infrastructures (infrastructures portuaires) ou d'activités diverses (exploitation des agrégats) sur la frange maritime du milieu littoral. Il en résulte une nécessaire connaissance de la cinématique des eaux marines à proximité du, voire à même le rivage. L 'objet de cette étude est la présentation du facteur houle, agent de la dynamique des fonds. Aussi traiterons nous succèssivement: - l'observation de la houle - le traitement de l'information - l'intérêt géodynamique des études de houle après quoi, il sera présenté un exemple de régime de houle : -... |
| Tipo: Text |
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| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/00095/20631/18258.pdf |
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| Registros recuperados: 1.019 | |
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